Handling Of Operation Error Flag - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
6.5.3

Handling of 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 turns ON and D8067 stores the operation error code
number.
• In the FX /FX
3U
occurred.
When the error occurrence step number is up to 32767, the error occurrence step can be checked also in
D8069 (16 bits).
• In the FX
3G
• If another error occurs in another step, the stored data is updated in turn to the error code and step number
of the new error. (These devices are set to OFF when errors are cleared.)
• When the PLC mode switches from STOP to RUN, these devices are cleared instantaneously, and then
set to ON again if errors have not been cleared.
2. Operation error latch
Error flag
M8068
• When an operation error has occurred, M8068 turns ON.
• In the FX /FX
3U
occurred.
When the error occurrence step number is up to 32767, the error occurrence step can be checked also in
D8068 (16 bits).
• In the FX
3G
• Even if another error has occurred in another step, the stored data is not updated, and remains held until
these devices are forcibly reset or until the power turns OFF.
• When the error occurrence step is up to the 32767th step, the error occurrence step can be checked in
D8068 (16 bits).
184
Error code storange device
D8067
PLCs, D8315 and D8314 (32 bits in total) store the step number in which the error has
3UC
PLC, D8069 stores the error occurrence step number.
Error code storange device
−
PLCs, D8313 and D8312 (32 bits in total) store the step number in which the error has
3UC
PLC, D8068 stores the error occurrence step number.
6 What to Understand before Programming
6.5 General Rules for Applied Instructions
Error detected step number storange device
FX /FX PLC
3U 3UC
D8315, D8314, D8069
Error detected step number storange device
FX /FX PLC
3U 3UC
D8315, D8314, D8068
FX PLC
3G
D8069
FX PLC
3G
D8068