Mitsubishi Electric MELSEC-Q-MR-JE-C Reference Manual page 58

Function overview
Item
Applicable hardware and
software
Language
Number of basic steps
Function description
Restrictions and precautions
FB operation type
Timing chart
3 FB LIBRARY
56
3.2 Details of the FB Library
Description
Applicable CPU
Applicable engineering tool
Structured Text
103 steps
This FB reads the error number of the specified axis.
The FB is executed when Enable turns ON, and the error number of the specified axis is read.
Read data is always updated while Valid is ON.
When no error has occurred in the specified axis, 0 is returned to AxisErrorID.
When an error has occurred in the FB, this FB turns ON Error and stores an error code in ErrorID.
For details of error codes, refer to  Page 61 Troubleshooting.

Pulsed execution (multiple scan execution type)
[Normal completion]
Enable
AxisErrorID
Valid
Error
ErrorID
[Error completion]
Enable
AxisErrorID
Valid
Error
ErrorID
0
QnUDVCPU
GX Works2
Axis error No.
0
Error code