Op-
tion
Name
Description
[0]*
Clear at
power-up
Homing Ok
is cleared at power-up and a new homing is needed for subsequent positioning operations.
The option is a typical selection when using incremental encoder and the position tracking is lost at pow-
er-down only.
[1]
Clear at
coast
Homing Ok
is cleared at every motor coast and a new homing is needed. The option is a typical selection
for sensorless control as position tracking is lost when motor is coasted.
[2]
Clear at
coast run-
ning
Homing Ok
is cleared at motor coast only while motor is running and a new homing is needed. The option
is a typical selection for sensorless control with a mechanical brake holding the position at stand still.
[3]
Clear at
homing on-
ly
Homing Ok
is only cleared at new start of the selected homing function. The option is a typical selection
for absolute encoders. After completing the selected homing function
parameter 17-74 Position Offset
is
automatically set to the offset calculated by:
Parameter 17-74 Position Offset
= (
Parameter 17-82.0 Home
Position
) - (Position value read from encoder). Start a new homing to re-calculate
Parameter 17-74 Position
Offset
, for example, after replacing the encoder.
Parameter 17-87 Homing Activation
Table 957: Parameter 17-87 Homing Activation
17-87 Homing Activation
Default value: [0] Manual
Parameter type: Option
Setup: All setups
Conversion index: -
Data type: Uint8
Change during operation: False
N O T I C E
This parameter is only available with software version 48.XX.
Activation manner of drive homing and master homing. Master homing can be activated by a
Set Master Home
signal or the
Start
Homing
signal by selecting options
[2] Manual and Master
and
[3] Auto and Master
.
Op-
tion
Name
Description
[0]*
Manual
Activates homing function selected in
parameter 17-80 Homing Function
using the
Start Homing
signal.
[1]
Auto
Homing function selected in
parameter 17-80 Homing Function
is activated automatically when the
Homing OK
signal is low and start signal is applied.
[2]
Manual and
master
Activates homing function selected in
parameter 17-80 Homing Function
and sets the actual master po-
sition as defined in
parameter 17-88 Master Home Position
, using
Start Homing
signal.
[3]
Auto and
master
Homing function selected in
parameter 17-80 Homing Function
is activated automatically when the
Homing OK
signal is low and start signal is applied. The actual master position is set as defined in
pa-
rameter 17-88 Master Home Position
.
Parameter 17-88 Master Home Position
Table 958: Parameter 17-88 Master Home Position
17-88 Master Home Position
Default value: 0 Custom- ReadoutUnit2 Parameter type: Range, -2147483648 - 2147483647
CustomReadoutUnit2
Setup: All setups
Conversion index: 0
Data type: Int32
Change during operation: True
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Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide