ABB ACSM1 Firmware Manual page 68

68
Example:
The following figure shows a conveyer system where a box should be positioned.
The conveyer belt is marked every 40 mm.
Encoder DI1
Parameter
60.02 POS AXIS MODE
60.05 POS UNIT
62.14 CYCLIC CORR MODE (3) 1 PROBE DIST
62.15 TRIG PROBE1
62.16 PROBE1 POS
62.18 PROBE2 POS
• Rising edge of encoder DI1 (proximity switch signal) is detected at the first mark
of the belt. Position 0 mm is stored to signal
• Next rising edge of encoder DI1 (proximity switch signal) is detected at the
second mark of the belt. Position 30 mm is stored to signal
MEAS.
• The reference distance between the marks is 40 mm and the measured distance
between the marks is 30 mm, thus the error is 10 mm:
Drive control and features
ENCODER MOTOR GEARBOX
M
3~
Setting
(0) LINEAR
(2) METER
(1) ENC1 DI1 _-
0 m
0.040 m (= 40 mm)
1.01 SPEED ACT
Encoder DI1
1.12 POS ACT
40 mm
PROXIMITY SWITCH
Information
Positioning between minimum position
MINIMUM POS
MAXIMUM POS
All position values are in metres
Distance correction with one probe
Rising edge of encoder 1 digital input DI1.
Source of the actual position latching
command (proximity switch signal source)
Reference position for position probe 1
Reference position for position probe 1
t
t
POSITION DERIVATION
MEASURED POSITION DIFFERENCE
t
4.03 PROBE1 POS
60.14
and maximum position 60.13
MEAS.
4.04 PROBE2 POS