Michael Hickey Posted May 1, 2014 Report Share Posted May 1, 2014 I purchased a UAC-02RS2 so I could connect a radio and need to configure the com port for Modbus slave. Is there an example? Radio does not use RS285 or Ethernet and I would prefer not having to purchase a converter to convert to RS485 thus the additional com ports. Quote Link to comment Share on other sites More sharing options...
s.pratt Posted May 2, 2014 Report Share Posted May 2, 2014 Hello Michael, Thank you for using our Forum. In order to use Modbus via the UAC-02RS2 communication module, you would need to manually create the communication via the COM Rx and COM Tx function blocks in the Serial tab. We do have an RS232/RS485 converter that can be implemented with the CPU RS485 connection, which will allow you to use our Modbus communication function blocks. (Part #M90-19-R4). What is the radio you are trying to use with this PLC? Quote Link to comment Share on other sites More sharing options...
Michael Hickey Posted May 3, 2014 Author Report Share Posted May 3, 2014 The Radio is an old one that used to have a working RS485 port but it was damaged a few years ago. The Radio is obsolete and the community is reluctant to change out the existing radio without changing them all which results in a large cost. i.e. This is a patch until they can free up some funding. I have several converters and gateways in my office but had hoped to use the comport card. I will use one of those until someone with more experience and smarts than me creates a user block (and shares) for Modbus communication for the expansion com port. thank you for the quick reply. Quote Link to comment Share on other sites More sharing options...
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