Omron CS1W-CLK12-V1, Operation Manual

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Troubleshooting for Duplex Communications Units Section 10-5
Troubleshooting for Errors at Startup
Active Unit Standby Unit Status area
(Auxiliary Area)
Probable cause Probable remedy
RUN ERC RUN ERC
Lit Not lit Flashing Not lit --- Both the active and
standby Units are
operating normally. ---
Not lit Not lit Not lit Not lit --- Power is not being
supplied correctly to the
PLC. Check the power supply
voltage and supply at the
recommended voltage.
--- The Power Supply Unit
is not a CS1D Power
Supply Unit. Use CS1D Power Supply
Units for CS1D Systems.
--- The Controller Link Unit
has become loose. Secure the Controller
Link Unit firmly.
CPU Bus Unit Error Flag
(A40207) There were errors in
both active and standby
Units. If the same problem
occurs when the Units
are mounted on another
PLC, replace them.
I/O bus error B:
I/O Bus Error Flag
(A40114)
I/O Bus Error Rack
Number (0B Hex is
stored in bits 8 to 15 of
A404) The wrong Expansion
Backplane is connected. Replace the Expansion
Backplane with a CS1D
Expansion Backplane
(supports online Unit
replacement).
Lit Not lit Lit Not lit (CPU on standby) 4 or more pairs of
Communications Units
are set for duplex
operation. The maximum number of
pairs of Communications
Units mounted on 1
CS1D PLC that can be
set for duplex operation
is 3.
Not lit Not lit
(ERH is
lit) Flashing Not lit Duplex Communications
Setting Error Flags
(A435)
CPU Bus Unit Setting
Error Flag (A40203)
The active Controller
Link Unit’s unit number is
set incorrectly. Set the active Controller
Link Unit’s unit number
to the same number as
the standby Unit and
reset the power.
The active Controller
Link Unit does not
support duplex
operation. Mount a duplex-
compatible Controller
Link Unit (CS1W-
CLK12-V1 or CS1W-
CLK52-V1).
Lit Not lit Not lit Not lit
(ERH is
lit) Duplex Communications
Setting Error Flags
(A435)
CPU Bus Unit Setting
Error Flag (A40203)
The standby Controller
Link Unit’s unit number is
set incorrectly. Set the standby
Controller Link Unit’s unit
number to the same
number as the active
Unit and reset the power.
Lit Not lit
(ERH is
lit) Not lit Not lit
(ERH is
lit) CPU Bus Unit
Duplication Error Flag
(A40113) The duplex settings in
the PLC Setup have not
been made. Make the duplex settings
for the relevant Unit
under Communication
Unit Duplex Setting in
the PLC Setup using
CX-Programmer.
Lit Not lit
(ERH is
lit) Not lit Not lit Duplex Communications
Setting Error Flags
(A435)
CPU Bus Unit Setting
Error Flag (A40203)
CPU Bus Unit Setting
Error Flag (A40207)
The active Controller
Link Unit does not
support duplex
operation. Mount a duplex-
compatible Controller
Link Unit (CS1W-
CLK12-V1 or CS1W-
CLK52-V1).