Mitsubishi Electric MELSEC-Q Series User Manual page 512

Feed current value during position-speed switching control
The following table shows the "[Md.20] Feed current value" during position-speed
switching control corresponding to the "[Pr.21] Feed current value during speed
control" settings.
"[Pr.21] Feed current value during
0: Do not update feed current value
1: Update feed current value
2: Zero clear feed current value
V
Position control Speed control
Feed
current
Updated Maintained
value
(a) Feed current value not updated
Switching time from position control to speed control
There is 1ms from the time the position-speed switching signal is turned ON to the
time the position-speed switching latch flag ([Md.31] Status: b5) turns ON.
Position-speed switching signal
Position-speed switching latch flag
speed control" setting
V
Position control
t
Feed
current
value
(b) Feed current value updated
9 - 112
Chapter 9 Major Positioning Control
[Md.20] Feed current value
The feed current value is updated during position control,
and the feed current value at the time of switching is
maintained as soon as position control is switched to
speed control.
The feed current value is updated during position control
and speed control.
The feed current value is updated during position control,
and the feed current value is cleared (to "0") as soon as
position control is switched to speed control.
Speed control
t
Updated
ON
OFF
OFF
1ms
V
Position control Speed control
Feed
current
Updated
value
(c) Feed current value zero cleared
ON
t
0