bgottenmusic Posted December 2, 2015 Report Share Posted December 2, 2015 Hello, I am new to this forum. I was looking to see if anyone had any info on what I'm trying to do, and I haven't found any, so here is what I am trying to do: I would have 4 PLC's connected to cellular modems at different sites. I would need the PLC's to communicate (transmit and receive) data to each other, but also they need to be gable to communicate back to a station that sites in the middle. That middle station can send and receive to the PLC's as well. The first thing I would ask is is this possible, without having it attached to a SCADA system, and if so, where would I start? Thank Quote Link to comment Share on other sites More sharing options...
s.pratt Posted December 2, 2015 Report Share Posted December 2, 2015 Hello, Are you trying to have the PLCs remotely communicate to eachother via the cellular modem? If you, once you connect the modem to the GPRS network (assuming you are using a GSM modem) you may communicate with the Modbus protocol. I have added the program here: http://forum.unitronics.com/index.php?/files/file/46-modbus-client-and-server-over-gprs/ Hope this helps. Quote Link to comment Share on other sites More sharing options...
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