Adcom Mobility Aid A720 User Manual

ADCON  
T E L E M E T R Y  
addIT A720/A723 Series  
User Guide  
SMART WIRELESS SOLUTIONS  
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3
Contents  
Chapter 1. Introduction_________________________________5  
What are addIT devices? _________________________________ 5  
Installing the base station _______________________________10  
Installing the receiver ________________________________10  
Installing the power supply ___________________________11  
Configuring the software _____________________________12  
Chapter 3. Using the RTU ______________________________13  
Opening the packages__________________________________13  
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4
Contents  
More about the LED tool ____________________________ 16  
Configuring an addIT RTU in the addVANTAGE software 17  
Maintaining and servicing the RTU_______________________ 17  
Device series _________________________________________ 22  
The RTU connectors ________________________________ 23  
Command line interpreter ___________________________ 54  
Real time clock _____________________________________ 54  
Radio interface _____________________________________ 54  
Index ________________________________________________ 61  
Credits and Colophon_________________________________ 65  
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5
Chapter 1. Introduction  
A72xx series, including installation issues and certain parameter  
"Introduction," which gives some general information and  
"Using the Base Station," which details the installation and  
use of the receiving unit.  
"Using the RTU," which details the installation and use of the  
remote telemetry unit.  
"Performing Advanced Functions," which discusses technical  
information for the advanced user.  
What are addIT devices?  
Adcons addIT devices (A720, A723 and A720B) are uniquely  
suited to your remote measuring needs. The A720 and A723  
devices are remote telemetry units (RTU) that can be used with  
Adcon and other compatible sensors to track those parameters  
important to you. And the A720B device, in conjunction with your  
computer, is a base station that offers many ways for you to view  
and manipulate the data received from the RTUs.  
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CHAPTER 1  
6
Introduction  
The addIT A720/A723 RTU can be used in one of the following  
ways:  
Installed in the vicinity of an Adcon remote measuring station  
(A730MD), the addIT RTU can use the A730MD station to  
relay its data to a base station (A730SD or A840). If the base  
station is close enough to the addIT RTU, the RTU can  
communicate directly with the base station.  
As a standalone device, the addIT RTU communicates directly  
with the addIT base station (A720B).  
The addIT A720B base station works with up to three addIT RTUs,  
storing the data it receives until you download it to your computer.  
Installation issues  
The following restrictions apply:  
In general, the maximum “line-of sight” distance an addIT  
RTU can communicate is 800 m (approximately half a mile).  
This is valid if the partner device is mounted on a 3 m mast (9  
ft.) and the RTU is mounted on a 30 cm mast (1 ft.); the results  
may vary under different conditions.  
As with all wireless communication devices, the higher the  
transmitter is, the better the communication will be.  
Mountainous or hilly terrain makes for poor communication.  
When using the addIT RTU with an A730 system, Adcon  
strongly recommends limiting the number of RTUs to under 6  
per A730MD station in order to avoid exhausting the stations  
battery, especially during the winter. However, you can have  
as many RTUs as you want if they are directly connected to the  
base station.  
Note: Your local conditions may vary. If you are located closer to  
the Equator, the maximum obtainable energy is greater than  
that at the Poles and it may be possible to “hang” more  
addIT devices per station.  
When using the addIT RTU in a standalone system (that is,  
with an A720B base station), you are limited to a maximum of  
three RTUs per base station.  
addIT RTUs cannot route data. They can communicate with  
either the A730SD, A840 or A720B base station, or with an  
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CHAPTER 1  
7
Conventions  
A730MD remote station, but they cannot communicate with  
each other.  
All addIT devices accept the standard Adcon sensors;  
however, the connectors are different. Waterproof connectors  
are used to provide IP65 class protection. All new sensors will  
be delivered with this new connector. A special adapter will  
be supplied to connect new sensors to RJ-12 ports of the  
A730MD stations.  
Note: For technical reasons, Adcon cannot provide adapters for  
the RJ-12 connector to the addIT devices.  
Conventions  
Certain conventions apply in this documentation.  
Indicate the text is variable and must be substituted for  
something specific, as indicated in the explanation.  
Italics can also be used to emphasize words as words  
or letters as letters.  
Italics  
Bold  
Indicates special emphasis of the text. Also indicates  
menu names and items in a window.  
Indicates characters you must type or system mes-  
sages.  
fixed font  
FileSave  
Note  
Indicates menu selection. For example, select the File  
menu, then the Save option.  
Indicates information of interest. Notes appear after  
the information they apply to.  
Indicates that you may get unexpected results if you  
don’t follow the instructions. The graphic symbol  
appears next to the paragraph the Caution applies to,  
and the Caution text follows the paragraph.  
CAUTION  
Indicates danger to yourself or damage to the device if  
you don’t follow the instructions. The graphic symbol  
appears next to the paragraph the Warning applies  
to, and the Warning text follows the paragraph.  
WARNING  
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CHAPTER 1  
8
Introduction  
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9
Chapter 2. Using the Base Station  
Your addIT base station consists of the receiver (A720B), the power  
supply (A720PS), and addVANTAGE Lite software.  
Note: If you are using the addIT RTU as part of an A730 system,  
this chapter does not apply to you. For information about  
the addIT RTU, see “Using the RTU” on page 13. For infor-  
mation about installing an A730 base station, refer to the  
addVANTAGE A730 User Guide or the addVANTAGE A730  
Releases Notes for Version 3.35.  
Opening the packages  
You get several boxes when you purchase the addIT base station.  
When you open them, youll see they contain:  
The A720B receiver and ring clamp  
The A720PS power supply, serial cable, and power cord  
The 30-meter (approx. 99 ft) base station communication  
cable  
The addVANTAGE Lite software on a CD-ROM  
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CHAPTER 2  
10  
Using the Base Station  
Make sure youve received all the equipment and read through the  
instructions that follow. When youre sure you understand them,  
youre ready to install your base station.  
Installing the base station  
The following considerations are important to installation:  
From a radio perspective, the height of the receiving antenna  
is essential—the higher the antenna, the greater the  
communication range. In the case of the addIT devices, the  
antenna is built-in; therefore, the entire unit must be mounted  
as high as possible. A roof is an ideal location.  
Put the base station in the location most convenient to where  
you work, but keep in mind that, geographically, it is better to  
have it in the center of the area where the transmitters will be  
installed.  
Do not put the base station in places like cellars, near heat  
sources, or in damp locations.  
Make sure you have a telephone connection next to the PC  
for those times when you need technical support.  
Installing the receiver  
The receiver communicates over an RS485 interface. The receiver  
and the RTU look very much like, except that the receiver has only  
one connector, which links the receiver to the power supply.  
Figure 1 illustrates the addIT receiver.  
TO  
POWER  
SUPPLY  
Figure 1. addIT Receiver  
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CHAPTER 2 11  
Installing the base station  
Follow these steps to install the receiver part of the base station.  
1. Locate the best site for the receiver and mount a rod on the  
spot. The best site is usually on top of a roof or a mast.  
2. Using the provided ring clamps, attach the receiver to the  
rod.  
3. Attach the female connector on the cable to the male  
connector on the receiver by turning the plugs fastening  
screw.  
Note: Standard cables are 30 m (approx. 99 ft) long. If you need a  
longer cable, you can purchase additional cables to extend  
the length up to 500 m (1640 ft).  
4. Secure the cable to the rod with ties.  
5. Bring the unattached end of the cable into the area where  
your computer is.  
Installing the power supply  
The A720PS power supply is the connection between the receiver  
and your computer. The power supply is universal and operates  
from 85 to 240 volts. Adcon supplies the serial cable and power  
cord. Figure 2 illustrates the addIT power supply.  
RS-232 SERIAL PORT  
MAINS  
FUSE  
RS-485 SERIAL PORT  
Figure 2. addIT Power Supply  
Follow these steps to install the power supply:  
1. Attach the cable from the receiver to the power supply.  
2. Attach one end of the serial cable to the power supply and  
the other end to an available serial port on your computer.  
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CHAPTER 2  
12  
Using the Base Station  
Note: The serial cable ends are identical, so it doesn’t matter which  
you use in each location.  
3. Plug the appropriate ends of the power cord into the power  
supply and the power source (outlet).  
Figure 3 shows the base station configuration.  
Figure 3. Base Station Configuration  
Replacing the fuse  
Should you need to replace the fuse, simply remove the old fuse  
from the power supply and insert a new 250 mA 250 V fuse.  
Configuring the software  
addVANTAGE 4.1 Lite Reference Manual for instructions about  
using addVANTAGE Lite software.  
If you are experienced in technical software issues, you can also  
perform some configuration with the receiver by using a terminal  
window. See “Conguring the devices” on page 24 for these  
instructions.  
