... SMS Relay-- --Your ideal of Solution for : Remote Control,Monitoring & Alarming!x-Messenger- Expandable GSM/GPRS PLC incorporates a wide ... are a convenient way of passing important information to the monitoring center, or directly to the defined phone numbers. ... on/ off-delays, pulse relay ,counters ,Watchdog function ,PI controller etc..Ø Logic functions-AND, OR, NOT, XOR……Ø Standard configure soft ...