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RSLinx must have UDP disabled when working with SoftLogix PLCs.

I am using the TOP Server ControlLogix Ethernet driver trying to communicate with a SoftLogix 5800 controller. I am getting CIP Error 0x08 (Unsupported Service). I have verified my communications settings and device ID. What could be the problem?

Since RSLinx is installed on the same machine when using a SoftLogix PLC, there are a few things to watch out for when communicating with the SoftLogix:

  1. UDP must be DISABLED in RSLinx for TCP/IP communications with the SoftLogix to be possible.
    • This is a setting in RSLinx that is enabled by default and can be found under Options ⇒ General in RSLinx.
    • Find the checkbox labelled "Accept UDP Messages on Ethernet Port" and make sure it is UNCHECKED.
  2. RSLinx on the SoftLogix PC should not have any Ethernet-based Device Drivers configured (Ethernet Device, Remote Devices via Gateway, etc).
    • It has been shown that having one or more Ethernet-based drivers installed in RSLinx causes requests to return the following CIP Errors:  CIP Error 0x05 Ext. 0x01 and CIP Error 0x08.

If you have verified that your configuration matches the above recommendations and you are still not able to communicate with your SoftLogix, please contact technical support.