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13  
Chapter 3. Using the RTU  
Remember that the addIT A720/A723 remote telemetry units  
(RTUs) can be used either with the A730 system or as standalone  
systems with the A720B base station. The base station is discussed  
in Using the Base Station” on page 9.  
Opening the packages  
You get several boxes when you purchase an addIT RTU. When  
you open them, youll see they contain:  
The A720/A723 RTU and ring clamp  
The solar panel, ring clamp, and connecting cable  
The aluminum rod and its cap  
A sensor and cable, one box for each sensor, with a fastening  
tie in each sensor box  
An LED tool  
Make sure youve received all the equipment and read through the  
instructions that follow. When youre sure you understand them,  
youre ready to install your RTU.  
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CHAPTER 3  
14  
Using the RTU  
Figure 4 shows an addIT RTU.  
PROTECTIV E CAP  
TO  
SOLAR  
PANEL  
SERIAL  
NUMBER  
TO  
SENSORS  
Figure 4. addIT RTU  
Installing the RTU  
Installing addIT RTUs in the field is a fairly simple process. Youll  
perform a connectivity check with an LED tool (addIT devices dont  
have a built-in LED like the A730MD stations do).  
Note: The LED tool is a blind plug to be plugged in the POWER  
connector.  
Follow these steps to install an addIT RTU in the field:  
1. Review the installation area and choose the best site.  
2. Perform a connectivity check using the LED tool:  
a. Insert the LED tool in the POWER connector and wait up to  
10 seconds. If the unit connects to at least one station (or  
a base station), it will light up the LED for about 4  
seconds.  
b. Keep observing the LED tool and, after another several  
seconds, the LED will blink one or more times (the  
number of blinks indicates the number of stations it has  
contacted).  
3. Using a hammer, drive the supplied aluminum rod into the  
ground. How far you drive the rod into the ground depends  
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CHAPTER 3 15  
Installing the RTU  
on your application. Put a plastic cap on top of the rod to  
protect it.  
4. Using a ring clamp, fasten the solar panel onto the aluminum  
rod. Ensure that the panel is facing south (north if you are  
located in the southern hemisphere) and out of the way of the  
addIT RTU.  
Note: The solar panel can be mounted under or behind the addIT  
RTU, but be sure that the RTU does not shadow the panel.  
5. Fasten the addIT RTU to the top of the rod using another ring  
clamp. Adcon recommends that you perform another  
connectivity test, if you can, to check the positioning of the  
device.  
6. Attach the sensors to the I/O connectors and the solar panel  
to the POWER connector by turning the plugs’ fastening screws  
WARNING If you turn the fastening screws too tightly, you could  
damage the plugs.  
7. Secure the extra length of the sensor cables to the rod with  
ties.  
Figure 5 shows what a typical RTU field installation looks like.  
Figure 5. RTU in the Field  
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CHAPTER 3  
16  
Using the RTU  
This completes the installation of your addIT RTU. If one of the I/O  
connectors is left unused, use the cap specially provided to protect  
it against moisture and dust. Be sure to make a note of the follow-  
ing information because youll need it when you configure the  
device in the software:  
Serial number for each RTU  
Type of sensors connected to each RTU  
More about the LED tool  
The LED tool allows you to rapidly check the status of an addIT  
RTU. After you insert the LED tool into the POWER connector, the  
unit waits up to two seconds and then sends a broadcast frame. If a  
nearby listening station or receiver decodes the frame, it will  
answer back—this may take up to 10 seconds. When an answer is  
received, the LED tool lights up for about 4 seconds. After another  
few seconds, the LED lights up one or more times, depending on  
the number of stations/receivers that answered to its broadcast  
frame.  
Note: addIT RTUs do not respond to a broadcast frame, only  
remote stations (A730MD) and base stations (A730SD or  
A720B).  
In addition, the LED always blinks briey at 0.5 second intervals to  
indicate that the unit is alive and the internal battery has enough  
energy to operate. If the blinking interval lengthens to 2 seconds,  
the battery has become undercharged (that is, under 5.6 volts but  
over 5.2 volts)—this is called the misery state. In this state, an  
addIT RTU reduces its activities to a minimum. The radio unit is  
switched off, the sensor sampling ceases, and no data is stored in  
the internal memory. Only the internal real-time clock is maintained  
and the power management functions are performed.  
If the battery level drops below 5.2 volts, the system switches com-  
pletely off, effectively decoupling itself from the battery in order to  
protect it. In this case the LED tool stays permanently off. An addIT  
RTU in such a situation will restart only after connecting it to an  
external power supply (even a solar panel under low light condi-  
tions).  
Note: New addIT RTUs are delivered with their internal batteries  
unformatted, meaning they are completely discharged, and  
you should install them only on sunny days. The battery will  
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CHAPTER 3 17  
Maintaining and servicing the RTU  
be fully charged after two consecutive sunny days, but you  
should get an LED light-up after several minutes of charging  
in the sunlight.  
Configuring an addIT RTU in the addVANTAGE software  
If youre using an addIT RTU with an A730 system, you can config-  
ure the RTU by following the steps described in the addVANTAGE  
A730 Releases Notes for Version 3.35 or in the addVANTAGE 3.40  
User Manual. If youre using the addIT RTU with addVANTAGE  
Lite, follow the steps described in the addVANTAGE 4.1 Lite Refer-  
ence Manual.  
Maintaining and servicing the RTU  
The A720 and A723 units need virtually no maintenance. They are  
waterproof and designed to withstand harsh environmental condi-  
tions (-30 to +70 °C, or -22 to 158 °F), high RH values, water, and  
other noncorrosive liquids. They conform to the European protec-  
tion class IP65. This applies also to the connectors, as long as they  
are mated. Dont let unmated connectors on either the addIT RTU  
or the sensors be exposed to the environment for extended peri-  
ods of time.  
The RTU battery  
Note: The same type of battery is used in the A720/A723 and  
A720B devices, so the information in this section also  
applies to the A720B.  
The internal battery supplies 6.2 volts and consists of a NiCd pack.  
The internal electronics manage the battery charging/discharging  
process, ensuring it a long life. This approach, coupled with a  
remarkably low average consumption (some mere 6 mW), allows  
an addIT RTU to operate at least one month on a fully charged  
battery, with the following conditions:  
The channel has moderate radio activity, with requests every  
15 minutes.  
Total consumption of attached sensors is no more than 50  
mA.  
The sensors are sampled once every 5 minutes and an  
averaged slot is stored in the internal memory every 15  
minutes.  
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CHAPTER 3  
18  
Using the RTU  
Table 1 shows the addIT devices’ expected operation time on a  
fully charged battery with 50 mA total consumption for the sensors,  
as described above.  
Table 1. addIT Device Operation Time  
Average  
Consumption  
(µA)  
Estimated  
Operation  
(days)  
Radio  
Sensor Sampling  
Activity (samples/15 min)  
No  
No sensors  
450  
540  
92  
77  
55  
38  
28  
13  
Yes  
Yes  
Yes  
Yes  
Yes  
No sensors  
1
750  
3 (default)  
1080  
1450  
3100  
5
15  
Note: Radio activity refers to the fact that one base station and  
between one and three A730MD or addIT remote stations  
are active on the same operating frequency as the addIT  
remote station under test.  
However, if for some reason (wear-out or accident) the battery  
loses its capacity (noted in the software with repeated “Battery  
low” messages), it must be replaced. Make sure, though, that the  
problem is really due to the battery and not to a defective or dirty  
solar panel.  
Note: The solar panel works only with the A720/A723 devices. The  
A720B receivers internal battery is charged by the power  
supply.  
Adcon highly recommends that you check the solar panels’ state  
and clean them often. The rain droplets can splash thin layers of  
soil on the panels, greatly reducing their power output. The sur-  
rounding vegetation can also lower the panels’ efficiency.  
Changing the battery  
Note: The same type of battery is used in the A720/A723 and  
A720B devices, so the information in this section also  
applies to the A720B.  
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CHAPTER 3 19  
Maintaining and servicing the RTU  
If you have verified that the battery needs to be replaced, follow  
these steps to do so:  
1. Open the lid by unscrewing the four screws in the corner of  
the addIT RTU.  
2. Gently remove the lid (the battery is fixed on the lid and is  
connected to the electronics board by means of a connector).  
3. Remove the batterys plug from the PCB connector.  
4. Remove the battery pack from the lid (it is taped to the lid)  
and replace it with a new one (obtainable from Adcon).  
5. Insert the battery plug into the PCB connector.  
6. Mount the lid back, taking care that the rubber gasket sealing  
the box is not out of place.  
WARNING Be sure to mount the rubber gasket properly, so that  
the units IP65 environmental protection is not affected.  
