Operation Error Flag; Write During Run - Mitsubishi Electric Melsec-F FX3GC Series User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
Built-in Positioning Functions
4.7.5

Operation Error Flag

When there is an error in the applied instruction configuration, target device or target device number range
and an error occurs while operation is executed, the following flag turns ON and the error information is
stored.
1. Operation error
Error flag
M8067
• When an operation error has occurred, M8067 is set, D8067 stores the operation error code number in
which the error has occurred.
• In the FX /FX
3U
When the error occurrence step is up to the 32767th step, the error occurrence step can be checked in
D8069 (16 bits).
• In the FX /FX
3S
• If an operation error occurs at another step, the error code and error step number of the instruction will be
sequentially updated. (If the error status is canceled, the error flag will be turned off.)
• If the PLC is stopped and restarted without canceling the error status, the error status will be automatically
canceled, but immediately after that, the error flag will be turned on again.
2. Operation error latch
Error flag
M8068
• When an operation error occurs, M8068 is turned on.
• In the FX /FX
3U
When the error occurrence step is up to the 32767th step, the error occurrence step can be checked in
D8068 (16 bits).
• In the FX /FX
3S
• If a new error is caused by another instruction, the error data will not be updated, and the operation will be
continued until the "forced reset" command is input or the power is turned off.
4.7.6

Write during RUN

Do not change the program if a positioning instruction (FNC150, FNC151, FNC156 to FNC159) is being
executed (pulses are being output) in the RUN mode. Operations will be performed as shown in the following
table if a program is changed during instruction execution in RUN mode.
Also do not change the program if a pulse output instruction (FNC 57, FNC 58 and FNC 59) is being executed
(pulses are being output) in RUN mode.
For details on the pulse output instruction (FNC 57, FNC 58 and FNC 59), refer to Programming
DSZR(FNC150)
DVIT(FNC151)
TBL(FNC152)
ZRN(FNC156)
During operation with acceleration/deceleration
PLSV
(FNC157)
During operation without acceleration/deceleration
DRVI(FNC158)
DRVA(FNC159)
B - 84
PLC User's Manual - Positioning Control Edition
Error code storage device
D8067
PLC, D8315 and D8314 (32 bits) store the error occurrence step number.
3UC
/FX PLC, D8069 stores the error occurrence step number.
3G 3GC
Error code storage device
-
PLC, D8313 and D8312 (32 bits) store the error occurrence step number.
3UC
/FX PLC, D8068 stores the error occurrence step number.
3G 3GC
For details on the positioning instruction, refer to Chapter 6 to 11.
Instruction
4.7 Items To Be Observed in Programming
Error detected step number storage device
FX /FX PLC
3U 3UC
D8315, D8314
D8069
Error detected step number storage device
FX /FX PLC
3U 3UC
D8313, D8312
D8068
If program is changed in circuit block
including currently-activated instruction
Decelerates and stops pulse output.
Program cannot be changed in the RUN mode.
Decelerates and stops pulse output.
Decelerates and stops pulse output.
Immediately stops pulse output.
Decelerates and stops pulse output.
4 Before Programming
FX /FX /FX PLC
3S 3G 3GC
D8069
FX /FX /FX PLC
3S 3G 3GC
D8068
manual.