Replacing A Cpu Unit; Replacement Flowchart After Switch To Standby Cpu Unit - Omron SYSMAC CS1D-PD Series Operation Manual

Replacing a CPU Unit

11-3 Replacing a CPU Unit

11-3-1 Replacement Flowchart after Switch to Standby CPU Unit

If the active CPU Unit fails during operation in a Duplex CPU System, the
standby CPU Unit will switch to become the active CPU Unit and operation
will continue. Use the following procedure to replace the faulty CPU Unit and
restore duplex operation.
Online Unit replacement is not possible for a CPU Unit in a Single CPU Sys-
tem. Turn OFF the power supply to the PLC before replacing the Unit.
The CPU STATUS indicator for the
active CPU Unit flashing or lit red.
Error causing switch to standby CPU
Unit in Simplex Mode. (See A023 for
the cause of the switch and A024 to
A025 for the time the switch was
made.)
Change the switch for the faulty
CPU Unit (the one that was the
active CPU Unit) to NO USE.
Replace the CPU Unit.
Change the switch for the new
CPU Unit to NO USE.
PLC
Setup set for
automatic recovery
to Duplex
Mode?
No
Press the initialization
button.
Operation should start in Duplex Mode.
Yes
Section 11-3
453