Danfoss MCO 350 Operating Instructions Manual page 53

Syncronising Controller MCO 350 Operating
Instructions
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
speed of the application approx
f
N om
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.
For standard encoders the following table can be used:
Encoder
Resolu-
tion
250
256
500
512
1000
1024
2000
2048
2500
4096
5000
Parameter No. 32-00/32-02
Record the type of slave encoder. Factory default is incremental encoder.
kW min at
7.5 , 1460 1/
50
x N
Application
x
1.1 =
N
N om
Cmdvel = Old_Cmdvel + (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
Tau_filt (ms)
39500
38600
19500
19000
9500
9300
4500
4400
3500
1900
1400
®
MG.33.Q1.02 - VLT is a registered Danfoss trademark
62 H z maximum ref
H z
50 ,
min
. 1800 1/
1
H z x
1800
min
=
1
1460
min
4. Synchronisation
. value
53
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