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When I connect TC35i modem to PC via USB-to-RS232 converter everything works greate. Doing "Prepare PLC-side modem" in Modem Services in VisiLogic OPLC IDE result in connection and success. Making a test dial from Modem Services also results in success.

 

But when I connect my PLC (it is V560) with the modem using a 4-wire RJ11 programming cable (ended with MJ10-22-CS25 and simple Male-to-Male adapter) then the Modem Init fails and SB 83 bit become 1 (SB 83 is Modem Init Fail for COM 2).

 

I suppose that something wrong is with the cable. How am I supposed to connect V560 to TC35i?

 

Thanks for help...

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The programming cable is a crossover cable, just like ones used for landline phone service. You probably need a data cable, which is a straight-thru cable, for your modem.

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