Mitsubishi Electric SV13/22 Programming Manual page 220

7. POSITIONING CONTROL
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REMARKS
(Note): The external CHANGE signal is an external input to the A172SENC
DOG/CHENGE terminal. When "normally open contact input" is set in
the system settings, CHANGE input occurs when the DOG/CHANGE
signal comes ON, and when "normally closed contact input" is set,
CHANGE input occurs when the DOG/CHANGE signal goes OFF.
(See the A173UHCPU/A172SHCPU/A171SHCPU Motion Controller
User's Manual for details.)
(3) Feed current value processing
The feed current value is determined in one of the following two ways according
to the ON/OFF status of M1812+20n (feed current value update request
command) when speed/position switching control is started.
(a) M1812+20n ........
OFF
(b) M1812+20n ........
ON
[M1812 20n OFF]
+
Speed control
Feed
0
* *
current
value
OFF
M1812
+20n
search engine
• The feed current value is cleared to zero at the start
of speed/position switching control.
• The feed current value is updated from the start of
control (speed control).
• The feed current value after control is stopped is as
follows:
Feed current Travel value
=
value after under speed
stopping control
• The feed current value is not cleared at start of
speed/position switching control.
• The feed current value is updated from the start of
control (speed control).
• The axis makes a deceleration stop if the feed current
value exceeds the stroke limit.
• The feed current value after control is stopped is as
follows:
Feed current Address
=
value after before speed
stopping control
[M1812 20n ON]
CHANGE input
Position control
Feed
current
value
Feed current value updated
Feed current value cleared
M1812
+20n
7 − 68
Travel value
+
under position
control
Travel value Travel value
+ +
under speed under position
control control
+
CHANGE input
Speed control Position control
* * * *
Feed current value updated
Feed current value held
ON
OFF