Replacing Process-Control Cpu Units - Omron SYSMAC CS1W-LCB01 Operation Manual

Maintenance
7-2-2

Replacing Process-control CPU Units

Note
Note
Note
1,2,3...
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When replacing a Process-control CPU Unit (CS1D-CPU@@P), switch the
Duplex Unit's CPU USE/NO USE switch to "NO USE" to allow the Process-
control CPU Unit to be replaced while power is supplied to the PLC.
When using Process-control CPU Units, always replace the entire Process-
control CPU Unit as one Unit, even if only the CPU Unit or Loop Controller
component has failed.
Step 1
Switch the CPU USE/NO USE switch to "NO USE" on the Duplex Unit for the
Process-control CPU Unit that is to be replaced.
While the switch is set to "NO USE," power is turned OFF to the Process-con-
trol CPU Unit. Check that no indicators on the CS1D Process-control CPU
Unit to be replaced are lit.
Before replacing the Process-control CPU Unit, always switch the Duplex
Unit's CPU USE/NO USE switch to "NO USE." Removing the Process-control
CPU Unit with the switch set to "USE" (power supplied) may damage the CPU
Duplex Backplane or the Duplex Unit.
Example: When the Process-control CPU Unit on the right side is malfunc-
tioning, switch to the left Process-control CPU Unit and operate in simplex
mode.
DPL Unit
Process-control CPU Process-control CPU Unit
Unit operating. malfunctioning.
Step 2
Replace the entire right-side Process-control CPU Unit.
Step 3
Switch the CPU USE/NO USE switch for the Duplex Unit's right-side CPU Unit
to "USE."
When Return Automatically option is set to Do not Automatically Return to
duplex operation in the PLC Setup (default), the function block data will not be
automatically transferred when the CPU USE/NO USE switch is set to "USE."
(Operation will remain in simplex mode and operation will not continue if an
error occurs in the active Process-control CPU Unit.)
Step 4
Perform the following procedure if Return Automatically is set to Do not
Automatically Return to duplex operation in the PLC Setup.
1. Check that the DPL switch is set to "DPL."
2. Switch the CPU USE/NO USE switch to "USE" and then press the initial-
ization switch.
Section 7-2
The USE/NO USE switch for
the DPL Unit's right CPU Unit
Right-side CPU
USE
Switch to "NO USE"
NO USE
Check that all indicators are OFF on the
right-side Process-control CPU Unit.