Danfoss MCO 350 Operating Instructions Manual page 78

4. Synchronisation
Parameter No. 19-07
Gear ratio denominator: Record the denominator value of the gear ratio. This value corresponds
to the master pulses.
Parameter No. 19-08
Slave markers: Record the number of slave markers for the marker ratio. Ensure that the gear
ratio and the marker ratio match each other.
Parameter No. 19-09
Master markers: Record the number of master markers for the marker ratio. Ensure that the gear
4
ratio and the marker ratio match each other.
Parameter No. 19-10
Fixed Offset: Record a fixed position offset for the selected gear ratio (quad counts). This value
specifies the position deviation between the slave marker and the master marker. During operation
the offset can be changed by means of inputs 32 and 33. Note: Offset is related to the master
position.
Offset related to the slave position can be calculated as follows:
O ffset
Parameter No. 19-11
Step time: Record the delay in ms from one frequency change to another (hold mode) and from
one gear ratio numerator factor change to another (synchronisation mode) when there is a signal
on terminal 32 or 33.
Parameter No. 19-12
Step width: In marker synchronisation mode, Offset Parameter 1908 is changed by this value
when Terminal 32 or Terminal 33 is activated.
Parameter No. 19-13
Slave speed factor: Record the factor by which the slave speed must be multiplied, so that the
desired value is displayed. To calculate the value use the following formula:
F actor
Example:
resolution 1024 increments, desired display
100 at 15001/min
F actor
Parameter No. 19-14
Master speed factor: Record the factor by which the master speed must be multiplied, so that the
desired value is displayed.
To calculate the value use the following formula:
F actor
Parameter No. 19-15
Synchronising error display factor: Record the factor by which the error must be multiplied, so
that the desired value is displayed.
To calculate the value, use the following formula:
78
O ffset x Par
. 19 − 06
slave
_ =
Par
. 19 − 07
N x x Slaveencoder
400
Set
=
x Display
60
1
x x
1500 400
min
=
x
60 100
N x x Slaveencoder
400
Set
=
60 x Display
MG.33.Q1.02 - VLT
Syncronising Controller MCO 350 Operating
resolution
_
value
_
I nkr
1024
U mdr
= 102400
resolution
_
_ value
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is a registered Danfoss trademark
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