575
Error Classification and Confirmation Section 11-1
CPU Unit Indicators and Error Meanings in RUN or MONITOR Mode
Seven-segment Display
Error codes are shown on the 7-segment display if an error occurs. The 7-
segment display has only two digits, so 4-digit error codes are displayed two
digits at a time. If there are 4-digit error details in addition to the error code,
they will be displayed after the error code two digits at a time.
• Display Example
Error code: 80F1 (memory error)
Error details: 0001 (user program)
The display switches at intervals of approximately 1 s.
• If two or more errors occur at the same time, the most serious error will be
displayed first. When that error is cleared, the next most serious error will
be displayed.
• The 7-segment display shows digits created by special instructions in the
user program or by analog adjustment operations. Error code displays,
however, are given priority whenever an error occurs.
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
BKUP --- --- --- --- --- ---
PRPHL --- --- --- --- Not lit ---
Two-digit, 7-segment display
8.0.
f.1.
0.0.
0.1.
(Not lit)
To Next Page
Loading...
Need help?
General
