Setting Up Plc - Omron CJ Series Connection Manual

7.3. Setting up PLC

Set up PLC.
7.3.1. Hardware Settings
Set the hardware switches on Serial Communications Unit and connect the cables.
Precautions for Correct Use
Make sure that the power supply is OFF when you perform the setting up.
1
Make sure that the power supply
to PLC is OFF.
*If the power supply is turned
ON, settings may not be
applicable as described in the
following procedure.
2
Check the positions of hardware
switches on the front panel of
Serial Communications Unit by
referring to the right figure.
3
Set Unit number switch to 0.
*The unit number is set to 0 as
the factory default setting.
4
Set Terminating resistance
ON/OFF switch to ON
(Terminating resistance ON).
5
Set 2-wire or 4-wire switch to 2
(2-wire).
7．Serial Communications Connection Procedure
TERM (Terminating resistance ON/OFF switch)
OFF: Terminating resistance OFF
ON: Terminating resistance ON
WIRE (2-wire or 4-wire switch)
2:2-wire;4: 4-wire
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