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Error Processing Section 9-2
9-2 Error Processing
9-2-1 Error Categories
Errors in the FQM1 can be broadly divided into the following three categories.
9-2-2 Error Information
There are basically four sources of information on errors that have occurred:
• The LED indicators on the front of the Coordinator and Motion Control
Modules
• The Auxiliary Area Error Flags
• The Auxiliary Area Error Contents Words
• The Auxiliary Area Error Code Word
Note When two or more errors occur at the same time, the highest (most serious)
error code will be stored in A400.
Indicator Status and
Error Conditions
The following table shows the status of the FQM1’s indicators for errors that
have occurred in RUN or MONITOR Mode.
Category Result Indicators Comments
RDY RUN ERR
Standby The FQM1 will not start operation
in RUN or MONITOR mode.
OFF OFF OFF This status occurs when a faulty
Motion Control Module is con-
nected.
Non-fatal Errors
(including FAL)
The FQM1 will continue operating
in RUN or MONITOR mode.
ON
(Green)
ON
(Green)
Flashing
(Red)
This status indicates a non-fatal
error other than a communications
error.
Fatal Errors
(including FALS)
The FQM1 will stop operating in
RUN or MONITOR mode.
ON
(Green)
OFF ON
(Red)
This status indicates a fatal error
other than a power interruption.
(The indicators will all be OFF when
there is a power interruption.)
RDY
RUN
ERR
PRPHL
RDY: Initialization completed
ERR: Self-diagnostic test
Flashing red:
Non-fatal error
Lit red:
Fatal error
COMM1
COMM2
RUN:
PRPHL:
COMM1:
Module Indicators
Lit when the Modules
are in RUN or
MONITOR mode.
Lit yellow when the
Module is communi-
cating through the
peripheral port
Lit yellow when the
Module is commu-
nicating through the
RS-232C port
Flags
indicating
the type of
error.
Words
providing
error
information.
Error Flags
Error Info.
Error Code
Word
(A400)
A400
contains the
error code.
(See note.)
Auxiliary Area Flags and Words
A400
Error code
COMM2:
Lit yellow when the
Module is commu-
nicating through the
RS-422A port
Indicator CPU error CPU reset CPU
standby
Fatal error Non-fatal
error
Communications error
Peripheral RS-232C RS-422A
RDY OFF OFF OFF ON ON ON ON ON
RUN OFF OFF OFF OFF ON --- --- ---