66 Standard programposi features
Position counter
The control program contains a position counter feature that can be used to indicate
the position of a load, eg. the position of a conveyor belt or the height of the load on a
crane. The output of the counter function, parameter
,
indicates the scaled number of revolutions read from an encoder through either
encoder interface. A position estimate calculated internally by the motor control can
be used instead of encoder feedback. (The estimate is also used until next stop if the
selected feedback is lost and its monitoring parameter is set to warning instead of
fault.)
The source of the measurement is selected by
. Any
gear ratio between the encoder and load is defined by
and
. In case the internal position estimate is chosen as
the source, the gear between the motor and load must be defined in
and
.
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
.
By default, all of the ratios mentioned above are 1:1.
M
X
Y
e
X
Y
X
Y
X
Y
X
Y
e
e
e
Position
initialization
Encoder 1
Load
Encoder 2
Encoder 1
Encoder 2
Position estimate
Summary of Contents for ACS880 ESP
Page 1: ...ABB industrial drives Firmware manual ACS880 PCP ESP control program ...
Page 4: ......
Page 28: ...28 PCP ESP control start up ...
Page 30: ...30 Using the control panel ...
Page 94: ...94 Standard programposi features ...
Page 100: ...100 Default control connections ...
Page 360: ...360 Parameters ...
Page 436: ...436 Fault tracing ...
Page 486: ...486 Control chain diagrams ...
Page 492: ...492 Appendix ESP with step up transformer and sine filter ...
Page 494: ...Contact us www abb com drives www abb com drivespartners 3AXD50000016186 Rev B EN 2015 10 27 ...
