COM220 Telephone Modem
Revision: 3/07
C o p y r i g h t
©
1 9 9 7 - 2 0 0 7
C a m p b e l l S c i e n t i f i c , I n c .
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COM220 Telephone Modem
Table of Contents
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1. Introduction..................................................................1
1.1 General Description..................................................................................1
1.2 Computer Requirements ...........................................................................2
2. Specifications ..............................................................3
3. Installation....................................................................3
3.1 Connecting to Datalogger.........................................................................3
3.2 Connecting to Earth Ground.....................................................................4
3.3 Telephone to MD485 or Telephone to RF Systems..................................4
3.4 Telephone Service ....................................................................................4
4. Modem Settings...........................................................6
5. Troubleshooting ..........................................................7
Appendices
A. Changing COM220 Settings................................... A-1
A.1 DIP Switch Settings............................................................................ A-1
A.2 Hayes AT Commands......................................................................... A-2
A.3 Downloading a New Operating System to the COM220.................... A-6
A.4 Program Examples.............................................................................. A-7
A.4.1 ModemCallback Example (for CR1000) .................................. A-7
A.4.2 DialModem Example (for CR1000).......................................... A-8
A.4.3 P97 Instruction (for CR10X)..................................................... A-9
A.4.4 Example Programs for Data-Callbacks via a CR1000
Datalogger Router .............................................................. A-11
B. CS I/O Connection................................................... B-1
B.1 CS I/O 9 Pin Connection......................................................................B-1
C. Theory of Operation................................................C-1
C.1 Theory of Operation.............................................................................C-1
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COM220 Telephone Modem Table of Contents
D. FCC Warning to Users of
Class A Computing Devices..............................D-1
E. IC Information ..........................................................E-1
List of Figures
1. COM220 DIP Switches.............................................................................. 1
2. COM220 .................................................................................................... 2
3. CR1000 and COM220 Using Remote Telephone Line ............................. 5
4. CR10X with CR10 Wiring Panel and COM220 Using RJ11C
Telephone Jack ....................................................................................... 6
A-1. COM220 to Computer Connection.................................................... A-3
A-2. Device Configuration Screen............................................................. A-4
A-3. Terminal Emulator Screen in Device Configuration ......................... A-5
A-4. Send OS Screen in Device Configuration.......................................... A-7
B-1. CS I/O Pin Out................................................................................... B-1
List of Tables
1. Dataloggers that Require Direct 12 VDC Connection to COM220........... 4
A-1. Selecting ME Baud-rates via DIP Switches 3 and 4.......................... A-2
A-2. Maximum Datalogger ME Baud-rate ................................................ A-2
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COM220 Telephone Modem
1. Introduction
1.1 General Description
The COM220 modem is a selectable-baud-rate modem employing the Hayes
AT command set. Its primary use is as a remote site phone modem connected
to a CSI datalogger. The modem is powered and enabled by the battery-
powered datalogger. When not active, the COM220 draws 100 to 120 µA
from the datalogger’s 12 VDC output. During a call, it draws about 30 mA.
The COM220 is a replacement for the COM210. However, the COM220
supports both synchronous device communication (SDC) and modem enable
(ME) communication, as well as various ME baud rates (9600 to 115200).
The default settings for the COM220 at shipping are SDC7, and PakBus ready
(see Appendix A for details).
IMPORTANT
The default settings ARE NOT compatible with dataloggers
that have non-PakBus operating systems (e.g., CR510,
CR10X, CR23X, CR7, CR5000). However, compatibility
with non-PakBus dataloggers is easily achieved by
changing DIP switch settings (Figure 1). If you want to use
the COM220 as a drop-in replacement for the COM210,
the COM220 settings should be changed to modem enable
(DIP switch 1 open), and 9600 baud (DIP switches 3 and 4
open). In addition, DIP switch 5 must be closed for
connection to non-PakBus dataloggers. Instructions for
configuring the COM220 are described in Appendix A.
FIGURE 1. COM220 DIP Switches. Five Screws and the Outer Cover
Must be Removed for Access to the DIP Switches.
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COM220 Telephone Modem
The COM220 is connected to a CSI datalogger by a 9-pin subminiature D
cable. This is the same 9-pin CS I/O interface common to all Campbell
Scientific dataloggers (except the CR200 series). This is not an RS-232
connection. Appendix B describes the CS I/O interface.
The COM220 can be used as an originate modem at the datalogger site. For
non-Pakbus dataloggers (e.g., CR510, CR10X, CR23X), and for older PakBus
dataloggers (e.g. CR10XPB, CR23XPB, CR510PB) use Instruction 97 to
program the datalogger to originate a call to the computer; refer to your
datalogger manual for a detailed description of Instruction 97. For newer
Pakbus dataloggers (e.g., CR800, CR1000, CR3000) use the ModemCallback
instruction or the DialSequence and DialModem instructions to program the
datalogger to originate a call to the computer. Again, refer to your datalogger
manual and LoggerNet Help files for detailed descriptions of these
instructions. In addition, Appendix A.4 includes sample programs for the P97,
ModemCallback, and DialModem instructions.
The COM220 features a built-in speaker to allow monitoring of calling and
connection. See Appendix A.2 for the Hayes AT commands that affect the
speaker on/off and volume settings.
