GPRS/GSM Modem and SMS Messaging
Sending and receiving SMS messages using the GSM/GPRS modem
INTERFACE
Application Note
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Description
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3.
The PSI-GPRS/GSM-MODEM/RS232-QB… modems (Part
No. 2900059 and 2900060) have the ability to send and
receive messages using SMS protocol, available on many
cellular telephones. Using the SMS message service, the
digital output on the modem can be controlled, and the
digital inputs can be reset.
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Configuration
2.1
Modem Setup
To set up the modem:
1. Connect the modem to the PC using a serial 1:1 cable,
PSM-KA9SUB9/BB/2METER (Order No. 2799474).
2. Start the “PSI-MODEM-CONFIG” software provided
with the modem.
Select the “Options… RS232” menu to open the “Serial
Interface” dialog box. Place a check in the “COM-Port
device” check box that corresponds to the COM port
connected to the modem. Do not edit the default serial
settings.
Figure 1
4.
“Serial Interface” dialog box
Select the “File… New” menu or click the “New” button
to begin a new configuration.
Figure 2
Make sure you always use the latest documentation.
It can be downloaded at www.download.phoenixcontact.com.
A conversion table is available on the Internet at
www.download.phoenixcontact.com/general/7000_en_00.pdf.
Selecting the PSI-GPRS/GSM-MODEM/
RS232-QB device
GPRS/GSM Modem and SMS Messaging
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From the option list that appears, select “PSI-GPRS/
GSM-MODEM/RS232-QB” from the drop-down list.
The “PSI-MODEM-CONF” dialog box appears.
Figure 3
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“PSI-MODEM-CONF” dialog box
Click the tab of the input to configure, either the “Input 1”
or “Input 2” tab.
Click the “SMS” check box to select it.
In the “Number” field, enter the number to be called
when the input is ON.
In the “SMS Message” field, enter the text to send when
the input is ON (160-character maximum). This
message will be displayed on the phone when called.
Figure 4
“GPRS/GSM Configuration” dialog box
12. Click the “OK” button to save changes and close the
“GPRS/GSM Configuration” dialog box.
13. Click the “Write configuration to PSI-device” button
to upload the configuration to the modem.
10. Click “Edit profile of PSI-device” button
to open
the “GPRS/GSM Configuration” dialog box.
11. In the “GPRS/GSM Configuration” dialog box, set the
following parameters:
– From the “DTR Signal” drop-down menu, select
“Ignore DTR-Signal.”
– From the “Auto Answer” drop-down menu, select,
“OFF.”
– From the “SMS Mode” drop-down menu, select
“Control Mode.”
– If desired, select “Enable” from the “Password
Mode” drop-down menu and enter the desired
password in the “Password” field.
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GPRS/GSM Modem and SMS Messaging
2.2
Testing SMS message output from the modem
After configuring the modem, a test message should be sent
to ensure functionality. To send a message:
1. Turn the desired input ON, using either a connected
control system, if applicable, or apply 24 V directly to
the input terminal, (either Input 1 or Input 2) (the LED
“ALR” will start flashing.)
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Controlling the digital I/O with SMS
To send a message to the modem to activate or de-activate
the digital output:
1. Use a mobile phone and send the following message to
set the output:
#1234:SET:OUTPUT where “1234” is the password
entered in the “GPRS/GSM Configuration” dialog
box, if configured.
PSI-GPRS/GSMMODEM/RS232-QB-US
Ord.-No. 29 00 059
B-US
VCC
RD
ANT
ALR
ALR
NET
DCD
SI M
RS 232
Figure 5
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LED locations
Check the receiving phone (the number in the “PSIMODEM CONF” dialog box) to confirm receipt of the
message.
Figure 6
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Typical message display on a telephone
The following message will reset the digital output.
#1234:CLR:OUTPUT where “1234” is the password.
The following message will reset the digital input.
#1234:RESET where “1234” is the password.
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