Mitsubishi Electric M800VW Series Programming Manual page 868

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.34 PLC Axis Indexing
Setting for station No. automatic assignment direction
The station No. assignment direction can be selected with parameters.
#1018 ccw
Assign the station Nos. in the motor rotation CW direction. When forward run is selected in "Rotation direc-
0
tion" (DIR), the motor rotates in the CW direction (in the station No. increment direction).
Assign the station Nos. in the motor rotation CCW direction. When forward run is selected in "Rotation direc-
1
tion" (DIR), the motor rotates in the CCW direction (in the station No. increment direction).
By turning ON the power again after changing the "#1018 ccw" setting, the set station positions will be modified.
POINT
Changing the "#1018 ccw" setting in absolute position detection system requires the initial setting. Set this param-
eter before the initial setting.
Precautions
(1) Special operation by special station No. (0) is invalid in arbitrary coordinate assignment. This will cause an operation error
"M01 165 Aux uneven index sta No. ilgl".
(2) To set more than 20 coordinates in the arbitrary coordinate assignment, execute the positioning with arbitrary coordinate
commands.
(3) If two or more station Nos. have the same coordinate, the smallest station No. will be output when the axis stays within
the station neighborhood in non-automatic operation mode.
(4) The smallest station No. will also be output when the axis is at the same distance from two or more stations.
(5) Zero point setting
Auxiliary axis (MR-J2-CT) and PLC axis indexing have the following differences in operation.
Coordinate zero point will be decided first and refer-
ence position will be decided by parameter. Setting a
station offset does not shift the coordinate zero point
Dog-less type (station 1 position): it shifts the reference position in-
stead. In this case, a zero point setting in absolute po-
sition screen is required to shift the coordinate zero
point.
Explanations
Auxiliary axis (MR-J2-CT) PLC axis indexing
Coordinate zero point will be decided first, which
will be the reference position as well. Setting a sta-
tion offset sets the station 1 on the position an off-
set amount away from the original position.
847 IB-1501668-B