ABB ACSM1 Series, Manual

Page: 61 / 510

Drive control and features
61
Load encoder gear function
Positioning uses the measured speed and position of the load. The load encoder
gear function calculates the actual load position on the basis of the measured motor
shaft position.
Load encoder gear application examples:
The load encoder gear parameters 60.03 LOAD GEAR MUL and 60.04 LOAD
GEAR DIV are set as follows:
Note: The sign of the programmed gear ratio has to match the sign of the
mechanical gear ratio.
M
3~
Positioning uses the measured
speed and position of the load. If no
encoder is mounted on the load
side, the load encoder gear function
must be applied in order to calcu-
late the actual load position on the
basis of the measured motor shaft
position.
This configuration also works with
the estimated position besides en-
coder 1.
A second encoder (encoder 2)
mounted on the load side is used as
the source for the actual position
value. (Note: Inverted gear ratio is
considered when the position con-
trol output (speed reference) is pro-
duced).
If the second encoder is an abso-
lute encoder, it must be configured
as encoder 1.
This configuration does not work
with the estimated position besides
encoder 1 because the motor gear
ratio is internally set to 1:1 with the
estimated speed.
M
3~
ENCODER 1 LOAD GEAR MOTOR
=
60.03 LOAD GEAR MUL
60.04 LOAD GEAR DIV
Load speed
Encoder 1/2 speed