7. Screw the four screws back in, applying a moderate force.  
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CHAPTER 3  
20  
Using the RTU  
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21  
Chapter 4. Performing Advanced  
Functions  
With the appropriate knowledge, you can configure the addIT  
devices in the field by using a hyperterminal window. To configure  
the RTU, you will need a special serial cable adapter (not supplied,  
available from Adcon).  
CAUTION Do not try to configure your addIT devices if you are  
not sure what to do—the unit may not communicate with the  
remote measuring station or function with the addVANTAGE  
software.  
WARNING Tampering with parameters for the addIT devices may  
void your warranty or damage the device. In general, the  
commands described in this chapter are intended for technical  
support staff and users with a great deal of highly technical  
hardware and software experience.  
In the system architecture, the base station and RTU are both con-  
sidered to be nodes. The base station is called the master node, or  
master, while the RTU is called the slave node, or slave.  
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CHAPTER 4  
22  
Performing Advanced Functions  
Device series  
Currently, two A720 device versions are in use: Series 1 and  
Series 2. in addition, since begin of 2001, Adcon introduced also  
the Series 3 model (A723). You can determine which series a  
device is in any of these ways:  
The VERcommand (see pages 29 and 52). When the device is  
connected, you can type this command to the series. With a  
Series 1 device, the command returns VER 1.0or higher,  
while with a Series 2 device, the return is VER 2.0or higher.  
This is the most reliable method of determining which series  
you have. To differentiate between A720 and A723 devices,  
type the command TYPE, and an A723 will return the string  
TYPE A723.  
The logo on the front of the device. Series 2 devices include  
such wording on the logo. However, if you returned a Series 1  
device for repair, it is possible that it was replaced with a  
Series 2 motherboard. In such a case, you would have a  
Series 2 device in Series 1 housing. Series 3 devices (A723)  
are marked as such.  
Understanding connectors  
sensors or the computer.  
The receiver connector  
The addIT A720B receiver has one 4-pin connector. Figure 6 illus-  
trates this connector and Table 2 details the connections.  
1
2
Gnd  
V+  
A
3
4
B
Figure 6. addIT Receiver Connector (Top View)  
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CHAPTER 4 23  
Understanding connectors  
Table 2. addIT Receiver Pin Functions  
1
2
3
4
Bus Power (V+)  
Bus Power (GND)  
Bus Communications (B)  
Bus Communications (A)  
The RTU connectors  
The addIT RTU uses standard 7-pin sensor I/O A and I/O B con-  
nectors (model Binder 702 and 712 series or equivalent) that are  
identical. Each connector contains three analog inputs (0 to 2.5  
volt) and two digital input/outputs, one of which you can use as a  
pulse counter (for example, a rain gauge). Figure 7 illustrates the  
individual pins of an I/O connector.  
Switched Battery  
Cabling 1  
Cabling 2  
(Analog In)  
(Analog In)  
Digital I/O  
7
6
1
2
5
3
4
Pulse Counter  
Cabling 3 (Analog In)  
Ground  
Figure 7. Pins on an I/O Connector (Top View)  
If you have a special passive extender cable, you can use it to plug  
more than one sensor to one connector.  
CAUTION To avoid cabling conflicts, first verify in the  
addVANTAGE software that the sensor combination in the  
configuration you want is allowed. If there are no conflicts, you can  
physically attach the sensors to the addIT RTU.  
addIT RTUs can also be used to control actuators and to switch on  
or off pumps, valves, or other similar devices (for example, using  
the Macro extension). The same principles for macro commands  
using an A730MD remote measuring devices apply to addIT RTUs,  
with the sole difference that instead of three, only the first two out-  
puts are available.  
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CHAPTER 4  
24  
Performing Advanced Functions  
The RTU also has a POWER connector. Figure 8 illustrates the con-  
nections available at the POWER connector.  
5
1
RxD  
TxD  
Ext Power  
Battery  
4
2
3
Ground  
Figure 8. addIT RTU POWER Connector (Top View)  
WARNING The RxD and TxD connections are not RS-232  
compatible.  
This conguration allows the use of external power supplies or  
extra batteries (contact Adcon for further details).  
Configuring the devices  
You can use a Windows Hyperterminal window to connect to either  
addIT device. After you have installed the system, follow these  
steps to configure the device:  
Note: To configure the A720B receiver, use the serial cable that  
comes with the system. To configure the A720 or A723 RTU,  
you must have the special adapter cable (available from  
Adcon) and plug it into the POWER connector.  
1. Open a Hyperterminal window.  
2. Select the appropriate serial port and click OK.  
3. Configure your terminal as follows:  
19200 baud  
1 stop bit  
8 data bits  
No parity  
No flow control  
Send LF after CR  
4. Select OK to open the terminal window.  
5. Press Enter to generate a response in the window.  
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CHAPTER 4 25  
Serial communication protocol  
Serial communication protocol  
This protocol is based on a master sending commands and a node  
answering; the whole communication is conducted in plain ASCII,  
as strings. When exchanging numbers, they are represented in  
decimal format. All commands are terminated with a CR/LF combi-  
nation. All responses (answers) are terminated with the # character.  
General format of a command  
The commands have the following format:  
ID Command Param1 Param2 ... ParamN  
IDis the destination device. If you include an ID as part of a  
command, the node checks whether ID=ownID. If it does,  
the node executes the command on itself. If the ID is not the  
nodes ID, the node executes the command on a remote  
device, if such an ID exists. If the ID is missing, this implies  
that the command is addressed locally.  
Note: Not all the commands can be relayed remotely.  
Commandis the command proper, which can be composed of  
a variable string of characters (for example, SLOT). Each node  
can implement a set of commands depending on the  
functionality of the node itself. However, as a minimum  
requirement, a node recognizes the CMDScommand, which  
returns a list with the commands recognized by the node.  
Param1 Param2 ... ParamNrepresent the parameters,  
which are command dependent. If you type no parameters  
when you issue a command, it is the equivalent of querying  
for information (the GET version of a command). If you type  
parameters, you are issuing the SET version of a command  
and are setting the command to the parameters you typed.  
General format of an answer  
The answers have the following format:  
ID Command Result1 Result2 ... ResultN ErrResult #  
IDis the answering device. If a command was further routed,  
it is the ID of the end device. The answer must always contain  
the ID on return.  
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CHAPTER 4  
26  
Performing Advanced Functions  
Commandis the string representing the original command. It is  
supplied so that a master can distinguish between the  
answers it is waiting for, and out-of-band notifications (which  
may come, for example, over the radio port of a node). As  
with the ID, the command name must be always supplied.  
Result1 Result2 ... ResultNare the result values  
returned by the remote node. If the ErrResultis not zero,  
all other possible characters and/or strings until the end of the  
line may be ignored.  
ErrResultshows whether the command was successfully  
executed. If this value is 0, the command was successfully  
executed. If this value is other than 0, the command failed.  
The number may further indicate the error type. (See also  
Returned errors list” on page 54.)  
The answer string may contain any number of spaces or CR/LF  
characters between its components; however, after the terminator  
(#) no other characters are allowed.  
Using terminal commands  
Following is a list of available commands and an explanation of  
their use.  
Note that for Series 1 devices, you preface a change in a setting  
with SET, while with Series 2 devices you do not.  
Note: You can type uppercase or lowercase characters because the  
commands are not case sensitive.  
Series 1 devices  
The SET series of commands  
COMMAND  
DESCRIPTION  
PARAMETERS  
RETURNS  
SET OWNID nnnn  
Sets the identification of the unit.  
nnnn is the ID number of the unit.  
Nothing.  
REMARKS  
The ID number must be identical to the one written on the units  
label.  
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CHAPTER 4 27  
Using terminal commands  
EXAMPLE  
SET OWNID 2003  
COMMAND  
DESCRIPTION  
PARAMETERS  
SET PMP bl bh  
Sets the power management parameters.  
bl is the lower battery level (the threshold where the charging of  
the battery is switched on) and bh is the higher battery level (the  
charging is switched off).  
RETURNS  
REMARKS  
Nothing.  
Both bl and bh are expressed in volts X 10 (for example, 72 actually  
means 7.2 V). Default values (factory programmed) are 65 and 72,  
meaning 6.5 and 7.2 volts respectively.  
EXAMPLE  
To change the switch-on threshold to 6.3 and the switch-off thresh-  
old to 7.0 volts:  
SET PMP 63 70  
COMMAND  
DESCRIPTION  
PARAMETERS  
SET SLOT storage samples  
Configures the input sampling and storing intervals.  
storage represents the time (in seconds) elapsed between two  
slots stored in the internal memory, while samples represents the  
numbers of samples used to build the average that will be stored.  
RETURNS  
REMARKS  
Nothing.  
The default storage is 900 (15 minutes) and samples is 3 (3 sam-  
ples per quarter of an hour).  
