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Based on PLCPi, We can generate a cold storage monitoring system. Just use a PLCPi for a cold storage – standalone device, but will need more if having more than one cold storage – network system.

In standalone device, the solution includes:

– One PLCPi cabinet

– Temperature sensors for collecting temperature value of many locations in cold storage.

– a Siren for local alarming

– 3G dongle for sending SMS and Email Alarm.

– PLCPi connects to SCADA for providing realtime data for SCADA system or it can directly log data into SQL data base for storing or making report.

The picture below is the network system

Each PLCPi controller plays a role of collecting temperature value and making local alarm for each cold storage.

These PLCPis connect to LAN by wifi signal so that ATSCADA software in monitoring room can collect data from these and make central actions for the system: realtime data display, central alarm, sms, email, trend, report, …