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fritz · Member Joined: 26 Dec 2015 Posts: 179

Communication between two LOGO! Controllers by means of LOGO! CMR and SMS

A LOGO! 8 controller and a LOGO! CMR communication module are installed both in the valley as well as on the mountain. With the aid of LOGO! CMR both controllers can communicate with each other via SMS.
The filling level of the water reservoir is monitored via four commercially available floats.

Mountain station requests water
A low filling level is detected by means of the bottom float. The mountain station sends an SMS to the valley station and requests water. A pump is controlled with the help of a contactor via an output of the LOGO! in the valley station and water is pumped to the mountain station. When the specified time is up, the pump switches off automatically. The valley station acknowledges the request via SMS.
If the valley station does not respond within a certain time, the mountain station sends a second SMS. If there is also no response to the second text message, an error is output and the operator is informed via SMS.

Mountain station requests the pump to be switched off
If the top float detects that the water reservoir is full, the mountain station sends an SMS to the valley station to switch off the pump. The pump is then switched off by the valley station before the fixed time is up. The valley station acknowledges the request via SMS.
If the valley station does not respond within a certain time, the mountain station sends a second SMS. If there is also no response to the second text message, an error is output and the operator is informed via SMS.

Operator requests the filling level
The operator requests the filling level of the water reservoir via SMS. The mountain station replies with the current filling level via SMS.

Downloads
https://support.industry.siemens.com/cs/attachments/109483740/109483740_LOGO_CMR_SMS_Pump_DOC_V10_en.pdf
https://support.industry.siemens.com/cs/attachments/109483740/109483740_LOGO_CMR_SMS_Pump_PROJ_V10_en.zip