Mitsubishi A1SD75M3 User Manual page 411

9 MAIN POSITIONING CONTROL
Speed Speed control Position control
Maintained
(a) Current feed value not updated
Current feed value during speed/position changeover control
The following table shows the " Md.29 Current feed value" during speed/position
changeover control corresponding to the " Pr.22 Current feed value during speed
control" settings.
" Pr.22 Current feed value during
speed control" setting
0: Do not update current feed value
1: Update current feed value
2: Zero clear current feed value
Speed
t
Updated
(b) Current feed value updated
Changeover time from speed control to position control
There is 1ms from the time the speed/position changeover signal is turned ON to
the time the speed/position changeover latch flag ( Md.40 Status: b1) turns ON.
Speed/position changeover signal
Speed/position changeover latch flag
The current feed value at control start is maintained during
speed control, and updated from the changeover to
position control.
The current feed value is updated during speed control
and position control.
The current feed value is cleared (set to "0") at control
start, and updated from the changeover to position control.
Speed control
Position control
Updated
ON
OFF
OFF
1ms
9 - 53
MELSEC-A
Md.29 Current feed value
Speed Speed control
t
0
(c) Current feed value zero cleared
ON
Position control
t
Updated from 0