How To Program Synchronization - Danfoss VLT 5000 Operating Instructions Manual

How to program synchronization

Change the value of parameter 701 to "2". This will start the synchronization program of VLT 5000.
To do the synchronization programming you use the following parameters:
Parameter 725
Parameter 732
Parameter 733
Parameter 734
Parameter 735
Parameter 737
Parameter 738
Parameter 739
Parameter 740
Parameter 741
Parameter 742
Parameter 743
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Synchronizing controller
Type of operation: Record "2" or "5" for marker synchronization.
Marker synchronization behaviour: Specify here how the slave drive is to react
while synchronizing to the master marker. "0" means the last marker pulse of
the master - the slave synchronizes to the last master marker pulse already
registered - it catches up. "1" means the next master marker pulse - the slave
waits for the next master marker and synchronizes to it - the slave slows down.
"2" means that the slave uses the nearest master marker - it decides for itself
whether to catch up or slow down.
Accuracy: Record a value (quadcounts) for a tolerance within which the slave
position may deviate from the position of the master.
Marker quantity Fault: Inaccuracy: Record the number of market signals to
generate a Fault signal.
Marker quantity Ready: Accuracy: Record the number of marker signals to
generate a Ready signal.
Gear ratio No.: Record the number of the gear ratio that is to be displayed in
Parameters 738 to 742. First set the number of the gear ratio, then in
Parameters 738 to 742 the necessary values for this gear ratio. The next gear
ratio is then selected in Parameter 737 and the same procedure is repeated.
Gear ratio numerator: Record the numerator value for the gear ratio. That is
the encoder pulses of the slave drive. To make fine adjustment possible by
means of inputs 32 and 33 a ratio of for example 7:16 must be programmed
as 7000:16000.
Gear ratio denominator: Record the denominator value of the gear ratio. This
value corresponds to the master pulses.
Slave markers: Record the number of slave markers for the marker ratio.
Ensure that the gear ratio and the marker ratio match each other.
Master markers: Record the number of master markers for the marker ratio.
Ensure that the gear ratio and the marker ratio match each other.
Fixed Offset: Record a fixed position offset for the selected gear ratio (quad
counts). This value specifies the position deviation between the slave marker
and the master marker. During operation the offset can be changed by means
of inputs 32 and 33.
Note: Offset is related to the master position. Offset related to the slave
position can be calculated as follows:
Step time: Record the delay in ms from one frequency change to another (hold
mode) and from one gear ratio numerator factor change to another
(synchronization mode) when there is a signal on terminal 32 or 33.
Offset *
Offset_slave =
Parameter
Parameter 738
739
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