FIGURE 2. COM220
1.2 Computer Requirements
A Hayes-compatible modem is used at the computer site with Campbell
Scientific computer software to call the datalogger attached to the COM220.
The computer’s modem must be configured to the proper settings using a set of
modem initialization strings in the software program’s pick list.
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COM220 Telephone Modem
2. Specifications
•
Standards: V.92, K56Flex, V.90, V.34, V.32bis, V32, V23, V22bis, V22,
V.21, B212, B103
•
Registration:
FCC US: 3A4M508BSM2-T-W
IC 2377 A-SM2TW
TBR21
•
•
•
Operating voltage: 12 VDC
Current drain: 100 to 120 µA quiescent; 30 mA active
Communication rate between datalogger and COM220: 9600, 38400,
57600, 115200 bps (selected by user)
•
•
•
•
Operation: Full-duplex over standard analog phone lines
Operating temperature: -25° to +50°C std, -55° to +85°C optional
Dimensions: 6.5” x 1.0” x 2.6” (16.5 x 2.5 x 6.6 cm)
Weight: 0.35 lbs (0.16 kg)
3. Installation
The COM220 is designed to be used with standard analog telephone lines. It
will not work with a digital telephone line. Connection to telephone-company-
provided coin service (central office implemented systems) is prohibited.
Connection to party line service is subject to state tariffs.
3.1 Connecting to Datalogger
Connect the cable from the telephone RJ11C jack to the modem as shown in
Figure 4. If the telephone company has not installed surge protection in the
telephone line (no RJ11C jack), one must install surge protection (CSI item
number 6362 or 4330) and connect the ring and tip terminal blocks as shown
in Figure 3.
Current Campbell Scientific dataloggers provide 12 VDC to the COM220 from
the CS I/O port via the SC12 cable (Figure 2). Older dataloggers do not
provide 12 VDC on their CS I/O port. When used with the older dataloggers
listed in Table1, 12 VDC and ground need to be connected via the green power
connector on the side of the COM220 (see Figure 4).
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COM220 Telephone Modem
TABLE 1. Dataloggers that Require Direct
12 VDC Connection to COM220
CR10(X) with silver wiring panel
CR10(X) with black CR10 wiring panel (P/N
8032)
21X(L)—serial number 13,442 or lower
CR500⎯serial number 1764 or lower
CR7—700X serial number 2778 or lower
3.2 Connecting to Earth Ground
Connect the green 14 awg grounding wire (provided with the COM220) to the
ground terminal (GND) on the COM220 and to the enclosure’s earth ground
connection. If the site does not have a grounded enclosure, then connect the
ground wire directly to an earth ground connection. The datalogger ground
should also be tied to the earth ground.
The modem must be grounded for its transient protection
to work.
CAUTION
3.3 Telephone to MD485 or Telephone to RF Systems
Telephone to MD485 or telephone to radio configurations can be utilized for
communicating with multiple dataloggers through one telephone line. For
telephone to MD485 or telephone to radio communications (with no datalogger
router), the COM220 should be set for ME mode. The COM220 and MD485
should be set to the same baud rate. When using a PakBus network with a
datalogger configured as a router, the COM220 can be set for SDC7 and the
radio for SDC8, or vice versa. Contact a Campbell Scientific Applications
Engineer for more information. In addition, Appendix A.4.4 includes example
programs for both a router datalogger and a remoter datalogger communicating
by telephone to MD485 or telephone to radio.
3.4 Telephone Service
The goal of the telephone company is to provide you with the best service it
can. In order to do this, it may occasionally be necessary for them to make
changes in their equipment, operations, or procedures. If you have any
questions about your telephone line, such as how many pieces of equipment you
can connect to it, the telephone company will provide this information upon
request. If the telephone company requests information concerning the
equipment which you have connected to your telephone line, the FCC
registration number and the ringer equivalence number (REN) of the COM220
are listed on its label. Additional technical information from the FCC and IC on
the COM220 is available in Appendices D and E, respectively.
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COM220 Telephone Modem
PN
G
12V
SE
DIFF
1
2
L
3
4
L
5
6
L
7
8
L
1
2
3
4
H
H
H
H
CAUTION
DC ONLY
G
12V
GROUND
LUG
CR1000
SE
DIFF
9
10
L
11 12
6
13 14
7
15 16
8
WIRING PANEL
5
H
H
L
H
L
H
L
RS-232 (Not Isolated)
POWER OUT
COM1 COM2
Tx Rx Tx Rx
COM3 COM4
Tx Rx Tx Rx
CS I/O
PERIPHERAL PORT
MADE IN USA
SDM
SC12 Cable
Blue = Ring
Burial Phone Cable
Earth
Ground
Blue/White = Tip
Phone Line
Transient Protector
(Model 6362 or 2372-01)
FIGURE 3. CR1000 and COM220 Using Remote Telephone Line
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COM220 Telephone Modem
12V 12V
DIFF AG
SE
H
7
L
8
AG
H
9
L
AG
H
L
AG E3 AG
G
G
G
G
G
G
G
12V
SERIAL I/O
4
5
6
POWER
IN
10
11 12
SWITCHED
12V
CAMPBELL
SCIENTIFIC
INC.
CR10
MADE IN USA
WIRING PANEL NO.
