Sending and receiving SMS messages with serial CP or CM and MODEM MD720
To connect a SIMATIC S7-300, S7-400, S7-1500, ET 200S or ET 200SP to a GSM network, the GPRS/GSM MODEM MD720 is connected to the serial interface of a communications processor (CP340, CP341, CP441-2, 1SI, CM PtP).
The appropriate function block "LMD720_SmsXxxx" from the library is used for data exchange between a SIMATIC S7-CPU and a serial communication module or a serial communication processor and the MODEM MD720.
The solution presented here offers the following advantages:
- The "LMD720_SmsXxxx" user block provides you with immediately usable functions for your applications.
- By using the MODEM MD720 you can send alarm messages or other important system information to the service staff with low cost.
This library is only valid for the MODEM MD720. The application examples for MD720-3 are available in the archive.
Wireless Signaling and Switching via SMS with serial CPs/CMs and the MD720-3 GPRS/GSM Modem (STEP7 V13) (12,3 MB)
Wireless Signaling and Switching via SMS with serial CPs/CMs and the MD720-3 GPRS/GSM Modem (STEP7 V5.5) (3,2 MB)
The following links provide additional information on sending SMS messages with SIMATIC controllers.
Signaling and Switching via SMS with S7-1200 and CP 1242-7 GPRS V2 (Set 32)
Wireless Signaling and Switching per SMS with S7-1200 Controller and MD720-3 (Set 25)
Sending and Receiving SMS Messages via a SCALANCE M Router
New library for the MODEM MD720.