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Error Processing Section 9-2
When operation is stopped, all outputs will be turned OFF. The Servo Driver
that is in Servo ON state for outputs from the FQM1 will switch to Servo OFF
state.
Fatal Errors
Error Error
code (in
A400)
Auxiliary Area
flag and word
data
Probable cause Possible remedy
Memory
error
80F1 A401.15: Mem-
ory Error Flag
A403: Memory
Error Location
An error has occurred in memory. A
bit in A403 will turn ON to show the
location of the error as listed below.
See below.
A403.00 ON:
A checksum error has occurred in
the user program memory. An illegal
instruction was detected.
Check the program and correct the error.
A403.04 ON:
A checksum error has occurred in
the System Setup.
Transfer the System Setup settings
again.
A403.10 ON:
An error occurred in flash memory
(backup memory).
Module hardware is faulty. Replace the
Module.
A403.13 ON:
There is an error in the analog off-
set/gain data.
Check the data and set again.
A403.14 ON:
A checksum error has occurred in
the DM data stored in flash memory.
Replace the Module.
I/O Bus
error
80C0
80CE
80CF
A401.14: I/O
Bus Error Flag
Error has occurred in the data trans-
fer between connected Modules or
the End Cover is not connected to
the right side of the FQM1.
Try turning the power OFF and ON
again.
If the error persists, turn the power OFF
and check connections between the
Modules and the End Cover.
Check for damage to the Modules. After
correcting the problem, turn the FQM1’s
power OFF and then ON again.
Program
error
80F0 A401.09: Pro-
gram Error Flag
A405: Program
error information
The program is incorrect. A bit in
A405 will turn ON to show the error
details as listed below.
Check A405 to determine the type of
error that occurred.
Correct the program and then clear the
error.
A405.11: No END error Be sure that there is an END instruction
at the end of the program.
A405.15: UM overflow error
The last address in UM (user pro-
gram memory) has been exceeded.
Use the CX-Programmer to transfer the
program again to FQM1.
A405.13: Differentiation overflow
error
Too many differentiated instructions
have been inserted or deleted dur-
ing online editing.
After writing any changes to the program,
switch to PROGRAM mode and then
return to MONITOR mode to continue
editing the program.
A405.12: Task error
A task error has occurred. The task
specified in the MSKS instruction
doesn’t exist.
Check that all of the task numbers speci-
fied in the MSKS instructions have corre-
sponding tasks.
Use MSKS to mask any input interrupt
task or other interrupt tasks that are not
being used and that do not have pro-
grams set for them.
A405.14: Illegal instruction error
The program contains an instruction
that cannot be executed.
Check and correct the program.