11 Programming Devices and Communications
11-22
CJ2 CPU Unit Software User’s Manual
Connecting CJ2M, CP1L, CP1H, CP1E, or CJ1M CPU Units 1:1
Precautions for Correct UsePrecautions 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.
z 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.
RS-232C
CPU Unit
Polling Unit
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.
Mount a CP1W-CIF01
Serial Option Board for
the CJ2M-CPU3
@
.
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