We are establishing Vijeo Citect SCADA communication with Rockwell PLC using the PKTX Card installed in PC and through DH+ port communicate with Rockwell PLC through ABRSLINX driver . Do we need to use RSLinx Classic OEM or do we need RS Linx Classic Gateway license for this communication.
You need to upgrade RSLinx to at least OEM (Professional and Gateway will also work). As per the ABRSLINX driver help RSLINX needs to be installed on the same machine as the IOServer. This means that if you have a redundant system you need to have 2 RSLILNX licenses.