ABB ACSM1 - Page 75

Drive control and features
75
Master/Follower distance correction
The purpose of the master/follower distance correction is to measure the distance
between the two probe positions and compare it with the distance between
reference positions 62.16 PROBE1 POS and 62.18 PROBE2 POS. If there is
a deviation, a correction is carried out on both the drive synchron reference 4.16
SYNC REF GEARED and actual position 1.12 POS ACT.
Note: In master/follower distance correction, the follower must always be in
synchron control mode. If the follower is not used in synchron control mode,
adjusting the drive synchron reference (4.16 SYNC REF GEARED) will not affect the
operation of the drive, and the correction cannot be carried out properly.
Example 1: Roll-over axis application. Master and follower proximity switches are
located at 0°.
Parameter Setting Information
60.02 POS AXIS MODE (1) Rollover Positioning is between 0 and 1 revolutions, ie,
after 360°, the position calculation starts from 0°
again.
60.05 POS UNIT (1) Degree All position values are in degrees
68.02 SYNC GEAR MUL Same as for 68.03
SYNC GEAR DIV
Synchron gear ratio is 1.
62.14 CYCLIC CORR
MODE
(5) Cor M/F Dist Cyclic master/follower distance correction
62.15 TRIG PROBE1 (1) ENC1 DI1 _– Rising edge of encoder 1 digital input DI1.
Source of the actual position latching command
(proximity switch signal source)
62.17 TRIG PROBE2 (3) ENC1 DI2 _– Rising edge of encoder 1 digital input DI2.
Source of the master position latching command
(proximity switch signal source)
62.16 PROBE1 POS 0° Reference position for the actual position probe
62.18 PROBE2 POS -120° Reference position for the master position probe,
ie, follower is 120° [(0°-120°)-(0°-0°)] behind the
master.