Error Processing
10-2-4 Errors and Troubleshooting
CPU Standby Errors
and Expansion Rack
Power Interruptions
Error
Program-
ming
Console
Auxiliary
display
CPU
CPU
None
standby
WAIT'G
error
Expansion
EXT
None
Rack power
POWER
interruption
OFF
The following tables show error messages for errors which can occur in CS1D
PLCs and indicate the likely cause of the errors.
When the following indicator status appears during operation in RUN or MON-
ITOR Mode, a CPU standby error or Expansion Rack power interruption has
occurred and the CX-Programmer display will indicate one of these errors.
Power Supply Unit
CPU Unit
Duplex Unit (with
error occurring on
active CPU Unit)
(Duplex CPU Sys-
tems)
For all of the following errors, operation will stop if the error occurs with a Sin-
gle CPU Systems, or in either Duplex Mode or Simplex Mode with a Duplex
CPU System.
Error
Error
Flags and
flags in
code (in
word data
A400)
Area
None
A32203
A32207
A32205
A32204
A32206
None
A32208
Note When power supply is interrupted to an Expansion Rack, the CPU Unit will
stop program operation. If power is then restored to the Expansion Rack, the
CPU Unit will perform startup processing, i.e., the same operational status as
existed before the power interrupt will not necessarily be continued.
POWER
RUN
ERR/ALM
INH
PRPHL
COMM
DPL STATUS
Active CPU Unit
ACTIVE
indicators
CPU STATUS
Standby CPU Unit
ACTIVE
indicators
CPU STATUS
Probable cause
A CPU Bus Unit has
Check the settings of the CPU Bus Unit.
not started properly.
A Special I/O Unit was
Check the settings of the Special I/O Unit.
not recognized.
Inner Board was not
Check the settings of the Inner Board.
recognized.
Duplex verification
Press the initialization switch on the Duplex
error.
Unit. If the problem persists, check the DIP
switch setting.
If the problem persists, check the model num-
ber of the CPU Units and the Inner Units to see
if they are the same.
Duplex bus error.
Press the initialization switch on the Duplex
Unit. If the problem persists, replace the
Duplex Unit.
Waiting for other CPU
Check the settings of the standby CPU Unit.
unit.
Power is not being
Supply power to the Expansion Rack.
supplied to an Expan-
With the CS1D, the Programming Console can
sion Rack.
be used in this condition.
Section 10-2
Lit green
Not lit
Not lit
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---
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Lit green
Flashing green
Not lit
Flashing green
Possible remedy
417
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