Plc Setup - Omron CJ Series Connection Manual

7.3. PLC Setup

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 set up.
1
Make sure that PLC is powered
OFF.
*If it is ON, the settings
described in the following steps
and subsequent procedures
may not be applicable.
2
Check the positions of the
hardware switches and Port 1 by
referring to the figure on the
right.
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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