503
Operating Errors
Section 8-5
8-5-2
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.
!Caution
Investigate the cause of errors and take the appropriate action as soon as
possible. After removing the cause of the error, either turn the PC OFF and
ON again, or perform error clearing operations. Refer to the
CQM1H Opera-
tion Manual
for Programming Console procedures.
Message
FALS
No.
Meaning and appropriate response
Power interruption
(no message)
None
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 1611 ON: A checksum error has occurred in the PC Setup (DM 6600 to DM 6655).
Initialize all of the PC Setup and reinput.
AR 1612 ON: A checksum error has occurred in the program, indicating an incorrect
instruction. Check the program and correct any errors detected.
AR 1613 ON: A checksum error has occurred in an expansion instruction’s data. Initial-
ize all of the expansion instruction settings and reinput.
AR 1614 ON: Memory Cassette was installed or removed with the power ON. Turn the
power OFF, install the Memory Cassette, and turn the power on again.
AR 1615 ON: The Memory Cassette contents could not be read at start-up. Check flags
AR 1412 to AR 1415 to determine the problem, correct it, and turn ON the power again.
NO END INST
F0
END(01) is not written anywhere in program. Write END(01) at the final address of the
program.
I/O BUS ERR
C0
An error has occurred during data transfer between the CPU Unit and an I/O Unit.
• An I/O Unit or the End Cover is not connected properly.
• An Inner Board was connected or removed during communications.
• The End Cover is not connected correctly to the CPU Block or Expansion I/O Block.
• The power supply voltage supplied to the Expansion I/O Block is not sufficient.
• More than one I/O Control Unit or I/O Interface Unit is mounted.
Determine the location of the problem using the error code stored in AR 2400 to
AR 2415. Turn OFF the power and check the following according to the error code.
• Error code: 00 to 15 BCD
Check the mounting of the Unit allocated input words IR 000 to IR 015.
• Error code: 80 to 95 BCD
Check the mounting of the Unit allocated output words IR 100 to IR 115.
• Error code: F0 Hex
Check the mounting of the Inner Board in slot 1.
• Error code: F1 Hex
Check the mounting of the Inner Board in slot 2.
• Error code: FF Hex
Check the mounting of the End Cover on the CPU Block or Expansion I/O Block.
Check the Expansion I/O Cable length. The cable must be 0.7 m max.
Check the number of Units and the current consumption on the CPU Block and
Expansion I/O Block to see if the maximum number of Units or the power supply
capacity has been exceeded. If necessary, reconfigure the system to enable adequate
power supply.
I/O UNIT OVER
E1
The number of I/O words on the installed I/O Units exceeds the maximum. Turn OFF
the power, rearrange the system to reduce the number of I/O words, and turn ON the
power again.
SYS FAIL FALS**
(see note)
01 to 99
An FALS(07) instruction has been executed in the program. Check the FALS number to
determine the conditions that would cause 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.