EXAMPLE  
To sample the inputs (sensors) every minute and build an hourly  
average:  
SET SLOT 3600 60  
To sample the inputs once per hour and store the values as they  
are:  
SET SLOT 3600 1  
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CHAPTER 4  
28  
Performing Advanced Functions  
WARNING Changing the above parameters may adversely affect  
the ability of the device to operate for extended periods under low  
solar radiation conditions when used with addVANTAGE 3.x. Even  
if you change them, addVANTAGE will not display the charts  
accordingly: the current addVANTAGE version supports only 15-  
minute data slots. Changing the storage parameter to lower than  
60 or higher than 1500 will lead to a total data loss in  
addVANTAGE 3.x. This warning does not apply to usage with  
addVANTAGE 4.x Lite software.  
COMMAND  
DESCRIPTION  
PARAMETERS  
SET FREQ freq step  
Sets the units operating frequency.  
freq is the frequency and step is the channel spacing (both  
expressed in Herz).  
RETURNS  
REMARKS  
EXAMPLE  
Nothing.  
Convert values to Herz before issuing the command.  
To change the frequency to 467.1125 MHz with a channel spacing  
of 12.5 kHz:  
SET FREQ 467112500 12500  
CAUTION Do not change the frequency of your device without  
reason: apart from the fact it may not communicate in the network  
anymore, you may also violate the applicable radiocommunica-  
tions laws in your country. Depending on the destination country,  
some models may also return an error message.  
COMMAND  
DESCRIPTION  
PARAMETERS  
RETURNS  
SET RSSI value  
Sets the Relative Signal Strength Indicator threshold.  
value is the RSSI setting.  
Nothing.  
REMARKS  
The factory default is set to 58 units. The RSSI threshold is used to  
detect if any radio activity is on the channel. The value set must be  
approximately 30% higher than the actual measured value when no  
signal is present on the channel. To measure the actual value, use  
the command RSSI(see "Querying the actual configuration  
parameters").  
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CHAPTER 4 29  
Using terminal commands  
EXAMPLE  
To set the RSSI threshold to 58:  
SET RSSI 58  
Querying the actual configuration parameters  
You can query an addIT to find out its actual configuration parame-  
ters (GET the parameter). Typing OWNID, for instance returns the  
actual ID an addIT answers to (it should be the same as the one on  
its label). In addition to OWNID, PMP, SLOT, FREQ, and RSSI, the  
command VERreturns the current software version of the device.  
The RSSIcommands returns two values: the actual measured  
value of the RSSI and the value set as threshold. As noted else-  
where, the threshold must be approximately 30% higher than the  
actual measured value. The actual RSSI is unstable due to the  
channels random noise, receivers internal noise, and/or to trans-  
missions just taking place. If the actual RSSI value is consistently  
higher than the programmed value, something must be wrong, or  
the channel is very noisy (however, before readjusting the RSSI  
threshold, check this with a handheld radio receiver or a scanner).  
Other commands available in terminal mode are:  
DUMP addrdisplays 256 bytes of the internal EEPROM  
memory, starting with the address addr (specied as hex  
values). Valid addresses for the model A720 are B600 to B9FF.  
The last 16 slots of data (for 15-minute slots, that makes 4  
hours of data) are stored at B900 to B9FF. The remainder are  
used for internal configuration parameters or reserved for  
future use.  
RX—switches the device to receive mode until a key is  
pressed. This command is used for trimming or checking  
purposes.  
XMIT param—switches the device to transmit mode until a  
key is pressed. This command is used for trimming or  
checking purposes. param may be any of the following:  
0—a 2 kHz tone will be modulated on the transmitted  
carrier  
1—a 1 kHz tone will be modulated on the transmitted  
carrier  
T—a mixture of 1 and 2 kHz test tones  
Not given—an unmodulated carrier will be transmitted  
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CHAPTER 4  
30  
Performing Advanced Functions  
B– sends a broadcast frame and displays all the answers.  
Series 2 and 3 devices  
Note: With Series 2 and 3 devices, typing the command by itself is  
a GET command, while typing the command with parame-  
ters or variables is a SET command.  
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
REMARKS  
CMDS  
A720, A720B, A723  
Returns a list of supported commands.  
None.  
GET only.  
RETURNS  
A list of strings separated by spaces.  
No.  
REMOTE  
EXAMPLE  
CMDS  
193 CMDS CMDS ID PMP RSSI TIME FREQ DEV DEL REPL  
SLOT DATA INFO RX TX ERA 0  
#
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
TIME  
A720B, A723  
Sets/returns the real time clock.  
The actual time, or none in the GET version.  
The actual time as dd/mm/yyyy hh:mm:ss.  
GET/SET.  
REMARKS  
REMOTE  
No.  
EXAMPLES  
TIME 12/12/1998 22:10:10  
193 TIME 0  
#
TIME  
193 TIME 12/12/1998 22:10:10 0  
#
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CHAPTER 4 31  
Using terminal commands  
COMMAND  
FREQ  
CAUTION Do not change the frequency of your device without  
reason. Apart from the fact that it may not communicate with the  
network anymore, you may also violate the applicable radio-  
communications laws in your country. Depending on the  
destination country, some models may also return an error  
message when trying to use this command.  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
A720, A720B, A723  
Sets/returns the operating frequency.  
The operating frequency and step (Hz), or none in the GET version.  
The actual frequency and step, in Hz.  
GET/SET.  
REMARKS  
REMOTE  
Yes, SET only.  
EXAMPLE  
FREQ 433925000 25000  
193 FREQ 0  
#
FREQ  
193 FREQ 433925000 25000 0  
#
COMMAND  
APPLIES TO  
RSSI  
A720, A720B, A723  
DESCRIPTION  
Sets/returns the Relative Signal Strength Indicator threshold at  
which an RF receiver must wake up.  
PARAMETERS  
The threshold value. For the A720 family, it can take values from 0  
to 255; it is typically factory set to 58. For the A723, it typically fac-  
tory set to 42.  
RETURNS  
REMARKS  
The instant RSSI value and the programmed threshold.  
The factory default is set to 58 units. The RSSI threshold is used to  
detect if any radio activity is on the channel. The value set must be  
approximately 30% higher than the actual measured value when  
no signal is present on the channel. To measure the actual value,  
use the command RSSIwith no variables or parameters.  
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CHAPTER 4  
32  
Performing Advanced Functions  
REMOTE  
No.  
EXAMPLE  
RSSI 58  
193 RSSI 0  
#
RSSI  
193 RSSI 44 58 0  
#
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
ID  
A720, A720B, A723  
Sets/returns the nodes ID.  
The node ID.  
The node ID.  
GET/SET.  
REMARKS  
REMOTE  
Yes, SET only.  
EXAMPLE  
ID 4557  
193 ID 0  
#
ID  
4557 ID 4557 0  
#
6556 ID 7557  
6556 ID 0  
#
Note: The last example shows a case where a remote node was  
instructed to change its own ID from 6556 to 7557. Even if it  
changed its ID, it answers with the old ID in order to cor-  
rectly finish the transaction.  
COMMAND  
SLOT  
CAUTION Changing these parameters may adversely affect the  
ability of the device to operate for extended periods under low  
solar radiation conditions.  
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CHAPTER 4 33  
Using terminal commands  
APPLIES TO  
A720, A720B, A723  
Sets/returns the input storing and sampling intervals.  
DESCRIPTION  
PARAMETERS  
storage represents the time (in seconds) elapsed between two  
slots stored in the internal memory, while samples represents the  
numbers of samples used to build the average that will be stored.  
RETURNS  
REMARKS  
The interval and rate.  
The default storage is 900 (15 minutes) and samples is 3 (3 sam-  
ples per quarter of an hour).  
REMOTE  
Yes, SET only.  
EXAMPLE  
SLOT 900 3  
193 SLOT 0  
#
SLOT  
193 SLOT 900 3 0  
#
Note: The A720B base station needs only the rate. For consis-  
tency, however, it accepts both parameters and discards the  
one it doesn’t need.  
COMMAND  
APPLIES TO  
PMP  
A720, A720B, A723  
DESCRIPTION  
Sets/returns the nodes Power Management Parameters (switches  
on/off the battery charge).  
PARAMETERS  
RETURNS  
The lower (switch on) and the higher limit (switch off), both in volts  
x 10. Standard Values are 65 (for 6.5 Volts) for switch on and 72 (for  
7.2 Volts) for switch off.  
The lower (switch off) and the higher limit (switch on), both in volts  
x 10.  
REMARKS  
REMOTE  
EXAMPLE  
GET/SET.  
Yes, SET only.  
PMP 65 72  
193 PMP 0  
#
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CHAPTER 4  
34  
Performing Advanced Functions  
PMP  
193 PMP 65 72 0  
#
COMMAND  
APPLIES TO  
CM  
A723  
DESCRIPTION  
PARAMETERS  
Sets/returns the A720 compatibility mode.  