SWITCHED
12V
SE
1
2
3
4
L
5
6
L
CONTROL
EARTH
1
2
3
AG
H
L
AG
H
AG
H
AG E1 E2
G
G
G
5V 5V P1 P2
C8 C7 C6 C5 C4 C3 C2 C1
DIFF
To Earth
Ground
Red
(+12v)
Black
(Ground)
14 AWG Ground Wire
SC12 Cable
Telephone Wall
Jack
FIGURE 4. CR10X with CR10 Wiring Panel and COM220 Using RJ11C Telephone Jack
4. Modem Settings
The COM220 comes from the factory with the appropriate settings for PakBus
dataloggers (e.g., CR8x0, CR1000, CR3000, CR10XPB, CR23XPB). It is
programmed to answer a call as soon as a call is detected. It is also
programmed for Synchronous Device Communication (SDC7). As mentioned
in the introduction, these settings must be modified in order to connect to older
dataloggers (e.g. CR510, CR10X, CR23X, CR7) with non-PakBus operating
systems.
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COM220 Telephone Modem
You can modify the following COM220 settings with DIP switches:
1) Communication mode (e.g., SDC or Modem Enable)
2) ME baud rate
3) PakBus ready
Additional changes (see examples below) may be modified with Hayes AT
commands. Appendix A.2 describes the procedures and commands required to
effect the changes described in this section.
Some of the AT command settings one may change are:
Disable auto-answer: This option is used only when the modem is not to
answer a call. For example, the COM220 is connected to a telephone line that
is to be used part time for voice communication. In this situation it is best to
have the datalogger call the computer.
Speaker On/Off and Volume: Default settings have the speaker on only
during call establishment and set to a low volume. The speaker may be turned
completely off in order to limit the current drain during the connection or so
you don’t hear the speaker. It is also possible to set the speaker volume higher,
if you want to hear the speaker better than the default low volume setting.
Answer on Xth ring: This option is used when the modem is sharing a line
and you only want it to answer after a specified number of rings. For example,
the COM220 is sharing a line with people at an office. It can be programmed
to only answer after the third ring. If the PC calls when the office is closed and
no one answers the phone after three rings, the datalogger will pick it up.
Change telephone system types: Change from the Bell 212A (U.S. and
Canada) system to a CCITT V.32 (foreign, 9600 baud) or CCITT V.22
(foreign, 1200 baud) system. This does not mean that the COM220 is tested
and approved for all foreign countries.
CITT is an international consultative committee that sets international
communications usage standards. V.32 and V.22 are CCITT standards that the
COM220 meets.
5. Troubleshooting
When the Campbell Scientific software cannot establish a link to a remote
datalogger that is connected to a COM220, check the following:
1) Verify that the modem initialization settings on your computer are correct
for your specific calling modem (i.e., the modem attached to your
computer). See the calling modem’s software manual and/or help screens
for more information.
2) If using a non-PakBus datalogger (e.g., CR510, CR10X, CR23X, CR7,
CR5000 with array-based operating system), verify that DIP switch 5 on
the COM220 is in the CLOSED position. For PakBus dataloggers (e.g.,
CR800, CR850, CR1000, CR3000, CR10XPB, CR23XPB, CR510PB),
DIP switch 5 should be open. See Appendix A.1 for details.
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COM220 Telephone Modem
3) If using a non-PakBus datalogger (e.g., CR510, CR10X, CR23X, CR7,
CR5000), verify that DIP switch 1 on the COM220 is in the OPEN
(modem enable) position. For PakBus loggers (e.g., CR800, CR850,
CR1000, CR3000, CR10XPB, 23XPB, etc.), DIP switch 1 can be in either
position, but closed (SDC7) is preferred. See Appendix A.1 for details.
4) If the COM220 is set for Modem Enable (DIP switch 1 open), verify that
the ME baud rate selected (switches 3, 4) agrees with related
communication instructions in the datalogger program. Instructions for
setting the COM220’s ME baud rate are found in Appendix A.1.
5) If the COM220 is set for Modem Enable (DIP switch 1 open) and you are
unable to connect to the datalogger, try setting the datalogger BaudrateME
to a negative number (e.g. -9600) in order to enable auto-bauding in the
datalogger. If the datalogger BaudrateME is positive (due to an earlier
program instruction or Status Table configuration) the datalogger will be
unable to communicate with the COM220 unless baud rates happen to
match. A good rule of thumb is to keep baud rates negative (-) in
programs and when configuring the Status Table to allow datalogger
auto-bauding.
6) If unable to connect to a datalogger via the COM220, make sure that the
datalogger is not beaconing to the same port for which the COM220 is
configured (e.g., if the COM220 is configured for SDC7 and the
datalogger's BeaconSDC7 is set to something other than 0, then a
connection cannot be established).
7) If the COM220 is in Modem Enable mode, verify that the COM220 is the
only Modem Enable device connected to the datalogger. Other common
Campbell Scientific modem enable devices are the SC32B, some RF
modems, the MD485, the RF401, the SC932A, and the PDA-to-CS I/O
connector.
8) If the COM220 is in SDC mode (the default is SDC7, with DIP switch 1
closed and DIP switch 2 open), verify that any other SDC devices attached
to the datalogger are using a different SDC address (e.g., if the COM220
is configured for SDC7, another SDC device attached to the datalogger
must use SDC8).
9) Verify that no other software application is currently using the same COM
port on the computer. Even if a program is minimized in windows, it may
put a lock on a COM port. Some notebook computers do not
automatically activate the COM ports. Verify that the COM port you are
using is activated.
