... SMS Relay-- --Your ideal of Solution for : Remote Control,Monitoring & Alarming!x-Messenger- Expandable GSM/GPRS PLC incorporates ... wireless systems being used for remote measurements, data logging, control, diagnostics and object via short text messages (SMS) ... , pulse relay ,counters ,Watchdog function ,PI controller etc..Ø Logic functions-AND, OR, NOT, XOR……Ø Standard configure soft& Customized ...