Danfoss VLT AutomationDrive FC 301 Programming Manual page 96

Parameter Descriptions
3-26 Master Offset
Range:
3 3
3-27 Virtual Master Max Ref
Range:
50.0 Hz
*
Hz]
3-28 Master Offset Speed Ref
Range:
1500 RPM
*
RPM]
3-32 Ramp Speed Ref
Range:
0 RPM
*
RPM]
94
Function:
word. Parameter 3-02 Minimum
Reference defines the maximum
deviation from the actual master
speed during the execution of the
offset.
Function:
NOTICE
[0.0 - 590.0
This parameter is available
only with software version
48.XX.
Enter the maximum reference for
the virtual master. The actual
reference is set relative to this value
using the source selected in
parameter 3-15 Reference Resource 1
or fieldbus reference 1. The rotation
direction is controlled by the
forward/reverse signal on a digital
input or fieldbus. Use parameter
group 3-6* Ramp 3 to configure
acceleration and deceleration.
Function:
NOTICE
[0 - 65000
This parameter is only
available with software version
48.XX.
Enter the speed reference for
changing the master offset in
synchronization mode. To ensure
compatibility with software versions
48.01 and 48.10, this parameter is
only active when
parameter 3-02 Minimum Reference
is set to 0.
Function:
[0 - 1000000 Enter a value to specify the ramp
speed reference. When 0 is
specified, the ramp speed is
selected based on the settings in
parameter 1-23 Motor Frequency for
induction motors and
parameter 1-25 Motor Nominal Speed
for synchronous motors.
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VLT AutomationDrive FC 301/302
3-32 Ramp Speed Ref
Range:
3-33 Sync. Mode & Start Behavior
Option:
[0]
*
[1]
[2]
[10]
Function:
When a value greater than 0 is
specified, the ramp speed reference
is used to accelerate or decelerate
irrespective of motor type or data.
Function:
NOTICE
This parameter is only valid
with software version 48.XX.
Select the type of synchronization
and start mechanism for synchroni-
zation mode. Marker
synchronization is enabled when
options [10], [11], or [12] is selected.
Relative Sync. Follower position is locked to
master position at start when
Enable Reference is active.
Relative Re- Position of the follower drive stays
Sync. locked to master drive's position
when Enable Reference is active,
though the drive is stopped or
coasted. For example, when the
drive is restarted after an alarm, the
follower drive realigns with the
master drive.
Absolute Sync. Position of the follower drive is
always locked to the position of
master drive.
Marker Controls the behaviour of first
Shortest marker synchronization. Marker
synchronization start up behaviour
depends on parameter 3-34 Marker
Distance:
•
When
parameter 3-34 Marker
Distance = 0 (OFF), the 1
follower marker is aligned
with the first master
marker.
•
When
parameter 3-34 Marker
Distance > 0, the 1
follower marker is aligned
with the closest master
marker to accelerate or
decelerate to the correct
position by a maximum of
half the marker distance.
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M0013101