Cpu Unit Replacement Procedure - Omron SYSMAC CS1D-PD Series Operation Manual

Replacing a CPU Unit

11-3-2 CPU Unit Replacement Procedure

1,2,3...
!Caution You must set the USE/NO USE switch on the Duplex Unit to NO USE before
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1. Change the USE/NO USE switch for the CPU Unit to be replaced to NO
USE. When the switch is changed to NO USE, the power supply to the
CPU Unit will turn OFF.
2. Confirm that the indicators on the CPU Unit to be replaced have all gone
out.
replacing a CPU Unit to turn OFF the power supply to the CPU Unit. If a CPU
Unit is replaced while power is still being provided (i.e., with the switch set to
USE), the CPU Backplane for Duplex CPU System or Duplex Unit may be
damaged.
Example: The following illustration shows the switch setting when the right
CPU Unit has failed and the left CPU Unit has taken over operation in Sim-
plex Mode.
Duplex Unit
Operating Failed
3. Replace the faulty CPU Unit with a new CPU Unit.
Duplex Unit
Operating
Failed CPU Unit
C S C S
R U N R U N
ER R/ ALM ER ALM
I N I N H BKUP
PR PH PR PH C O M
C O M M
4. Make sure of using either of the following for the new CPU Unit.
• CPU Unit model same as before replacement
• Set the CS1D-CPU67HA to allow the combination of the CPU Unit
model in operation and the Duplex CPU Compatible Setting when us-
ing the Duplex CPU Compatibility Setting of the CS1D-CPU67HA.
To determine whether or not CPU Unit duplication is possible for the
combination of a CPU Unit model and Duplex CPU Compatible Set-
ting, refer to 3-1-8 Duplex CPU Compatible Setting.
Switch for right-side CPU Unit
on the Duplex Unit
R I G H T C P U
U S E
N O U S E
Confirm that all indicators on the
right-side CPU Unit are OFF.
New CPU Unit
C S C S
R U N R U N
ER R/ALM ER R/ALM
I N I N H BKUP
P R P P R P H CO M M
O M M
Section 11-3
Set to NO USE.