Omron SYSMAC FH Series User Manual page 404

2 Methods for Connecting and Communicating with External Devices
Additional Information
If you are using external reference numbers 5 to 12 on an FZ4 or earlier model, use 1000 to
1007 on the FH/FHV.
2 - 342
FH/FHV Series Vision System User's manual for Communication Settings (Z342-E1)