Omron FZ4 Series User Manual page 526

Important
Set the communication module to [EtherNet/IP] before setting the communication specifications. Save the
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setting to the controller and then restart the system. Furthermore, if the operation mode is set to the multi-line
random trigger mode, the communication module on line 1 must also be set to "Ethernet/IP."
Reference:
When using 2-line random trigger mode with the FZ4-11
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the sending and receiving areas of line 0 and line 1.
After the tag data link is set, the controller automatically restarts to reflect the setting.
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On the Main screen, tap [System] menu → [Communication] → [EtherNet/IP].
1.
The EtherNet/IP window is displayed.
2.
Set the following items.
7
524 Control/Output through EtherNet/IP
Setting the Start-up Status [Startup Setting] (p.347)
/H11 series, specify different addresses for
FZ4 User's Manual