44 Program features
Any mechanical gear ratios between the components (motor, motor encoder, load,
load encoder) are specified using the gear parameters shown in the diagram below.
Any gear ratio between the load encoder and the load is defined by
and
. Similarly, any gear ratio between the
motor encoder and the motor is defined by
and
. In case the internal estimated position is chosen as
load feedback, the gear ratio between the motor and load can be defined by
. By default, all of the ratios
mentioned above are 1:1. The ratios can only be changed with the drive stopped;
new settings require validation by
.
Position counter
The control program contains a position counter feature that can be used to indicate
the position of the load. The output of the counter function, parameter
, indicates the scaled number of revolutions read from the selected
source (see section
on page
The relation between revolutions of the motor shaft and the translatory movement of
the load (in any given unit of distance) is defined by parameters
and
. This gear function can be changed
without the need of a parameter refresh or position counter reinitialization – however,
the counter output is only updated after new position input data is received.
For detailed parameter connections of the load feedback function, see the block
diagram on page
.
X
Y
X
Y
X
Y
X
Y
X
Y
1
Load encoder to load
scaling
Load encoder
Load
M
Motor
encoder
Motor to load
scaling
Motor encoder to motor
scaling
e
e
Summary of Contents for ACS860
Page 1: ... ABB INDUSTRIAL DRIVES ACS860 primary control program Firmware manual ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 54: ...54 Program features ...
Page 78: ...78 Program features ...
Page 90: ...90 Application macros ...
Page 342: ...342 Additional parameter data ...
Page 380: ...380 Fault tracing ...
Page 381: ...Fault tracing 381 ...
Page 382: ...382 Fault tracing ...
Page 436: ...436 Control chain diagrams ...
