Danfoss VLT 5000 User Manual

Synchronizing controller
MG.10.N4.02 - VLT is a registered Danfoss trademark 53
Setting the parameters
For this we recommend you to have the description of parameters at hand. See the VLT
5000/VLT5000Flux Operating Instructions.
NOTE: It is very important that the VLT is optimized for the motor before optimizing the Synchronizing
controller. First you record the motor data and perform an AMA (Automatic Motor Adaptation) if
possible and then you can start programming your synchronization functions
Parameter 205 Maximum reference: Set the frequency for a value that is about 10% higher
than the maximum value of parameter 716.
Example:
Motor 7.5kW, 1460
1
/
min
at 50Hz, speed of the application approx. 1800
1
/
min
1,1*
*
Nom
nApplicatioNom
N
Nf
=
50 1800
1460
11
1
1
Hz *
*,
min
min
= 62Hz Maximum ref. value
Parameter 221 Torque limit for motor mode: Set for maximum. – Choose a lower value, if
special safety precautions are necessary.
Parameter 222 Torque limit for regenerative operation: Set for maximum. – Choose a lower
value, if special safety precautions are necessary.
Parameter 223 Set the minimum current that is to activate the brake. Choose a value that is
below the motor magnetisation current.
Parameter 701 Record “1” to start the test program.
Parameter 709 When performing position synchronization this parameter is used to insert a
filter to compensate for an oscillating master signal. If, for example, the master
is experiencing shock loads the pid loop of the synchronizing controller will
have a tendency to oscillate as well. A negative value must be entered.
Example:
If a filter factor of –100000 (100 ms) is used the correction is balanced within:
1000/(filter factor *10)= 1 second.
Parameter 711 Record the slave encoder type. “0” represents the incremental encoder.
Parameter 712 Record the resolution of the slave encoder.
Parameter 713 Record the master encoder type. “0” represents the incremental encoder.
Parameter 714 Record the resolution of the master encoder.
Parameter 715 Record “1” for clockwise rotation of both master and slave. Record “-1” if the
slave is to run in the opposite direction.
Parameter 716 Record maximum RPM measured at the slave encoder.
Parameter 717 Minimum ramp: Set the time in ms for the slave drive to accelerate from
standstill to maximum speed (par 716). The value is important, as this setting
highly affects the control accuracy!

Danfoss VLT 5000 Specifications

General

Brand	Danfoss
Model	VLT 5000
Category	Controller
Language	English