Omron CJ2 CPU UNIT SOFTWARE User Manual page 458

11 Programming Devices and Communications
Connecting CJ2M, CP1L, CP1H, CP1E, or CJ1M CPU Units 1:1
CPU Unit
Polling Unit
RS-232C
Mount a CP1W-CIF01
Serial Option Board for
the CJ2M-CPU3@.
CPU Unit
Polled Unit 0
Note: If PTs are set to the Serial PLC Link protocol on the
same line, the maximum of 8 Unit must include the
polled PTs and CPU Units.
Precautions for Correct Use Precautions for Correct Use
The CJ1M-CIF11 and CP1W-CIF11 are not isolated. The maximum transmission distance is
therefore 50 m. If the distance exceeds 50 m, use the NT-AL001 (isolated) and do not the CJ1W-
CIF11 or CP1W-CIF11 anywhere in the transmission path. If you use only the NT-AL001, the
maximum total transmission distance will be 500 m.
Procedure
Serial PLC Links operate based on the following settings in the PLC Setup for the Polling Unit and
the Polled Units.
Polling Unit Settings
1
Set the serial communications mode of the RS-232C port to Serial PLC Links, Polling Unit.
2
Set the link method to All or Polling Unit.
3
Set the number of words to link. (1 to 10)
4
Set the highest unit number to use for Serial PLC Links. (0 to 7)
Polled Unit Settings
1
Set the serial communications mode of the RS-232C port to Serial PLC Links, Polled Unit.
2
Set the unit numbers of the Polled Units in the Serial PLC Links.
11-22 CJ2 CPU Unit Software User's Manual