Danfoss VLT AutomationDrive FC 301 Programming Guide

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Parameter 3-33 Sync Mode & Start Behavior
Table 215: Parameter 3-33 Sync Mode & Start Behavior
3-33 Sync Mode & Start Behavior
Default value: [0] Relative Sync
Parameter type: Option
Setup:
Conversion index: -
Data type: Uint8
Change during operation:
N O T I C E
This parameter is only available with software version 48.XX.
Select the type of synchronization and start mechanism for synchronization mode. Marker synchronization is enabled when options
[10] Marker Shortest, [11] Marker Catch Up, or [12] Marker Slow Down is selected.
Op-
tion
Name
Description
[0]*
Relative
Sync.
The follower position is locked to the master position at start, then Enable Reference is active.
[1]
Relative
Re-Sync.
The position of the follower drive stays locked to the master drive's position when Enable Reference is ac-
tive, 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.
[2]
Absolute
Sync.
The position of the follower drive is always locked to the position of the master drive.
[10]
Marker
Shortest
Controls the behavior of the 1
st
marker synchronization. Marker synchronization start-up behavior de-
pends on parameter 3-34 Marker Distance:
When parameter 3-34 Marker Distance = 0 (OFF), the 1
st
follower marker is aligned with the 1
st
master
marker.
When parameter 3-34 Marker Distance > 0, the 1
st
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.
[11]
Marker
Catch Up
Select this option to accelerate the follower to reach the position of the previous master marker during
marker synchronization.
[12]
Marker
Slow
Down
Select this option to decelerate the follower to align with the subsequent master marker during marker
synchronization.
[13]
Mar. Dis.
Meas. Fo.
Select this option to measure the follower marker distance while synchronizing without marker correction,
when the master is running. The measured follower marker distance is set in parameter 3-34 Marker Dis-
tance.
[14]
Mar. Dis.
Meas. Ma.
Select this option to measure master marker distance while synchronizing without marker correction,
when the master is running. The measured master marker distance is set in parameter 3-34 Marker Distance.
[15]
Mar. meas.
shortest
Continuous measurement of distance between master and follower marker where the behavior depends
on parameter 3-34 Marker Distance.
Parameter 3-34 Marker Distance = 0 (OFF): Distance is measure between the 1
st
follower marker and the
1
st
master marker no matter which one comes first, this is considered as the 1
st
pair of markers. Dis-
tance will then be measured between every following pairs of master and follower markers.
Parameter 3-34 Marker Distance > 0: At every follower marker distance is measured to the closest mas-
ter marker.
The result of the measurement is updated in parameter 18-24 Marker Pos. Offset in position units as defined
in parameter group 17-0* Position Scaling.
AU275636650261en-000101 / 130R0334 | 139Danfoss A/S © 2022.12
Parameter Descriptions
VLT AutomationDrive FC 301/302
Programming Guide

Danfoss VLT AutomationDrive FC 301 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 301
Category	DC Drives
Language	English