Operating instructions

The reference (MRV) and feedback (MAV) are always scaled equally.
Depending on the setting of par. 3-00
Reference Range the reference and MAV are scaled ac-
cordingly:
NB!
If par. 3-00 is set to [0]
Min - Max , a negative reference will be handled as 0%.
The actual output of the frequency converter is limited by the speed limit parameters Motor Low/
High Speed Limit [RPM/Hz]
in par. 4-11 to 4-14.
The final speed limit is set by par. 4-19
Max Output Frequency.
The reference and the MAV have the format
which appears from the table
MRV / MAV
Integer in
hex
Integer in
decimal
100% 4000 16.384
75% 3000 12.288
50% 2000 8.192
25% 1000 4.096
0% 0 0
-25% F000 -4.096
-50% E000 -8.192
-75% D000 -12.288
-100% C000 -16.384
NB!
Negative numbers are formed as two's complement.
4. How to Control the Frequency Converter VLT
®
Profibus
28 MG.33.C4.02 - VLT
®
is a registered Danfoss trademark
4