To enable the PLC to use SMS messaging, you must:
Create the SMS phone book; the PLC can only send SMS messages to phone numbers listed in the phone book.
Create SMS messages.
Configure the SMS Message Properties for each SMS message.
Configure your SMS messaging features.
Download the project to the PLC.
Connect the PLC to a GSM modem
After you have performed the above procedures, you can use SMS messages in your application.
Once SMS messages have been created, configured, and downloaded to the PLC, the PLC can receive these messages from a GSM cell phone.
Note that you must use the English character set to write SMS messages.