Replacing The Unit - Omron CJ1W-SCU32 Operation Manual

9 Troubleshooting and Maintenance
9-7-3

Replacing the Unit

1
Turn OFF the power to the controller to which the Serial Communications Unit to be replaced is
mounted, and to all external devices that are connected via a serial network.
2
Disconnect the communications cables connected to the Serial Communications Unit to be
replaced, and also remove the Unit.
3
Before you mount the replacement Unit, set the following hardware switches to the same set-
tings of the Unit that was mounted before.
• Unit number setting switch
• Terminating resistance switch (RS-422A/485 ports)
• 2-wire or 4-wire switch (RS-422A/485 ports)
4
Turn ON the power of the CPU Unit to which the replacement Serial Communications Unit is
mounted, and to all external devices that are connected via a serial network, and start system
operation.
5
Check the indicators and status display and confirm that system operation is normal.
Using protocols separately designed with CX-Protocol
1
Connect CX-Protocol to the CPU Unit to which the replacement Serial Communications Unit is
mounted, and switch the operating mode to PROGRAM Mode.
2
Save the protocol macro data by using the CX-Protocol. Refer to the CX-Protocol Ver.1.9
OPERATION MANUAL (Cat. No. W344) for details.
3
Turn OFF the power to the CPU Unit to which the Serial Communications Unit to be replaced is
mounted, and to all external devices that are connected via a serial network.
4
Disconnect the communications cables connected to the Serial Communications Unit to be
replaced, and also remove the Unit.
5
Before you mount the replacement Unit, set the following hardware switches to the same set-
tings of the Unit that was mounted before.
• Unit number setting switch
• Terminating resistance switch (RS-422A/485 ports)
• 2-wire or 4-wire switch (RS-422A/485 ports)
6
Turn ON the power of the CPU Unit to which the replacement Serial Communications Unit is
mounted, and to all external devices that are connected via a serial network.
7
Switch the operating mode of the CPU Unit to PROGRAM Mode, and use the CX-Protocol to
transfer the protocol macro data to the Unit. Refer to the CX-Protocol Ver.1.9 OPERATION
MANUAL (Cat. No. W344) for details.
8
Switch the operating mode of the CPU Unit to RUN Mode, and start system operation.
9
Check the indicators and status display and confirm that system operation is normal.
9-56 CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)