10) Use the Low Level Log in the Campbell Scientific software, LoggerNet,
[under Status Monitor, Tools, Log Tool, Options, View Low Level Log
(I/O)] to see connection progress as a link is being established. Assuming
the above items are O.K., the Low Level Log will display
“ATDT#######”. Where #### is the phone number entered in LoggerNet
Setup’s Phone Remote for the datalogger you are trying to call. The
modem attached to the computer will respond back to the computer with
result codes showing how the call is progressing. These responses should
include “RING” and “CONNECT ####” where #### is the negotiated
modem-to-modem connection baud rate. The maximum baud rate setting
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COM220 Telephone Modem
in Setup’s PakBusPort [LoggerNet, Setup, PakBusPort (in the device
map)] may limit the baud rate selected by the modems since it defaults to
9600. You can sometimes achieve a higher connection baud rate by
raising the PaKBus Port’s maximum baud rate.
11) Can you attach a normal analog telephone to the line and make a call out?
If not, contact your local telephone company. If you can make a call out
but the connection is poor or faint, contact your local telephone company.
12) Verify the COM220 is receiving 12 VDC. If the COM220 is receiving 12
VDC from a separate power supply instead of the datalogger, is the ground
of the separate power supply connected to the datalogger’s ground?
13) Verify the datalogger is turned on.
To comply with FCC rules and regulations, all repairs on the COM220 modem
must be performed by Campbell Scientific, Inc. or an authorized agent of
Campbell Scientific, Inc. For assistance in installation, troubleshooting, or for
repair, contact Campbell Scientific:
Campbell Scientific, Inc.
815 West 1800 North
Logan, Utah 84321-1784
Telephone: (435) 753-2342
Fax: (435) 750-9540
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COM220 Telephone Modem
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Appendix A. Changing COM220
Settings
Changing any of the modem's settings may result in
communication problems. After changing the settings, try
the modem locally before installing it at a remote location.
To speed problem resolution when contacting Campbell
Scientific for support, please inform us of any modem
setting changes that have been made.
CAUTION
A.1 DIP Switch Settings
The following COM220 settings are changed by opening or closing DIP
switches:
1) Communication mode, either Synchronous Device Communication (SDC)
or Modem Enable (ME)
2) ME baud-rate
3) PakBus ready.
To change DIP switch settings, the outer cover must first be removed by
unscrewing and removing the five Philips head screws on the cover.
IMPORTANT
It is necessary to cycle power to the COM220 for changes
to the DIP switch settings to take effect. This is done by
removing the 9 pin connector for about 5 seconds. As with
other devices, if you leave the power off for too short a
time, you may get unexpected results.
DIP Switches 1 and 2: SDC or Modem Enable
The COM220 supports Synchronous Device Communication (SDC) and
Modem Enable (ME) communication. Switch 1 selects between SDC and ME.
If switch 1 is open, ME mode is selected. If switch 1 is closed and switch 2 is
open (default), SDC7 is selected. If both switch 1 and 2 are closed, SDC8 is
selected. SDC is not supported by non-Pakbus operating systems (e.g.,
CR10X, CR23X, CR7, CR510). Hence, to connect with these older
dataloggers, switch 1 must be open (i.e., Modem Enable mode selected).
DIP Switches 3 and 4: ME Baud-rates
DIP switches 3 and 4 only have effect when the COM220 is in Modem Enable
mode. If the COM220 is in ME mode, switches 3 and 4 select the baud-rate
setting between the COM220 and the datalogger as follows:
A-1
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Appendix A. Changing COM220 Settings
TABLE A-1. Selecting ME
Baud-rates via DIP Switches 3 and 4
ME Baud-rate Switch 3 Switch 4
9600
38400
57600
115200
Open
Open
Closed
Closed
Open
Closed
Open
Closed
Please note that older dataloggers (e.g. CR10X, CR23X, CR510) cannot
support the highest COM220 ME baud-rates. Table A-2 lists maximum
datalogger baud-rates.
TABLE A-2. Maximum Datalogger ME Baud-rates
Datalogger
CR10X, CR510, CR7, CR21X
CR23X
Max Baud-rate
9600
38400
CR5000
57600
CR800, CR1000, CR3000
115200
DIP Switch 5: PakBus Ready
Switch 5 should be open (default) for PakBus dataloggers (e.g., CR800,
CR1000, CR3000, CR10XPB, CR23XPB, CR510PB), but must be closed for
non-Pakbus dataloggers (e.g., CR10X, CR23X, CR510, CR5000). This switch
determines if the clock/handshake line is used to detect the ME-PAUSE state.
DIP Switches 6 and 7: Not used
DIP Switch 8: Configuration Mode
Closing DIP switch 8 (and cycling power to the COM220) places the COM220
in configuration mode. The COM220 can be configured using an SC532 or an
SC532A with a 12V AC adapter (part number 15966) and Device
Configuration utility ver 1.6 or newer and Hayes AT Commands (see below).
