You should have the appropriate documentation for your programmable controllers available when configuring this interface option. The following documents are available from GE Fanuc:
Series Six Programmable Controllers Data Communications Manual (GEK-25364)
Series Five Data Communications (GFK-0244)
Series 90 PLC Serial Communications User's Manual (GFK-0582)
CCM2 hardware installation external to the computer.
About CCM2 Communications.