Omron EJ1 User Manual page 181

Connecting More Than One HFU
SYSMAC-CS/CJ-series PLC
156
RS-485
EJ1
HFU
Port 1
RS-485
Unit
No. 0
EJ1
HFU
Unit
No. 7
Note Set the unit number of the Basic Unit to
any number that was not set for the HFU.
Section 5-2
TC EDU
Unit
No. 1
TC EDU
Unit
No. 0