A.2 Hayes AT Commands
In order to configure the COM220 with Hayes AT commands, you will need
the Campbell Scientific Device Configuration utility ver 1.6 or newer and a
SC532 or SC532A device. An SC12 cable must be connected to the peripheral
port on the SC532 or SC532A and the CS I/O port on the COM220. Another
cable should connect the “RS232” port (if using an SC532 device) or the “PC”
port (if using an SC532A device) to one of your computer's serial ports. If
using an SC532A device, power will be provided to the modem by the SC532A
with a 12V AC adapter (Figure A-1). However, if using the older SC532, you
must apply 12 V to the COM220 via the green connector.
A-2
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Appendix A. Changing COM220 Settings
FIGURE A-1. COM220 to Computer Connection
To configure the COM220 with Hayes AT commands, follow these steps:
1) Close DIP Switch 8 on the COM220 (power to the COM220 must be
cycled for ~ 5 sec before changes to DIP switch settings are effective).
2) You must use an SC532A with a 12V AC adapter or an SC532 interface to
communicate with the modem. Connect the “PC” port (called “RS232” on
the SC532) to a serial port on your computer via an RS232 cable. Leave
the COM220 modem disconnected for now.
3) Run Device Configuration ver 1.6 utility or newer.
4) Select Com220 from the Device Configuration utility menu (Figure A-2).
5) Make sure the appropriate serial port is selected on the left panel of the
Device Configuration utility window and click on the connect button.
6) Once you have clicked on the connect button, connect the peripheral port
on the SC532(A) or SC532 to the CS I/O port on the modem with a SC12
cable. If using a SC532, you will also have to apply 12V to the COM220
via a green connector attached to a power supply. If using an SC532A
device, power will be provided to the modem by the SC532A (NOTE: you
must click on the connect button BEFORE applying power to the
COM220).
A-3
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Appendix A. Changing COM220 Settings
7) Follow the instructions that appear in the terminal emulator screen (Figure
A-3).
8) Be sure to save all new commands before exiting (by entering 5 and enter).
9) When finished, return DIP switch 8 on the COM220 to its open position.
FIGURE A-2. Device Configuration Screen
A-4
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Appendix A. Changing COM220 Settings
FIGURE A-3. Terminal Emulator Screen in Device Configuration
HAYES AT COMMAND SUMMARY:
This manual does not attempt to be a primer on the Hayes AT command set.
The commands are, therefore, only summarized below. For most applications,
these commands will not need to be used. Except as noted, all commands
should begin with an “AT” and end with a carriage return (hit the [Enter] key).
There are no “O” as in Oscar commands, only “0” as in Zero commands. For
example, to change the default number of rings from 1 to 3, the command is:
ATS0=2 (the default is 1 ring as the MPU sends ATS0=1 by default to the
modem module).
To turn the speaker off, the command is: ATM0
Note, for command changes to be effective, you MUST hit enter after typing
the command and you MUST hit 5 to save the new command before
disconnecting or exiting set up.
COMMANDS TO CHANGE DEFAULT MODES:
B1 (default) CCITT V.32 (9600 baud), Bell 212A (1200 baud), and Bell
103 (300 baud)
B0
CCITT V.32 (9600 baud), CCITT V.22 (1200 baud), and
CCITT V.21 (300 baud)
L0
Lowest speaker volume
Low speaker volume
Medium speaker volume
High speaker volume
L1 (default)
L2
L3
A-5
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Appendix A. Changing COM220 Settings
M0
Speaker always off
M1 (default) Speaker on during call establishment
M2
Speak on during entire call session
Disable Auto Answer
S0=0
S0=1 (default) Answer on second ring
S0=2
S0=n
Answer on third ring
Answer on (n + 1) ring.
When doing datalogger to datalogger communications with
the COM220, if more than six rings are specified, the
datalogger may time out before the modem answers;
communication will never be established! Be sure to try
the set up locally before installing at a remote location.
CAUTION
A.3 Downloading a New Operating System to the
COM220
To download a new operating system to the COM220, follow these steps:
1) You must use an SC532A or an SC532 interface to communicate with the
modem. Connect the PC port (called “RS232” on the SC532) to a serial
port on your computer via an RS232 cable. Leave the modem
disconnected for now.
2) Make sure that you have the appropriate serial port selected in the left
panel of the Device Configuration Utility window.
3) Click on the Start button.
4) In the resulting file open dialogue box that appears, select the file that
should be sent as the modem's operating system. Do not attempt to load
any operating system other than that designed for the COM220
modem.
5) Once you have pressed OK in the file open dialogue box, connect the
peripheral port on the SC532(A) or SC532 to the CS I/O port on the
modem with an SC12 cable. If using an SC532, you will also have to
apply 12 V to the COM220 via a green connector attached to a power
supply. If using an SC532A device, power will be provided to the modem
by the 12 V adapter connected to the SC532A (NOTE: you must
highlight/select the operating system file to be sent BEFORE applying
power to the COM220).
6) The program should now send the operating system to the modem.
Interrupting this process may corrupt the modem operating system.
A-6
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Appendix A. Changing COM220 Settings
FIGURE A-4. Send OS Screen in Device Configuration
A.4 Program Examples
A.4.1 ModemCallback Example (for CR1000)
The ModemCallBack instruction is available in the CR1000 with operating
system std.12 or greater, in the CR3000 with operating system std.05 or greater
and CR800 or CR850 with operating system std.03 or greater. The following
program uses the ModemCallBack instruction to call LoggerNet every 2
minutes. The ModemCallBack instruction assumes that LoggerNet resides at
the phone number and that callback is enabled in LoggerNet Setup, both for
the comport and for the datalogger.
