Danfoss VLT AQUA Drive Design Manual page 146

6. Application Examples
Settings for the Follower drives only
Set Reference 1 Source
Set Terminal 29 Digital Input
Set Term. 29 Low Frequency
Set Term. 29 high frequency
Operation
When the system is set to operation, the master drive will automatically run "time balance" with all drives running with the needed number of pumps
depending on the demand. If, for some reason the user wants to prioritize which motors should be preferred, it is possible to prioritize the pumps in par.
27-16 in three levels. (Priority 1, Priority 2 and spare pump). Pumps with priority 2 will only be staged on when there is no priority 1 pump available.
It might be necessary to fine adjust the
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stage on/off speed to optimise the energy consumption.
MG.20.N4.02 - VLT
3-15
5-13
5-50
5-51
®
is a registered Danfoss trademark
®
VLT AQUA Drive Design Guide
Pulse input 29 [7]
Pulse input [32]
0 [Hz]
5000 [Hz]