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7-3SectionSelf-diagnostic Functions
117
7-3-4 Fatal Errors
PC operation and program execution will stop and all outputs from the PC will be
turned OFF when any of these errors have occurred. CPM2B operation can’t be
restarted until the PC is turned off and then on again or a Programming Device is
used to switch the PC to PROGRAM mode and clear the fatal error.
All CPU Board indicators will be OFF for the power interruption error. For all
other fatal operating errors, the POWER and ERR indicators will be lit. The RUN
indicator will be OFF.
Message FALS
No.
Meaning and appropriate response
Power interruption
(no message)
00 Power has been interrupted for more than 2 ms.
Check power supply voltage and power lines. Try to power-up again.
MEMORY ERR F1
AR 1308 ON: There is a non-existent bit or word address in the user program. Check
the program and correct errors.
AR 1309 ON: An error has occurred in flash memory. Replace the CPU Board.
AR 1310 ON: A checksum error has occurred in read-only DM (DM 6144 to DM 6599).
Check and correct the settings in the read-only DM area.
AR 1311 ON: A checksum error has occurred in the PC Setup. Initialize the PC Setup
and input the settings again.
AR 1312 ON: A checksum error has occurred in the program. Check the program and
correct any errors detected.
AR 1313 ON: A checksum error has occurred in the expansion instructions data and all
function codes have been set the their default values. Reset the expansion
instructions.
AR 1314 ON: Data was not maintained in an area specified for holding. Clear the error,
check the data in the areas specified for holding, and try again.
NO END INST F0 END(01) is not written in the program. Write END(01) at the end of the program.
I/O BUS ERR C0 An error has occurred during data transfer between the CPU Board and an Expansion
I/O Board. Check the Board’s connecting cable.
I/O UNIT OVER E1 Too many Expansion I/O Boards have been connected. Check the Board configuration.
SYS FAIL FALS**
(** is 01 to 99 or 9F.)
01 to 99 A FALS(07) instruction has been executed in the program. Check the FALS number to
determine the conditions that caused execution, correct the cause, and clear the error.
9F The cycle time has exceeded the Maximum (Watch) Cycle Time setting (DM 6618).
Check the cycle time and adjust the Maximum Cycle Time setting if necessary.