Public PTemp, batt_volt, Count, Result as Long
Const Abort = 0 ' False
DataTable (Test5,1,-1)
DataInterval (0,0,Sec,10)
Sample (1,batt_volt,FP2)
Minimum (1,batt_volt,FP2,0,False)
Maximum (1,batt_volt,FP2,False,False)
Sample (1,PTemp,FP2)
Minimum (1,PTemp,FP2,0,False)
Maximum (1,PTemp,FP2,False,False)
Sample (1,Count,FP2)
EndTable
BeginProg
Scan (2,Min,3,0)
Count = Count + 1
PanelTemp (PTemp,250)
Battery (Batt_volt)
A-7
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Appendix A. Changing COM220 Settings
ModemCallBack(Result,ComSDC7,9600,0,"5551212","",40,60,Abort)
CallTable Test5
NextScan
End Program
A.4.2 DialModem Example (for CR1000)
The program below does 2-minute callbacks via the COM220 configured for
SDC7. DialModem is set equal to a variable, so that the success/failure result
can be used by the EndDialSequence instruction. If the call fails, the link will
be terminated at the EndDialSequence instruction. If the call is successful, the
device will be kept on-line until the SendVariables command is completed.
Note, that for data callbacks to occur, callback enable must be selected in
LoggerNet Setup both for the comport and for the datalogger.
'Replace DialModem phone number with your PC's phone number
Public batt_volt, Result
Public PTemp, TCvalue_F, dummy
Public RespStrng, DialSuccess, AccumDialFails as LONG
DataTable (DC1,1,1000)
DataInterval (0,0,Sec,10)
Sample (1,PTemp,FP2)
Sample (1,TCvalue_F,FP2)
Sample (1,DialSuccess,FP2)
EndTable
DialSequence (4094)
'Establishes a phone connection if there isn't one already.
DialSuccess =DialModem (ComSDC7,-115200,"5551212","") ' " Param 2 baudrate setting affects
sdc bit rate." Param 4 allows OS to accept any listed modem response.
If DialSuccess = 0 then AccumDialFails = AccumDialFails + 1
EndDialSequence (DialSuccess) ‘ -1 = success, 0 = failure of response to match Param 4
BeginProg
Scan (2,Min,3,0)
PanelTemp (PTemp,250)
Battery (Batt_volt)
dummy = 0
TCDiff (TCvalue_F,1,mV2_5C,1,TypeT,PTemp,True ,0,250,1.8,32)
SendVariables (Result,ComSDC7,4094,4094,0000,3500,"Public","Callback",dummy,1)
'Establishes static route to LN
'35 sec timeout allows time to dial/train
CallTable DC1
NextScan
EndProg
A-8
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Appendix A. Changing COM220 Settings
The COM220 can return several possible responses once
CAUTION
connected (each terminating in a carriage return):
“1” CONNECT
“5” CONNECT1200
“10” CONNECT2400
“13” CONNECT9600
“18” CONNECT4800
“20” CONNECT7200
“21” CONNECT12000
“25” CONNECT14400
Hence, to work with the COM220, the user must put in a
NULL string, else the DialModem will fail unless by chance
it returns the specific string the user entered. Therefore, it
is highly recommended to use the “” string for the connect
string, unless the user is using some other modem that he
knows has a different response string than those listed
above.
A.4.3 P97 Instruction (for CR10X)
Instruction 97 is a Program Control Instruction that makes the following types
of calls:
•
•
•
Datalogger calls a computer to send data.
Datalogger calls a voice phone using our voice-synthesized modem.
Datalogger calls a remote datalogger to retrieve its input locations.
Instruction 97 has the following parameters:
•
•
•
•
•
•
•
•
Parameter 1 - Modem/Baud-rate Codes
Parameter 2 - Flag No. to Disable P97
Parameter 3 - Call Time Limit (seconds)
Parameter 4 - Seconds Before Fast Attempts
Parameter 5 - Fast Attempts
Parameter 6 - Minutes Before Slow Attempts
Parameter 7 - Failure Location
Parameter 8 - Callback ID
A-9
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Appendix A. Changing COM220 Settings
Do not put Instruction 97 inside a loop or conditional
IMPORTANT
statement; it must be executed each time the table is run.
In the example below, the program does two minute data callbacks via the
COM220 phone modem. Edit instruction 13 with your PC’s (LoggerNet’s)
phone number. Remember to set COM220 DIP switch 5 to “closed”, switch 1
open for Modem Enable mode, and switches 3 and 4 open for 9600 baud. The
callback ID in this example is 222. The callback ID is a user-specified number
and must also be entered in LoggerNet Setup for callbacks to work.
