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I don't know what kind of interface the Siemens PCS-7 PLC has to communicate with a GSM-modem. Neither do I know what kind of interfaces GSM-modems have. I've been to Siemen's homepage several times but I can't seem to find any clear information there. It would of course be best if I could connect a GSM-modem directly to the PLC without any additional electronics.
I would like to know if anyone knows any good solutions or web-places I can go to find these solutions. After I've solved this problem I'll have to program the PLC to send SMS-messages but that's another problem which I'll encounter later...
I would like to know if anyone knows any good solutions or web-places I can go to find these solutions. After I've solved this problem I'll have to program the PLC to send SMS-messages but that's another problem which I'll encounter later...