15 - 5 
MELSEC-Q
 
15   TROUBLESHOOTING 
 
[4]   Invalid operations 
For the following operations, the setting details will be invalidated, and an error or 
warning will not occur. 
 
•
 Speed change during OPR 
•
 Speed change before operation 
(Speed override change, skip command, continuous operation interruption 
request, target position change request) 
•
 Axis stop during axis stop 
•
 Axis sudden stop during axis stop 
•
 Axis stop before axis operation 
•
 Axis sudden stop before axis operation 
•
 Writing to the buffer memory monitoring area 
 
[5]   Confirming the error and warning definitions 
The error and warning definitions can be confirmed with the error and warning 
codes. Confirming them requires GX Developer or GX Configurator-QP. For 
details, refer to GX Developer Operating Manual or GX Configurator-QP 
Operating Manual. (Refer to Sections 15.2 and 15.3 for details of the error and 
warning codes.)