9-5
Section
Operating Errors
554
9-5-2 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.
All CPU Unit indicators will be OFF for the power interruption error. For all other
fatal operating errors, the POWER and ERR/ALM 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 at least 10 ms. Check power supply voltage and power
lines. Try to power-up again.
MEMORY ERR
F1
AR 1308 ON: An unspecified bit area exists in the user program. Check the program
and correct errors.
AR 1309 ON: An error has occurred in the flash memory. Since the number of writings
to the flash memory has exceeded the specified level, replace the CPU Unit.
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 all of the PC
Setup and re-input.
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 instruction’s function
code assignment area. Expansion instruction function codes will be returned to default
settings. Assign function codes again.
AR 1314 ON: Power interruption hold area was not held. Clear the error and reset the
settings of the power interruption hold area.
AR 1315 ON: An error has occurred in CompoBus/S communications. If the error
cannot be corrected, replace the CPU Unit (SRM1(-V2) only).
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
(See note 1.)
C0
An error has occurred during data transfer between the CPU Unit and an Expansion
Unit or Expansion I/O Unit. Check the Unit’s connecting cable.
I/O UNIT OVER
(See note 1.)
E1
Too many Expansion Units or Expansion I/O Units have been connected. Check the
PC configuration.
SYS FAIL FALS**
(See note 2.)
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 FALS 9F Cycle Time Monitoring Time (DM 6618).
Check the cycle time and adjust the Cycle Time Monitoring Time if necessary.
Note
1. CPM1/CPM1A/CPM2A/CPM2C only.
2. ** is 01 to 99 or 9F.
9-5-3 Other Errors
The PWR indicator will be ON for the following fatal errors. Ignore the status of
other indicators unless a specific status is given in the following table.
Error status
FALS
No.
Meaning and appropriate response
CompoBus/S
communications error
None
The ERC indicator will light to indicate an error in CompoBus/S communications.
Check the slaves and the transmission path and restart the system.
RS-232C port
communications error
None
If an error occurs in communications through the RS-232C port, the COMM
indicator will be OFF and the error flag (AR 0804) will be ON. Check the
connecting cables and restart.
Peripheral port
communications error
None
If an error occurs in communications through the peripheral port, the COMM
indicator will be OFF and the error flag (AR 0812) will be ON. Check the
connecting cables and restart.
