TT_ZX Posted July 27, 2011 Report Share Posted July 27, 2011 I have set up a Enfora modem on Com port 1 on the PLC and now I cant connect via the USB port. I get the following message: ***http://imageshack.us/photo/my-images/220/comerror.png*** I am using Com 2 for Modbus so can't use this for the modem. I thought that connecting to the USB port would disable Com 1 and this would be OK. Can some please offer advice on how I can use Com 1 and USB but not at the same time. It would be OK if I could enable or disable the modem via an operand. Quote Link to comment Share on other sites More sharing options...
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