Mitsubishi Electric QD75MH1 User Manual page 466

9 MAJOR POSITIONING CONTROL
V
Speed control Position control
Maintained
(a) Current feed value not updated
Current feed value during speed-position switching control (INC mode)
The following table shows the "
switching control (INC mode) corresponding to the "
during speed control" settings.
Pr.21
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
V
t
Updated
(b) Current feed value updated
Switching time from speed control to position control
There is 1ms from the time the speed-position switching signal is turned ON to the
time the speed-position switching latch flag (
Speed-position switching signal
Speed-position switching latch flag
Md.20 Current feed value" during speed-position
The current feed value at control start is maintained during
speed control, and updated from the switching 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 switching to position control.
Speed control
Position control
Updated
ON
OFF
OFF
9 - 87
Pr.21
Current feed value
Md.20 Current feed value
V
Speed control Position control
t
0
(c) Current feed value zero cleared
Md.31 Status: b1) turns ON.
ON
1ms
MELSEC-Q
t
Updated from 0