0 means A723 native mode while 1 switches the unit in A720 com-  
patible mode. In this mode, although the device presents itself as  
an A723 (when issuing the INFOcommand), it will return the frame  
type 38 when asked for DATA(see also “DATAon page 36). This  
mode is useful when the A723 device is used with the A720B base  
station or with an addVANTAGE 3.35 software (addVANTAGE 3.4  
and later recognizes an A723 in its native mode).  
There is also an additional compatibility mode (CM 2) that forces  
the A723 to respond with an A720 compatible answer to the INFO  
command. This mode is not recommended for normal use.  
By default the A723 devices are delivered in native mode (CMis 0).  
RETURNS  
REMARKS  
REMOTE  
EXAMPLE  
The current mode.  
GET/SET.  
No.  
CM 1  
193 cm 0  
#
CM  
193 CM 1 0  
#
COMMAND  
APPLIES TO  
SST  
A723  
DESCRIPTION  
Sets/returns Sensor Sampling Time. This is the delay allowed for  
the sensors to settle after applying them power and until they are  
sampled.  
PARAMETERS  
The settling time in seconds.  
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CHAPTER 4 35  
Using terminal commands  
RETURNS  
REMARKS  
REMOTE  
EXAMPLE  
The actual sensor settling time (default is 2 seconds).  
GET/SET.  
No.  
SST 2  
193 sst 0  
#
SST  
193 sst 2 0  
#
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETER  
RETURNS  
DEV  
A720B  
Inserts/reads the devices in the local devices list.  
The devices list (in the GET version). The GET version displays  
additional information about the devices, such as the last slot in  
the local memory and a flag showing whether a notification is  
pending (for more details about notifications, see “Notifications”  
on page 53).  
REMARKS  
REMOTE  
EXAMPLE  
GET/SET.  
No.  
DEV 5667  
193 DEV 0  
#
DEV  
193 DEV  
5667 22/1/1999 19:39:40 0  
5668 21/1/1999 15:26:54 0 0  
#
COMMAND  
APPLIES TO  
REPL  
A720B  
DESCRIPTION  
Replaces a device ID by another device ID in the local devices list.  
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CHAPTER 4  
36  
Performing Advanced Functions  
PARAMETERS  
RETURNS  
REMARKS  
REMOTE  
The old ID and the new ID.  
Nothing.  
SET only.  
No.  
EXAMPLE  
REPL 5667 5666  
193 REPL 0  
#
REPL  
193 REPL 5  
#
Note: The second example shows a REPLcommand without  
parameter: error 5 is returned (missing or false parameter).  
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
DEL  
A720B  
Deletes a device from the local devices list.  
The ID of the device to be deleted.  
Nothing.  
SET only.  
No.  
REMARKS  
REMOTE  
EXAMPLE  
DEL 5666  
193 DEL 0  
#
DEL  
193 DEL 5  
#
Note: The second example shows a DELcommand without param-  
eter: error 5 is returned (missing or false parameter).  
COMMAND  
APPLIES TO  
DATA  
A720, A720B, A723  
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CHAPTER 4 37  
Using terminal commands  
DESCRIPTION  
PARAMETER  
Returns data stored for a certain device.  
The ID of the device for which the data is requested and the date/  
time (in the standard format) the data was stored. If missing, then it  
refers to the data of the local device.  
RETURNS  
REMARKS  
A data block.  
GET only. If you dont include the date/time parameter, the latest  
data is returned. If you include the date/time parameter, the date  
and time closest to, but later than, the given date/time is returned.  
REMOTE  
Yes, for a GET on the A720B and A723, but only one frame at a  
time. If you are using a terminal window for the A720, you cannot  
issue the DATAcommand remotely. If you are using a terminal win-  
dow for the A720B, you can issue a DATAcommand for an A720 or  
A723 RTU, but you cannot issue the command for the A720B  
receiver. In other words, the base station can issue a remote com-  
mand for an RTU, but it cannot issue such a command for itself.  
The A720 RTU can issue the command only for itself, and only  
locally, while the A723 RTU can also issue remote data commands.  
EXAMPLE  
DATA 5666 12/12/1998 12:12:12  
193 DATA b1 b2 b3 ... bn 0  
#
The data block returned will typically contain a number of data  
frames (telegrams). The structure of a block is as follows:  
dd mm yyyy hh mm ss si ft d1 d2 ... dn dd mm yyyy  
... dn cs  
where:  
dd mm yyyyis the date  
hh mm ssis the time  
siis the size of the frame  
ftis the frame type (38 for addIT devices)  
csis a 16-bit checksum obtained by summing the bytes and  
discarding the carries over 0xFFFF  
The A720 devices respond with a type 38 data frame, while the  
A723 may respond with type 38 or type 39, depending on the CM  
ag (see also “CMon page 34). The most important difference  
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CHAPTER 4  
38  
Performing Advanced Functions  
between the frames 38 and 39 is that the later accomodates for 12  
the frame differs.  
The composition of the data block of a frame type 38 (the bytes  
marked as d1, d2... dn) is depicted in Figure 9, a type 39 frame in  
Figure 10 while the digibyte is depicted in Figure 11 and  
Figure 12.  
RF incoming  
RF outgoing  
Digibyte  
Pulse Counter I/O B  
Pulse Counter I/O A  
Battery  
D1  
D2  
D3  
D4  
D5  
D6  
D7  
D8  
D9 D10 D11 D12 D13  
Cabling 1 I/O B  
Cabling 2 I/O B  
Cabling 3 I/O B  
Cabling 1 I/O A  
Cabling 2 I/O A  
Cabling 3 I/O A  
Reserved  
Figure 9. Frame 38 description  
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CHAPTER 4 39  
Using terminal commands  
RF incoming  
RF outgoing  
Digibyte  
Pulse Counter I/O A  
Pulse Counter I/O B  
Battery  
D1  
D2  
D3  
D4  
D5  
D6  
D7  
D8  
D9 D10 D11 D12  
Cabling 1 I/O A  
Cabling 2 I/O A  
Cabling 3 I/O A  
Cabling 1 I/O B  
Cabling 2 I/O B  
Cabling 3 I/O B  
Figure 10. Frame 39 description  
b7  
SC  
b0  
Res Res Dig A Dig B  
Res  
U
U
SC — Battery charge (0–off, 1–on)  
Res — Reserved  
Dig A — Digital I/O A  
Dig B — Digital I/O B  
U — Undefined  
Figure 11. The Digibyte for an A720 device  
b7  
SC  
b0  
Dig 6 Dig 5 Dig 4 Dig 3 Dig 2 Dig 1 Dig 0  
SC — Battery charge (0–off, 1–on)  
Dig n — Digital I/O A...X  
Note: Only Dig A and Dig B are wired externally  
Figure 12. The Digibyte for an A723 device  
The remote version is limited to a single frame. An example of  
such a command is given below:  
6367 DATA 6367 30/4/1999 14:50:00  
6367 DATA  
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CHAPTER 4  
40  
Performing Advanced Functions  
30 4 1999 14 54 55 14 38 255 255 77 0 0 89 156 126  
20 0 0 0 0  
3185 0  
#
Notice that if you need to get data that is not the last (newest) slot  
remotely from a device, the ID must be supplied twice. If you need  
to get the last slot stored, you can ignore the ID and the date/time  
parameters:  
8300 DATA  
8300 DATA  
13 5 1999 19 26 36 14 38 255 255 79 0 0 87 148 149  
15 0 0 0 0  
3138 0  
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
IMME  
A723  
Returns immediate data.  
None.  
A formatted string representing the data sampled on the input  
ports.  
REMARKS  
GET only. The answer to this command is delayed with the SST  
time (see also “SSTon page 34). The values represent the normal  
DATAframe values but formatted for easy human identification.  
REMOTE  
No.  
EXAMPLE  
IMME  
16816 IMME 30 8 2001 16 15 06 13 39 0 0 127  
0
0 95  
0
0
2350 0  
#
0
0
0
0
COMMAND  
APPLIES TO  
ROUTE  
A723  
DESCRIPTION  
Updates a routing table than will be used for remote commands  
(e.g. DATA, INFO, etc.).  
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CHAPTER 4 41  
Using terminal commands  
PARAMETERS  
The destination node and the intermediate nodes, on the order  
starting from the issuing node to the traget (remote) node.  
RETURNS  
REMARKS  
REMOTE  
The actual routing table (in GET mode).  
GET/SET.  
No.  
EXAMPLE  
ROUTE 2419 10836  
16816 ROUTE 0  
#
ROUTE  
16816 ROUTE  
2419 10836 0  
#
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
FDEV  
A720, A720B, A723  
Formats the internal memory (destroys all the data).  
None.  
Nothing.  
SET only.  
Yes, SET only.  
