Operation Error - Mitsubishi Electric A800 Programming Manual

3.22

Operation error

An operation error occurs in the basic instruction in the following cases.
When an error listed in the description of each instruction occurs.
POINT POINT
• Note that an operation error does not occur when the device specified range exceeds the corresponding device range, and
data is written to devices other than the specified device.
Error processing
If an operation error occurs when a basic instruction is executed, SM0 turns ON and an error code is stored in SD0.
(SM0 remains ON even if subsequent processing is normal.)
• The error code of the instruction in which the operation error occurred when SM0 changed from OFF to ON is stored in
SD0. Therefore, the content of SD0 does not change when SM0 remains ON.
• The following type of program resets SD0 and SM0.
• When an operation error occurs, the choice of whether to stop or continue sequence processing can be made in the
PLC function parameter settings. For details, refer to
Reset command
Reset command
page
M50 to M65 are the targets, but actual
setting range is M0 to M63, and error occurs
since M64 and M65 do not exist.
Resets (turns off) SM0.
RST SM0
Resets SD0.
RST SD0
(Clears SD0 to 0.)
99.

Operation error

Sequence program
3
107