Mitsubishi Electric MELSEC-Q Series - Page 289

6 - 102
6 POSITIONING CONTROL
(3) Feed current value processing
The feed current value is as follows by turning feed current value update
command (M3212+20n) on/off at the speed-position switching control start.
(a) M3212+20n OFF......
• The feed current value is cleared to "0" at the start.
• The feed current value is updated from the start
(speed control).
• The feed current value after stop is as follows:
Feed current
value after stop
Travel value
during speed
control
Travel value
for position
control
=+
(b) M3212+20n ON..…..
• The feed current value is not cleared at the start.
• The feed current value is updated from the start
(speed control).
• The feed current value after stop is as follows:
=
+
+
Feed current
value after stop
Travel value
during speed
control
Travel value
for position
control
Address
before speed
control start
0
Feed
current
value
OFF
M3212
+20n
OFF
* *
[M3212+20n OFF] [M3212+20n ON]
CHANGE input CHANGE input
ON
M3212
+20n
* ** *
Feed
current
value
Update feed current value
Speed
controlling
Position
controlling
Speed
controlling
Position
controlling
Update feed current value
Clear feed current value
POINT
If it is started with M3212+20n on, leave M3212+20n on until positioning control is
completed. If it is turns off during control, the feed current value cannot be
guaranteed.