REMARKS  
REMOTE  
EXAMPLE  
FDEV  
193 FDEV 0  
#
Note: Depending on the devices memory size, this command may  
take several seconds to complete.  
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
INFO  
A720, A720B, A723  
Returns various status information.  
None.  
A list of a devices internal variables:  
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CHAPTER 4  
42  
Performing Advanced Functions  
ID INFO rf_in rf_out date time ver clk stack cop  
batt temp days_uptime min:sec_uptime rssi pmp_low  
pmp_high type slot samples po err_level  
#
The formats for the above parameters are as follows:  
rf_inand rf_outas a decimal  
dateas dd/mm/yyyy  
timeas hh:mm:ss  
veras x.x  
clk, stack, and copas decimal; they represent internal  
housekeeping parameters and are implementation  
dependent (the A720 uses copto number watchdog  
occurrences, but clkand stackare currently undened for  
the A720; for the A723 clkreturns the SST – Sensor Sampling  
Time value, default 2)  
battas battery level using the standard voltage conversion  
equation (0 is 0 volts, 255 is 20 volts)  
tempas internal temperature in the A720 housing, which is  
device dependent. The precision of the sensing element is  
very low (±4°C), but it is sufficient for battery power  
management (charge/discharge). To compute the actual value  
(in °C), the following equation must be used:  
1087  
Temp = internalTemp ----------- – 275  
255  
days_uptimein days; together with min:sec_uptime, it  
represents the amount of time the device is up without a reset  
or watchdog  
min:sec_uptimein minutes:seconds format  
rssias decimal; it is the programmed value with the RSSI  
command  
pmp_lowand pmp_highare the programmed values with the  
PMPcommand  
typeis used to represent the device type; following types are  
assigned currently:  
— 0 for A730MD  
— 1 for A720  
— 2 for A730SD  
— 3 for A720B  
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CHAPTER 4 43  
Using terminal commands  
— 4 for A733  
— 5 for A723  
— 6 for A440  
slotand samplesare the actual values programmed by  
means of the SLOTcommand  
po(A723 only) is the relative output power  
err_levelis the error value; 0 means no error  
REMARKS  
REMOTE  
GET only.  
Yes, GET only. The A720B and A723 can issue the command both  
remotely and locally, while the A720 can issue the command only  
locally.  
EXAMPLE  
INFO  
193 INFO 255 0 18/4/1999 21:5:11 1.3 0 0 0 91 72  
40 1:46 58 65 72 3 900 0 0  
#
COMMAND  
APPLIES TO  
DESCRIPTION  
ANLG  
A723  
Sets/returns various parameters of the analog subsystem (e. g. the  
sampling/averaging method used for individual data aquisition  
channels).  
PARAMETERS  
A control byte specifying the command and the analog input chan-  
nel number the command is acting on:  
Command Code  
Channel Number  
Figure 13. The ANLG Control Byte Layout.  
Some commands may also require one or two additional 16 bit  
parameters representing threshold values.  
The Channel Number selects the analog channel that will be  
affected by the command. For the A723 device, only 0000 to  
0101 are accepted (only 6 analog channels are available).  
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CHAPTER 4  
44  
Performing Advanced Functions  
The Command Code species the operation that will be  
applied to the selected channel. They are described in the  
table below:  
Table 3. Command Code Definitions for the Analog Command  
Code  
0000  
Description  
Parameters  
None.  
Returns  
The current sampling methods and the  
result (OK or ERROR). See also the table  
that follows.  
RSM – Read Sampling Method. This command reads the current  
programmed sampling method for all analog input channels.  
SSMMI – Set Sampling Method to Minimum. The specified ana-  
log channel will be instructed to store the lowest sampled value.  
0001  
0010  
0011  
The channel number.  
The channel number.  
The channel number.  
Result (OK or ERROR).  
Result (OK or ERROR).  
Result (OK or ERROR).  
SSMMA – Set Sampling Method to Maximum. The specified ana-  
log channel will be instructed to store the highest sampled value.  
SSMS – Set Sampling Method to Sum. The specified analog chan-  
nel will be instructed to store the sum of all sampled values.  
SSMAA – Set Sampling Method to Arithmetic Average. The speci-  
fied analog channel will be instructed to store the arithmetic  
average of all sampled values.  
0100  
0101  
The channel number.  
Result (OK or ERROR).  
Result (OK or ERROR).  
SSMCA – Set Sampling Method to Circular Average. The specified  
analog channel will be instructed to store the circular average of The channel number.  
all sampled values.  
SSMF – Set Sampling Method to First. Only the first sampled  
The channel number.  
0110  
0111  
Result (OK or ERROR).  
Result (OK or ERROR).  
value will be stored in each slot.  
SSML – Set Sampling Method to Last. Only the last sampled  
The channel number.  
value will be stored in each slot.  
a
Returns the time when the threshold  
was reached (in standard time format)  
and the result (OK or ERROR).  
RNS – Read Notification Status . If no notification was pending,  
1000  
The channel number.  
this command should return an error. If one was pending, the  
notification is cleared.  
RPNNER – Read the Pending Notifications and the Notification  
Enable Register. This command returns the 16-bit Pending Notifi-  
cations and the Notification Enable Registers; the Port Number  
has no significance for this command.  
Two 16-bit integers (first the PN and  
then the NE register) and the result (OK  
or ERROR).  
1001  
1010  
None.  
DAN – Disable Any Notification.  
The channel number.  
Result (OK or ERROR).  
One 8-bit char (Notification Type), two  
16-bit integers (first the lower limit and  
then the higher limit) and the result (OK  
or ERROR). If only a threshold was set,  
then the second 16-bit integer is irrele-  
vant.  
1011  
RNTTL – Read Notification Type and Thresholds/Limits.  
The channel number.  
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CHAPTER 4 45  
Using terminal commands  
Table 3. Command Code Definitions for the Analog Command  
Code  
1100  
Description  
Parameters  
Returns  
Result (OK or ERROR).  
The channel number and  
the threshold (16 bit  
value).  
ENOPTR – Enable Notify On Positive Threshold Reached.  
The channel number and  
the threshold (16 bit  
value).  
1101  
1110  
ENONTR – Enable Notify On Negative Threshold Reached.  
ENOL – Enable Notify if Out of Limits.  
Result (OK or ERROR).  
Result (OK or ERROR).  
The channel number and  
the limit values (16 bit  
value), first the lower  
and then the higher limit.  
The channel number and  
the limit values (16 bit  
value), first the lower  
and then the higher limit.  
1111  
ENIL – Enable Notify if Inside the Limits.  
Result (OK or ERROR).  
a. See also “Notifications” on page 53.  
Sampling methods are dened by three bits, as follows:  
Table 4. Sampling Method Definitions  
Sampling method  
Binary value  
000  
Description  
Reserved  
Minimum  
Maximum  
Sum  
Not defined.  
001  
010  
011  
If more than one sample per slot is performed, the lowes value will be stored.  
If more than one sample per slot is performed, the highest value will be stored.  
The sum of all samples for a certain slot will be stored.  
If more than one sample per slot is performed, the arithmetic average of all samples  
will be stored.  
Average (arithmetic)  
Average (circular)  
First sample  
100  
101  
110  
111  
If more than one sample per slot is performed, the average computed on a circle will  
be stored (i.e. on a 0 to 359 deg. circle, overflow occurs at the 359 deg value).  
If more than one sample per slot is performed, the first value will be stored. All other  
samples are discarded.  
If more than one sample per slot is performed, the last value will be stored. All other  
samples are discarded.  
Last sample  
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CHAPTER 4  
46  
Performing Advanced Functions  
Following notification types can be returned when issuing the  
RNTTLcommand:  
Value  
00  
Notification Type  
Notify On Positive Threshold.  
Notify On Negative Threshold.  
Notify if Out of Limits.  
01  
10  
11  
Notify if Inside the Limits.  
RETURNS  
REMARKS  
The return result depends on the control byte (see table). However,  
whatever the return result is, it includes the control byte.  
The general behavior is that an ANLG command issued on a cer-  
tain input channel will override any previous ANLGcommands  
affecting that channel.  
REMOTE  
EXAMPLE  
The A723 device cannot issue ANLGcommands remotely, but can  
execute them.  
For RSM  
ANLG 0  
9999 ANLG 0 5 5 5 5 5 5 5 5 4 4 5 5 0  
#
For SSMAA (on channel 4)  
ANLG 68  
9999 ANLG 68 0  
#
For DAN (on channel 0)  
ANLG 160  
9999 ANLG 160 0  
#
For RNTTL (on channel 2)  
ANLG 178  
9999 ANLG 178 340 3900 0  
#
For ENOPTR (on channel 10)  
ANLG 202 1000  
9999 ANLG 202 0  
#
COMMAND  
PORT  
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CHAPTER 4 47  
Using terminal commands  
APPLIES TO  
A720B and A723, but see also the comments in Remote” on  
page 49.  
