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8. TROUBLESHOOTING
MELSEC-A
8.1.5 AlSD71
positioning start errors during BUSY
The following errors are detected when the drive unit ready
signal is turned
OFF while A1 SD71 is BUSY or when positioning is stopped during zero return.
Table 8.7
BUSY Error
Codes
Cause
Corrective Action($)
8.1.6
Other errors
Zero return is stopped.
Zero return is not allowed more than twice con-
81
secutively. If necessary, return to the position
before near-point dog using a jog operation or
positioning by specifying the data number, and
restart zero return.
Error
2odo
1
Data Type
4
Parameter
processing
Start
error
4
Start data
error
Buffer
write-pro-
tected
Check Point
Positioning mode
Emergency
deceleration time
Restart area
Start number
Travel distance
change area
Setting travel
distance area
Corrective Action($)
Data is set outside the range from 0 to 2 .
Data is set outside the range from 64 to
50000 (msec).
Interpolation is started in the speed/position-
ing control switching mode.
In the switching mode:
Restarted after a stop during speed control.
Restart after completing positioning.
The restart number is different from execut-
ing number.
Data is set outside the range from 0 to the
stroke upper limit.
Data is written from the PC CPU to a write-
protected area.
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