561
Error Classification and Confirmation Section 10-1
CPU Unit Indicators and Error Meanings in RUN or MONITOR Mode
Auxiliary Area
■ Error Code Storage Word
The error code is stored in A400 when an error occurs. If two or more errors
occur at the same time, the most serious error will be stored.
■ Error Flags
Flags that indicate the type of error are allocated in the Auxiliary Area.
■ Error Information
This area indicates specific information on the meaning of error flags and pro-
vides information on error location and error details.
■ Fatal Errors
■ Non-fatal Errors
Indicator CPU
error
CPU
standby
Fatal
error
Non-
fatal
error
Peripheral port
communica-
tions error
Output
OFF Bit
turned ON
POWER Lit Lit Lit Lit Lit Lit
RUN Not lit Not lit Not lit Lit Lit Lit
ERR/ALM Lit Not lit Lit Flashing --- ---
INH Not lit --- --- --- --- Lit
PRPHL --- --- --- --- Not lit ---
BKUP --- --- --- --- --- ---
Error Error code
(A400)
Error flag Error information
Meaning Address
Memory error 80F1 A401.15 Memory error
location
A403
I/O bus error 80C0 to 80C7,
80CA, 80CE,
80CF
A401.14 I/O bus error
details
A404
Too many I/O error 80E1 A401.11 Details for too
many I/O error
A407
Program error 80F0 A401.09 Program error
details
A294 to A299
Cycle time too long
error
809F A401.08 --- ---
FALS instruction
executed
C101 to C2FF A401.06 --- ---
Error Error code
(A400)
Error flag Error information
Meaning Address
FAL instruction
executed
4101 to 42FF A402.15 Executed FAL
number
A360 to A391
Flash memory
error
00F1 A315.15 --- ---
Interrupt task error 008B A402.13 Interrupt task
error unit num-
ber
A426
PLC Setup error 009B A402.10 A406
Option Board error 00D1, 00D2 A315.13 Error Option
Board Flags
A424
Battery error 00F7 A402.04 --- ---
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