Danfoss VLT 5000 - Figure 30: Addition of the Cycle Times; Figure 31: Synchronization with Virtual Master

Synchronizing controller
82 MG.10.N4.02 - VLT is a registered Danfoss trademark
As can be seen from the diagram below, at Start, as well as with every change in
speed of the master drive, the cycle times are added; they are then compensated
for again based on the control characteristics of the controller in question.
Figure 30: Addition of the cycle times
In this case, the same application is realised by means incorporating a virtual
master. Although the way that the reference value is introduced at the first
belt is analogous, the value is used to set the virtual master signals.
Figure 31: Synchronization with virtual master