Synchronization Types - Danfoss iC7 Motion Series Application Manual

Application Guide | iC7 Series Motion
The position of the follower can be further adjusted or displaced, relative to the master position, by superimposed positioning.
Superimposed positioning can either be activated manually or automatically based on sensor signals.
The signal Start Synchronizing controls the starting and stopping of synchronization. The signal can be assigned to a digital input or set
via the fieldbus control word.

Synchronization Types

2.12.3.2
There are 2 main synchronization types: position synchronizing, and marker synchronizing that has automatic correction of the master -
follower relation based on sensor signals connected to digital inputs. For position synchronizing, it is possible to select the point at which
the follower position is locked to the master position. For marker synchronizing, it is possible to select how the first marker correction is
executed. The synchronization type and behavior is selected with parameter 5.15.3.1 Sync Mode & Start Behavior. The parameter has the
following selections:
Relative Sync At Start
l
Relative Sync
l
Absolute Sync
l
Marker Catch Up
l
Marker Sync
l
Marker Slow Down
l
The follower speed during catch up and slow down is limited relative to the master speed with +/- the value set with parameter 5.15.3.4
Superimposed Speed Difference.
Relative Sync At Start
With Relative Sync at Start the follower position is locked to the master position when the following 3 conditions are true:
Operation mode is Gear Control
l
The drive in enabled and started
l
Start Synchronizing is True
l
The offset between master and follower is thus locked when setting Start or Start Synchronizing, depending on the order in which they
are set as shown in the following diagram:
Master
Follower
Operation Mode (5.4.2.16)
Start Signal (200)
Start Synchronizing Input (5.15.2.1)
Synchronizing Output (5.15.1.3)
Figure 12: Relative Sync at Start
Relative Sync
© 2023.11
Offset
Gear control
Offset
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