17-86 Homing Flag Behavior
Select when the Homing Ok signal shall be cleared.
Option:
Function:
operations. The option is a typical selection
when using incremental encoder and the
position tracking is lost at power 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 sensor less control as
position tracking is lost when motor is
coasted.
[2]
Clear at
Coast
Running
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
sensor less control with a mechanical brake
holding the position at stand still.
[3]
Clear at
Homing
Only
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 automat-
ically set to the offset calculated by:
Parameter 17-74 = (Parameter 17-82.0) -
(Position value read from encoder).
Start a new homing to re-calculate Parameter
17-74 e.g. after replacing the encoder.
3.17.7 17-9* Position Configuration
17-90 Absolute Position Mode
Option:
Function:
NOTICE
This parameter is only available with
software version 48.XX.
Select the behavior when executing consecutive
absolute positioning commands.
[0]
*
Standard When the frequency converter receives a new
absolute positioning command while the
previous positioning command is still in progress,
it executes the new positioning command
immediately without completing the previous
positioning.
[1]
Buffered When the frequency converter receives a new
absolute positioning command while the
previous positioning command is still in progress,
it completes the previous command first and
then executes the new positioning command.
Only 1 positioning command can be buffered at
a time.
17-91 Relative Position Mode
Option:
Function:
NOTICE
This parameter is only available with
software version 48.XX.
Select which reference to use for relative
positioning commands.
[0]
*
Target
Position
The frequency converter uses the latest
target position as reference for the new
positioning command. The frequency
converter executes the new positioning
command immediately without completing
the previous positioning.
The new target is calculated with the
formula: New target = previous
position reference.
[1]
Buffered
Target Pos.
The frequency converter uses the latest
target position as reference for the new
positioning command. The frequency
converter executes the new positioning
command when it completes the previous
command. Only 1 positioning command can
be buffered at a time.
[2]
Commanded
Position
The frequency converter uses the
commanded position as reference for the
new positioning command. The frequency
converter executes the new positioning
command immediately without completing
the previous positioning.
The new target is calculated with the
formula: New target = commanded position
+ position reference.
[3]
Actual
Position
The frequency converter uses the actual
position as reference for the new
positioning command. The frequency
converter executes the new positioning
command immediately without completing
the previous positioning.
The new target is calculated with the
formula: New target = actual po
position reference.
17-92 Position Control Selection
Option:
Function:
NOTICE
This parameter is only available with
software version 48.XX.
This parameter allows to select the position
control mode without using a digital input
signal or a fieldbus bit.
Parameter Descriptions
Programming Guide
MG33MP02
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Summary of Contents for VLT AutomationDrive FC 302
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