DESCRIPTION  
PARAMETERS  
A complex command acting upon the I/O ports of a device.  
command is acting on, and two 16-bit parameters, depending on  
the control byte; for some commands, one or both of them may be  
missing. However, if they are needed for a certain command but  
not given, null values are implied.  
The control bytes significance is shown in Figure 14.  
Command Code  
Port Number  
Figure 14. Control Byte Layout  
The Port Number selects a the port that will be affected by  
the command. For the A720/A723, only 0000 and 0001 are  
accepted.  
The Command Code species the operation that will be  
applied to the selected port.  
Table 5 shows the command codes definitions.  
Table 5. Command Code Definitions  
Code  
0000  
Description  
Parameters  
Returns  
RDP – Read Data Port. This command reads the None  
whole 16-bit port and returns its value; the Port  
Number has no significance for this command.  
A 16-bit integer and the  
result (OK or ERROR).  
0001  
RDDR – Read Data Direction Register. This com- None  
mand reads the whole 16-bit Data Direction  
Register and returns its value; the Port Number  
has no significance for this command.  
A 16-bit integer and the  
result (OK or ERROR).  
0010  
0011  
CAI – Configure the port specified by Port Num- The port number.  
ber as input (acts upon the Data Direction Regis-  
ter).  
Result (OK or ERROR).  
Result (OK or ERROR).  
CAO – Configure the port specified by Port  
Number as output (acts upon the Data Direction  
Register).  
The port number.  
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CHAPTER 4  
48  
Performing Advanced Functions  
Table 5. Command Code Definitions (Continued)  
Code  
0100  
Description  
Parameters  
Returns  
RBV – Read the specified bit.  
The port number.  
Bit value and the result  
(OK or ERROR).  
a
0101  
The port number.  
Returns the time of the  
last port change in stan-  
dard time format and the  
result (OK or ERROR).  
RNS – Read the notification status. If no notifi-  
cation was pending, this command should  
return an error. If one was pending, the notifica-  
tion is cleared.  
0110  
0111  
1000  
DNOPC – Disable Notify On Port Change.  
ENOPC – Enable Notify On Port Change.  
The port number.  
The port number.  
None.  
Result (OK or ERROR).  
Result (OK or ERROR).  
RPNNER – Read the Pending Notifications and  
the Notification Enable Register. This command  
returns the 16-bit Pending Notifications and the  
Notification Enable Registers; the Port Number  
has no significance for this command.  
Two 16-bit integers (first  
the PN and then the NE  
register) and the result  
(OK or ERROR).  
1001  
1010  
1011  
1100  
CB – Clear the specified bit.  
SB – Set the specified bit.  
The port number.  
The port number.  
The port number.  
Result (OK or ERROR).  
Result (OK or ERROR).  
Result (OK or ERROR).  
Result (OK or ERROR)  
XB – Exclusive Or the specified bit.  
MFR – Monostable function, start with the speci- The port number,  
fied bit in OFF state (reset).  
the OFF and the  
ON times (in sec-  
onds), both as 16-  
bit integers.  
1101  
1110  
1111  
MFS – Monostable function, start with the speci- The port number,  
Result (OK or ERROR).  
Result (OK or ERROR).  
Result (OK or ERROR).  
fied bit in ON state (set).  
the OFF and the  
ON times (in sec-  
onds), both as 16-  
bit integers.  
MVFR – Multivibrator function, start with the  
specified bit in OFF state (reset).  
The port number,  
the OFF and the  
ON times (in sec-  
onds), both as 16-  
bit integers.  
MVFS – Multivibrator function, start with the  
specified bit in ON state (set).  
The port number,  
the OFF and the  
ON times (in sec-  
onds), both as 16-  
bit integers.  
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CHAPTER 4 49  
Using terminal commands  
a. See also “Notifications” on page 53.  
RETURNS  
REMARKS  
The return result depends on the control byte. However, whatever  
the return result is, it includes the control byte.  
The general behavior is that a PORTcommand issued on a certain  
port bit will override any previous PORTcommands. For example,  
if a port was configured as input and then an MFR (monostable  
function) was issued, the port automatically switches to output. A  
new MFR or similar function clears the status of the port and starts  
from scratch, even if the previous command was not finished.  
REMOTE  
Yes, for the A720 and A723. If you are using a terminal window for  
the A720, you cannot issue the PORTcommand. If you are using a  
terminal window for the A720B, you can issue a PORTcommand  
remotely for an A720 or A723 RTU, but you cannot issue the com-  
mand for the A720B receiver. In other words, the base station can  
issue a remote command for an RTU, but it cannot issue such a  
command for itself. An RTU cannot issue the command at all, but  
can execute it. An axcpetion is the A723 RTU that accepts this  
commands also over the serial line.  
EXAMPLE  
For RDP:  
6789 PORT 0  
6789 PORT 0 1 0  
#
For RDDR:  
6789 PORT 16  
6789 PORT 16 0 0  
#
For ENOPC:  
6789 PORT 112  
6789 PORT 112 0  
#
For RPNNER:  
6789 PORT 128  
6789 PORT 128 0 1 0  
#
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CHAPTER 4  
50  
Performing Advanced Functions  
For RNS:  
6789 PORT 80  
6789 PORT 7/5/1999 18:34:22 0  
#
COMMAND  
APPLIES TO  
RX  
A720, A720B, A723  
DESCRIPTION  
Switches the unit to permanent receive mode (for tuning pur-  
poses).  
PARAMETERS  
RETURNS  
None.  
Nothing.  
REMARKS  
The system stops, and exits the command only when you press a  
key. This command returns no message.  
REMOTE  
No.  
EXAMPLE  
RX  
193 RX 0  
#
COMMAND  
APPLIES TO  
TX  
A720, A720B, A723  
DESCRIPTION  
PARAMETERS  
Switches the unit to transmit mode (for tuning purposes).  
None (sends an unmodulated carrier), 1 (sends a 1 kHz modulated  
carrier), 0 (sends a 2 kHz modulated carrier) or 5 (sends a mixed 1 +  
2 kHz modulated carrier).  
RETURNS  
REMARKS  
Nothing.  
The system stops, and exits the command only when you press a  
key. This command returns no message.  
REMOTE  
No.  
EXAMPLE  
TX  
193 TX 0  
#
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CHAPTER 4 51  
Using terminal commands  
TX 1  
193 TX 0  
#
TX 5  
193 TX 0  
#
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
B
A720, A723  
Sends a broadcast frame.  
None.  
A data block.  
REMARKS  
After the device sends the broadcast frame, it will listen for  
answers. All valid answers will be listed with their IDs.  
REMOTE  
Yes, but only for the A723. A remote broadcast command instructs  
the remote to issue a broadcast (the remote must support this  
function). A subsequent BLSTcommand retrieves a list of stations  
that the remote heard after issuing the broadcast frame.  
EXAMPLE  
B
6789 B 0  
#234 BA 0  
#7851 BA 0  
15190 B  
15190 B 0  
#
COMMAND  
APPLIES TO  
BLST  
A723  
DESCRIPTION  
Retrieves a list with stations heard after the last broadcast com-  
mand.  
PARAMETERS  
RETURNS  
None.  
A data block.  
None.  
REMARKS  
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CHAPTER 4  
52  
Performing Advanced Functions  
REMOTE  
Yes (the remote must support this function).  
EXAMPLE  
BLST  
6789 BLST 30/8/2001 16:03:41 4  
15190 255 255  
2419 255 201  
10836 247 187  
10805 255 187  
0
#
15190 BLST  
15190 BLST 30/8/2001 16:03:41 6  
15193 255 0  
7852 255 0  
14640 255 0  
2419 255 0  
9476 255 0  
10836 255 0  
0
#
COMMAND  
APPLIES TO  
DESCRIPTION  
PARAMETERS  
RETURNS  
VER  
A720, A720B, A723  
Requests the rmware version of the device.  
None.  
The current version.  
GET only.  
No.  
REMARKS  
REMOTE  
EXAMPLE  
VER  
234 VER 1.3 0  
#
VER  
6789 VER 2.0 0  
#
Note: This command is provided only for compatibility with older  
units. The software may use this command to identify the  
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CHAPTER 4 53  
Notifications  
unit it is communicating with. After detecting that the device  
supports this protocol, the INFOcommand must be used for  
further details.  
Notifications  
Notifications are frames sent asynchronously by devices that are  
otherwise slaves. The notifications are received by a device closest  
to the host and then sent to the host. If the host is not available,  
the receiving device will store the notification and wait until it is  
questioned by the host. At this point, it will inform the host that it  
has a notification. It is then the task of the host to issue a command  
to read the respective notification.  
