502
Operating Errors
Section 8-5
Note
** is 01 to 99, 9D, 9C, or 9B.
Communication Errors
If an error occurs in communications through the peripheral port or built-in
RS-232C port, the corresponding indicator (PRPHL or COMM) will stop flash-
ing. Check the connecting cables as well as the programs in the PC and host
computer.
Reset the communications ports with the Port Reset Bits, SR 25208 and
SR 25209.
Output Inhibit
When the OUT INH indicator is lit, the Output OFF Bit (SR 25215) is ON and
all outputs from the CPU Unit will be turned OFF. If it is not necessary to have
all outputs OFF, turn OFF SR 25215.
SYS FAIL FAL**
(see note)
9C
Check the contents (two digits BCD) of AR 0400 to AR 0407 (error codes for Inner
Board inserted in slot 1) and correct as directed.
01, 02 Hex: An error has occurred in the hardware. Turn the power OFF, and then
power up again. If the error persists, replace the Inner Board.
03 Hex:
The PC Setup (DM 6650 to DM 6559, DM 6613, DM 6614, DM 6602,
DM 6603, DM 6640, DM 6641) settings are incorrect. Correct the settings.
10 Hex:
An error has occurred in the Serial Communications Board. Check flags
and status information in memory for the Serial Communications Board
and correct the error accordingly.
An error has occurred in the Inner Board inserted in slot 1 or slot 2.
Check the contents (two digits BCD) of AR 0408 to AR 0415 (error codes for Inner
Board inserted in slot 2) and correct as directed.
01, 02 Hex: An error has occurred in the hardware. Turn the power OFF, and then
power up again. If the error persists, replace the Inner Board.
03 Hex:
The PC Setup (DM 6611, DM 6612, DM 6643, DM 6644) settings are
incorrect. Correct the settings.
04 Hex:
CQM1H operation was interrupted during pulse output (when CQM1H-
PLB21 is mounted). Check to see whether the device receiving the pulse
output was affected.
9B
An error has been detected in the PC Setup. Check flags AR 2400 to AR 2402, and cor-
rect as directed.
AR 2400 ON: An incorrect setting was detected in the PC Setup (DM 6600 to DM 6614)
when power was turned ON. Correct the settings in PROGRAM Mode and turn on the
power again.
AR 2401 ON: An incorrect setting was detected in the PC Setup (DM 6615 to DM 6644)
when switching to RUN Mode. Correct the settings in PROGRAM Mode and switch to
RUN Mode again.
AR 2402 ON: An incorrect setting was detected in the PC Setup (DM 6645 to DM 6655)
during operation. Correct the settings and clear the error.
SCAN TIME OVER
F8
Watchdog timer has exceeded 100 ms. (SR 25309 will be ON.)
This indicates that the program cycle time is longer than recommended. Reduce cycle
time if possible.
BATT LOW
F7
Backup battery is missing or its voltage has dropped. (SR 25308 will be ON.)
Check the battery and replace if necessary. Check the PC Setup (DM 6655) to see
whether a low battery will be detected.
SIOU_ERR
D0
An error has occurred during data transfer between the CPU Unit and the Controller
Link Unit, or in the Controller Link Unit itself. (SR 25413 and AR 0011 will be ON.)
Turn the power OFF, and then ON again. If the error persists, replace the Controller Link
Unit.
Message
FAL No.
Meaning and appropriate response
