Mitsubishi Electric M800VW Series Programming Manual page 847

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.34 PLC Axis Indexing
Short-cut control
This function automatically judges the direction for the least rotation when positioning the axis to a station in automatic mode.
When the shortcut control is enabled ("#12802 aux_Cont1/bit9" is set to "1"), the axis will be rotated and positioned in the
direction for the least rotation. (The rotation angle will be below 180 degrees.)
If 180 degrees rotation is required, rotate the axis in the direction set with the parameter "#1018 ccw".
Note
(1) The parameter "#8213 Rotation axis type" is disabled in PLC axis indexing.
Special operation with special station No.
A special operation with one-station rotation will be carried out when station No. 0 is designated and the Operation start (ST)
signal is ON. At this time, the operation will differ depending on whether the machine position is inside or outside the "near"
range.
 For rotation axis
Machine posi-
Station No.
tion at start
Inside the
"near" range
(a)
(b) 0
Outside of the
(c)
"near" range
[Special operation of rotation axis]
Axis position at
start signal ON
Station 1
"Near" range
Station 2
(a)
IB-1501668-B
#12802
aux_Cont1.bit9
Positioning is carried out to the next station in the designat-
-
ed rotation direction.
Positioning is carried out to the nearest station in the short-
1
cut rotation direction.
Positioning is carried out to the nearest station in the des-
0
ignated rotation direction.
Axis position at
start signal ON
Station 1
"Near" range
Station 2
(b)
826
Positioning operation
Axis position at
start signal ON
Station 1
"Near" range
Designated rotation
direction
Station 2
(c)