Before a device can issue a notification, the notification must first  
be enabled. Special frames are used to this end, depending on the  
notification type. If an end device is not able to send a notification  
due to radio propagation or other kind of communication prob-  
lems, it will store the date/time when the notification took place.  
As soon as the communication is re-established, the device will try  
to send the notification again.  
Note: To avoid collisions, the device will wait a random time (up to  
When the device closest to the host receives a notification from a  
remote, it must inform the host about it by sending a break charac-  
ter on the serial line. The host must then issue the command DEV  
in order to see which device has a notification pending (see also  
to the host will wait until first time requested by the host and after  
answering to the host request will re-send a break. This sequence  
will go on as described until the host issues the DEVcommand.  
The following notification is currently defined for the A720 device:  
page 46).  
In addition to this notification, the A723 devices can issue the fol-  
lowing:  
NOTR—Notification On Threshold Reached (see “ANLGon  
page 43)  
The A720B device does not currently recognize notifications.  
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CHAPTER 4  
54  
Performing Advanced Functions  
Returned errors list  
Following are error messages you might get.  
Command line interpreter  
1 — nonexistent command  
2 — command line buffer overow (input line too long)  
3 — internal error  
4 — reserved  
5 — missing or false parameters in command  
6 — operation not implemented  
Device descriptors and storage handler  
10 — device not found (attempt to perform a command on a  
nonexistent device)  
11 — device already exists  
12 — reserved  
13 — no more space for descriptors (too many devices)  
14 — no more records for the specied device  
15 — temporary communication break, no more data (the last  
request was not successful)  
16 — time-out (the handler blocked or is busy)  
17 — internal error  
18 — attempt to insert a reserved device ID number (0 or  
65535)  
Real time clock  
Radio interface  
20 — incorrect time supplied (conversion to time_twas not  
possible)  
30 — error at receive (CRC, etc.)  
31 — unexpected frame received  
32 — wrong length  
33 — reserved  
34 — reserved  
35 — time-out (remote device not responding)  
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CHAPTER 4 55  
Returned errors list  
36 — receiver busy (for example, just making the request  
round)  
Notifications  
40 — request to read a notification when no notification is  
pending  
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CHAPTER 4  
56  
Performing Advanced Functions  
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57  
Appendix. Specifications  
The A720 series was intended to fulfill the specification of the ETSI  
300 220, Class I, Subclasses a and b, but other national norms are  
similar to this (for example, the CFR 47, Part 90, Subpart J). Table 6  
shows the main operational parameters of the A720 series.  
Table 6. Operational Parameters  
Parameter  
Min  
Typ  
Max  
Unit  
Common  
Supply  
5.0  
6.2  
10.0  
V
Operating Temperature  
-30  
10  
+70  
99  
°C  
%
Relative Humidity  
Class Protection  
IP65  
a
Data Rate (using the onboard software modem)  
1000  
432  
2000  
450  
bps  
150  
b
MHz  
MHz  
kHz  
kHz  
Operating Frequency (low band version)  
Operating Frequency (high band version)b  
Frequency Stability (-20 to +60 °C)  
450  
470  
1.5  
2.5  
Frequency Stability (-30 to +70 °C)  
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58  
Table 6. Operational Parameters (Continued)  
Parameter  
Min  
Typ  
Max  
Unit  
Receiver  
Sensitivity (10 db S/N)  
-93 (A720)  
-105(A723)  
dBm  
Image Frequency Attenuation (1st IF = 45 MHz)  
Local Oscillator Leakage  
35  
dB  
2
nW  
dB  
Adjacent Channel Attenuation (both versions)  
RSSI Dynamic  
55  
90  
dB  
c
15  
mA  
Operating Current (incl. onboard microcontroller)  
Transmitter (all measurements made on a 50 resistive load)  
Output Power  
7
9
10  
dBm  
nW  
nW  
dBm  
dBm  
kHz  
kHz  
mA  
Spurious Radiation (0 to 862 MHz)  
Spurious Radiation (862 MHz to 3.5 GHz)  
Adjacent Channel Power (12.5 kHz version)  
Adjacent Channel Power (25 kHz version)  
Occupied Bandwidth (12.5 kHz version)  
Occupied Bandwidth (25 kHz version)  
Operating Current (incl. onboard microcontroller)  
A720/A723 only  
2
200  
-32  
-44  
8.5  
15  
50  
Analog Inputs  
0
2.5  
V
Analog to Digital Converter Resolution  
8 (A720)  
10 (A723)  
bits  
Digital Inputs V  
0.5  
1.5  
V
il  
Digital Inputs Vih  
2.5  
V
d
Hz  
bits  
Pulse Counter Input Frequency  
Pulse Counter Resolution  
8 (A720)  
16 (A723)  
Digital Outputs Sink/Source  
Digital Outputs Vol  
2
mA  
V
0.3  
Digital Outputs Voh  
2.9  
V
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CHAPTER 59  
a. Data rate is content dependent.  
b. This parameter represents the tuning range; the switching range may be limited in  
the software to a narrower space (even to the extent of a single channel).  
c. Continuous duty.  
d. Electrical levels are the same as for the Digital Inputs.  
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CHAPTER  
60  
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61  
Index  
BLST, 51  
A
A720 description, 5  
A720B description, 5  
about the LED, 16  
ANLG, 43  
C
changing the battery, 19  
CMDS, 30  
ANLG, 43  
B
answer format, 25  
B
B
series 1, 30  
series 2, 51  
BLST, 51  
CMDS, 30  
DATA, 36  
DEL, 36  
series 1, 30  
series 2, 51  
base station  
composition, 9  
graphic, 12  
installation issues, 10  
packaging, 9  
battery  
DEV, 35  
DUMP, 29  
FDEV, 41  
format, 25  
FREQ  
series 1, 28  
series 2, 31  
ID, 32  
changing, 19  
description, 17  
operation, 18  
IMME, 40  
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62 INDEX  
INFO, 41  
OWNID, 26  
PMP  
descriptors and storage handler errors, 54  
determining version, 22  
operation time, 18  
series 1, 27  
series 2, 33  
document conventions, 7  
DUMP, 29  
PORT, 46  
query parameters, 29  
REPL, 35  
ROUTE, 40  
E
command line interpreter, 54  
device descriptors and storage handler,  
54  
radio interface, 54  
RSSI  
series 1, 28  
series 2, 31  
RX  
series 1, 29  
series 2, 50  
SLOT  
series 1, 27  
series 2, 32  
SST, 34  
TIME, 30  
FDEV, 41  
TX, 50  
VER  
series 1, 28  
series 2, 31  
series 1, 29  
series 2, 52  
XMIT, 29  
ID, 32  
IMME, 40  
INFO, 41  
install  
command line interpreter errors, 54  
configuring  
devices, 24  
power supply, 1112  
receiver, 11  
RTU, 14  
connectivity check, 14  
connector  
installation issues, 6  
definition, 22  
receiver, 22  
RTU, 23  
L
LED  
D
definition, 14  
usage, 16  
DATA, 36  
DEL, 36  
DEV, 35  
device  
configuration, 24  
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REPL, 35  
ROUTE, 40  
M
maintaining the RTU, 17  
N
NOPC, 53  
notification  
definition, 53  
NOPC, 53  
RSSI  
series 1, 28  
series 2, 31  
connector, 23  
field installation, 15  
graphic, 14  
installing, 14  
mainenance, 17  
packaging, 13  
use, 13  
O
overview, 5  
OWNID, 26  
P
series 1, 29  
series 2, 50  
packaging  
base station, 9  
RTU, 13  
performing a connectivity check, 14  
PMP  
series 1, 27  
series 2, 33  
PORT, 46  
power supply  
graphic, 11  
series 1, 27  
series 2, 32  
SST, 34  
installing, 1112  
T
TIME, 30  
TX, 50  
Q
querying command parameters, 29  
R
radio interface errors, 54  
real time clock errors, 54  
receiver  
RTU, 13  
connector, 22  
graphic, 10  
installing, 11  
V
VER  
series 1, 29  
series 2, 52  
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64 INDEX  
W
what a base station contains, 9  
X
XMIT, 29  
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65  
Credits and Colophon  
Credits  
Development  
Günther Leber, Lix N. Paulian, Florin Wacykiewcz, Matthias Wallner.  
Documentation and artwork  
Dimi Everette, Stefan Hasegan, Lix N. Paulian.  
Quality control and testing  
Steve Grove, Martin Hackl, Bernd Hartmann, Günther Leber, Lix N.  
Paulian, Matthias Wallner.  
Colophon  
This manual was written and produced with Adobe FrameMaker  
on the MacOS platform. The illustrations were done or prepared in  
Adobe Illustrator and Adobe Photoshop on a Power Macintosh.  
Some illustrations were done in Corel Draw! on Microsoft Win-  
dows. The electronic version was created with Adobe Distiller on a  
Power Macintosh.  
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