*Table 1 Program
01: 5
Execution Interval (seconds)
; Prevent callback when program Compiled
1: If Flag/Port (P91)
1: 28
2: 30
Do if Flag 8 is Low
Then Do
2: Do (P86)
1: 15
Set Flag 5 High
Set Flag 8 High
3: Do (P86)
1: 18
4: End (P95)
5: Batt Voltage (P10)
1: Loc [ BatVolt ]
1
;measure battery voltage
6: Internal Temperature (P17)
1: Loc [ TEMP_PANL ]
2
;measure panel temperature
7: If time is (P92)
1:
2: 10
3: 10
;final storage every 10 seconds
0
-- Minutes (Seconds --) into a
Interval (same units as above)
Set Output Flag High (Flag 0)
8: Real Time (P77)
1: 111
Day,Hour/Minute,Seconds (midnight = 0000) ;place a time stamp
9: Sample (P70)
1:
2:
1
1
Reps
Loc [ BatVolt ]
;sample battery voltage
10: Sample (P70)
1:
2:
1
2
Reps
Loc [ Temp_PANL]
;sample panel temperature
11: If time is (P92)
1:
2:
3: 25
0
2
Minutes (Seconds --) into a
Interval (same units as above)
Set Flag 5 Low
A-10
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Appendix A. Changing COM220 Settings
12: Initiate Telecommunications (P97)
1: 22 Phone Modem/9600 Baud
2:
3: 45
;set baud-rate/modem
5
Disabled when User Flag 5 is High
Seconds Call Time Limit
Seconds Before Fast Retry
Fast Retries
4:
5:
6:
7:
0
0
0
3
Minutes Before Slow Retry
Failures Loc [ Failures ]
Callback ID
8: 222
;must also enter callback ID in LoggerNet Setup
;7-digit phone number
13: Extended Parameters (P63)
1:
2:
3:
4:
5:
6:
7:
5
5
5
1
2
1
2
Option
Option
Option
Option
Option
Option
Option
Option
8: 13
;13 is the termination character; always place after phone number
End Program
A.4.4 Example Programs for Data-Callbacks via a CR1000
Datalogger Router.
In order to do data callbacks via a datalogger router with COM220 and RF401s
or MD485s, they must all be configured to communicate with one another. In
addition, two programs are necessary: one for the datalogger router and one for
the remote datalogger. Below are example programs for a datalogger router
and a remote datalogger. For these examples, the COM220 is configured for
SDC7 and the router datalogger has the following settings (you can enter
these settings via the datalogger keypad or from the LoggerNet status table):
PakBusAddress = 2, IsRouter = 1 or True, and BeaconSDC8=30, enabling the
router to discover the remote. The remote datalogger’s PakBusAddress = 1.
In addition, the RF401s or MD485s are set for CSDC8 (see the RF401 or
MD485 manual for directions on configuring these devices).
Program for CR1000 Router:
'Router program for data callback via router w/ phone link to LoggerNet
'Phone to MD485 or RF401 w/DL at Base
'Router PakBus Address = 2, IsRouter = 1, BeaconSDC8 = 30 to discover Remote DL which has
PBA = 1
'Router COM220= SDC7; Base RF401 CSDC8; Remote RF401 CSDC8.
'LoggerNet PakBusPort has PBA = 4094
‘ PC-pcMODEM --------COM220sdc7-CR1000(2)-RF401sdc8~~~~~~~~~~~RF401sdc8-CR1000(1)
Public PanelTemperature, BatteryVoltage, DialSuccess
Public Flag(10) AS BOOLEAN
A-11
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Appendix A. Changing COM220 Settings
SequentialMode
DataTable (TestA,1,-1)
DataInterval (0,2,Sec,10)
Minimum (1,BatteryVoltage,FP2,0,False)
Sample (1,PanelTemperature,FP2)
EndTable
DialSequence (4094)
StaticRoute(ComSDC8,4094,4094)
' So router discovers LoggerNet server
DialSuccess = DialModem (ComSDC8,9600,"5551212","")
‘ Param 4 = "" allows CR1000 to accept all possible COM220 responses
‘ DialSuccess: -1 means successful, 0 means failure.
EndDialSequence (DialSuccess)
BeginProg
Scan (2,Sec,0,0)
PanelTemp (PanelTemperature,250)
Battery (BatteryVoltage)
CallTable TestA
NextScan
EndProg
Remote datalogger program for CR1000:
'Remote program for 2 minute data callbacks via DL router with RF401 or MD485 link and
COM220 link
'Datalogger router PakBusAdddress = 2
'LoggerNet server PakBusAddress = 4094
'Replace DialModem phone number with your PC's phone number
Public batt_volt, Result
Public PTemp, TCvalue_F, dummy
Public RespStrng, DialSuccess
DataTable (DC1,1,1000)
DataInterval (0,0,Sec,10)
Sample (1,PTemp,FP2)
Sample (1,TCvalue_F,FP2)
Sample (1,DialSuccess,FP2)
EndTable
BeginProg
Scan (2,Min,3,0)
PanelTemp (PTemp,250)
Battery (Batt_volt)
dummy = 0
TCDiff (TCvalue_F,1,mV2_5C,1,TypeT,PTemp,True ,0,250,1.8,32)
SendVariables(Result,ComSDC7,2,4094,0000,3500,"Public","Callback",dummy,1)
'35 sec timeout allows time for phone modems to dial/train
CallTable DC1
NextScan
EndProg
A-12
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Appendix B. CS I/O Connection
B.1 CS I/O 9-Pin Connection
The pin out of the connector is shown in Figure B-1. The direction of the
signal relative to the modem is shown in parenthesis. Unless specified
otherwise, all levels are 0 V for logic low, 5 V for logic high.
FIGURE B-1. CS I/O Pin Out
1. (input) +5 VDC supply. Not used by COM220.
2. (input) Ground
3. (output) Ring - a logic high signifies a ring signal has been detected
4. (output) RX Data - serial data from COM220
5. (input) Modem Enable - a logic high internally switches power to the
modem. A logic low internally shuts off power to the modem.
