... Control,Monitoring & Alarming!x-Messenger- Expandable GSM/GPRS PLC incorporates a wide range of CPUs, expansions, various ... , Timers and Counters, High speed inputØ Event based transmissionØ Remote configuration via GPRS and user friendly ... 70 Unicode Characters in one short messageØ Time-based and event-based SMS, Call-IN, Call-Out, Ring, voice ... programmable logic controller,GPRS/SMS/GSM PLC