Danfoss VLT AQUA Design Manual page 125

®
VLT AQUA Drive Design Guide
Enable Master/Follower
Set number of drives
Set the staging speed according to table 1
Configure Relay 1 to: Drive 2 enable
Configure Relay 2 to: Drive 3 enable
Configure Relay 10 to: Drive 4 enable
Settings for the follower drives only
Set terminal 29 to pulse input
Set terminal 29 high frequency to 5000 Hz
Operation
When the system is set to operation, the master drive will only be running with the needed number of pumps depending on the demand. If for some
reason the user prioritises the motors to be running at most times it is possible to prioritise 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 pumps available. It might be needed to fine adjust the
on/off
speed to optimise the energy consumption.
®
MG.20.N3.02 - VLT is a registered Danfoss trademark
6. Application Examples
par. 27-10
par. 27-11
par. 27-3*
par. 27-70
par. 27-70
par. 27-70
par. 5-13
par. 5-51
stage
125
6