6. (input) Serial Device Enable - a logic high disables communication with
the modem without removing power or changing the modem's mode.
7. (input) SDC clock. .
8. (input) +12 VDC supply
9. (input) TX Data - serial data to COM220
B-1
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Appendix C. Theory of Operation
C.1 Theory of Operation
The COM220 modem is used to transmit data over bandwidth-limited channels
such as telephone lines by modulating audio tones. The COM220 uses various
modulation schemes including FSK (Frequency Shift Keying), TCM (Trellis
Coded Modulation), QAM (Quadrature Amplitude Modulation), and DPSK
(Differential Phase Shift Keying).
The telephone company gives a 40 to 150 VRMS, 20 Hz signal on the
telephone lines to signify a ring, which is typically on for two seconds and off
for four seconds. The COM220 is supplied with 12 V from the datalogger’s
CS I/O connector or from the COM220’s external power connector. The 12 V
is then regulated to +5 V to give power to the ring detect circuitry. The ring
detection circuitry is continuously powered but draws less than 2 µA. The ring
signal is passed on to the datalogger through an opto-coupler. The datalogger
responds to a “ring” by raising the Modem Enable line, which internally
switches the regulated +5 V supply to the rest of the modem’s circuitry.
The modem then answers and remains off-hook until it loses the carrier or the
datalogger lowers the Modem Enable line. The datalogger lowers the Modem
Enable line by remote command or after 40 seconds in the absence of a
command. When the Modem Enable line goes low, the COM220 internally
removes the +5 V from the modem circuitry, dropping power to the off-hook
relay and thus placing the telephone line on-hook. The COM220’s ring detect
circuitry is still powered at this time.
To reject noise common to both telephone lines and to satisfy registration
requirements, the modem circuitry is electrically isolated from the telephone
lines by using an opto-isolator and a coupling transformer.
C-1
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Appendix D. FCC Warning to Users of
Class B Computing Devices
WARNING
This equipment generates, uses, and can radiate radio
frequency energy, and if not installed and used in
accordance with the instruction manual, may cause
interference to radio communications. It has been
tested and found to comply with the limits for a Class
B computing device pursuant to Subpart J of Part 15
of FCC Rules, which are designed to provide
reasonable protection against such interference when
operated in
a
COMMERCIAL ENVIRONMENT.
Operation of this equipment in a residential area may
cause interference to radio and television reception.
The operator must take whatever measures are
necessary to correct the interference.
D-1
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Appendix E. IC Information
Industry Canada (IC) was formerly known as DOC.
NOTE
CP-01, Issue 8, Part I
Section 14.1
“NOTICE: The Industry Canada label identifies certified equipment. This
certification means that the equipment meets certain telecommunications
network protective, operational and safety requirements as prescribed in the
appropriate Terminal Equipment Technical Requirements document(s). The
Department does not guarantee the equipment will operate to the user’s
satisfaction.
“Before installing this equipment, users should ensure that it is permissible to
be connected to the facilities of the local telecommunications company. The
equipment must also be installed using an acceptable method of connection.
The customer should be aware that compliance with the above conditions may
not prevent degradation of service in some situations.
“Repairs to certified equipment should be coordinated by a representative
designated by the supplier. Any repairs or alterations made by the user to this
equipment, or equipment malfunctions, may give the telecommunications
company cause to request the user to disconnect the equipment.
“Users should ensure for their own protection that the electrical ground
connections of the power utility, telephone lines and internal metallic water
pipe system, if present, are connected together. This precaution may be
particularly important in rural areas.
Users should not attempt to make such connections
themselves, but should contact the appropriate electric
inspection authority, or electrician, as appropriate.”
CAUTION
CP-01, Issue 8, Part I
Section 14.2
“NOTICE: The Ringer Equivalence Number (REN) assigned to each terminal
device provides an indication of the maximum number of terminals allowed to
be connected to a telephone interface. The termination on an interface may
consist of any combination of devices subject only to the requirement that the
sum of the Ringer Equivalence Numbers of all the devices does not exceed 5.”
E-1
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Campbell Scientific Companies
Campbell Scientific, Inc. (CSI)
815 West 1800 North
Logan, Utah 84321
UNITED STATES
Campbell Scientific Africa Pty. Ltd. (CSAf)
PO Box 2450
Somerset West 7129
SOUTH AFRICA
Campbell Scientific Australia Pty. Ltd. (CSA)
PO Box 444
Thuringowa Central
QLD 4812 AUSTRALIA
Campbell Scientific do Brazil Ltda. (CSB)
Rua Luisa Crapsi Orsi, 15 Butantã
CEP: 005543-000 São Paulo SP BRAZIL
Campbell Scientific Canada Corp. (CSC)
11564 - 149th Street NW
Edmonton, Alberta T5M 1W7
CANADA
Campbell Scientific Ltd. (CSL)
Campbell Park
80 Hathern Road
Shepshed, Loughborough LE12 9GX
UNITED KINGDOM
Campbell Scientific Ltd. (France)
Miniparc du Verger - Bat. H
1, rue de Terre Neuve - Les Ulis
91967 COURTABOEUF CEDEX
FRANCE
Campbell Scientific Spain, S. L.
Psg. Font 14, local 8
08013 Barcelona
SPAIN
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