Parameter No. 303
Maximum reference: Set the frequency for a value that is about 10% higher than the maximum
value of par. 32-80.
Example:
Motor 7.5 kW, 1460 1/min at 50 Hz,
speed of the application approx. 1800 1/min
f
Nom
x N
Application
N
Nom
x
1.1 =
50
Hz x
1800
1
min
1460
1
min
=
62
Hz maximum ref
.
value
Parameter No. 416
Torque limit for motor mode: Set for maximum. – Choose a lower value, if special safety precau-
tions are necessary.
Parameter No. 417
Torque limit for regenerative operation: Set for maximum. – Choose a lower value, if special safety
precautions are necessary.
Parameter No. 33-80
Record “1” to start the test program.
Parameter No. 33-26
This parameter configures the velocity filter for speed synchronisation. Since speed synchronisa-
tion is based on speed a small fluctuation in master speed, when running at low speed, can have
an effect on the pid loop control. Hence this filter will even out the effect.
Cmdvel = Old_ (Actvel – Old_Cmdvel) * ms/tau_filt
Cmdvel = set velocity
Old_Cmdvel = last set velocity
Actvel = actual velocity of master
ms = sample time (parameter 32-69)
tau_filt = filter time constant
For standard encoders the following table can be used:
Encoder
Resolu-
tion
Tau_filt (ms)
250
39500
256
38600
500
19500
512
19000
1000
9500
1024
9300
2000
4500
2048
4400
2500
3500
4096
1900
5000
1400
Parameter No. 32-00/32-02
Record the type of slave encoder. Factory default is incremental encoder.
Syncronising Controller MCO 350 Operating
Instructions
4. Synchronisation
MG.33.Q1.02 - VLT
®
is a registered Danfoss trademark
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4