Danfoss VLT AutomationDrive FC 301 Design Manual page 37

Basic Operating Principles
General Reference
parameters:
Reference Range: -Max - +Max
Minimum Reference: Don't care
Maximum Reference: 1000 RPM (100,0%)
Analog input 53
Low reference 0 RPM
High reference +500 RPM
Low voltage 1 V
Ext. Reference
High voltage 10 V
Absolute
-500 RPM -10 V
Ext. source 1
+500 RPM 10 V
Range:
-50,0% (-500 RPM)
+50,0% (+500 RPM)
Analog input 54
Low reference -500 RPM
High reference +500 RPM
Low voltage -10 V
Ext. Reference
High voltage +10 V
Absolute
-500 RPM -10 V
Ext. source 2
+500 RPM 10 V
Range:
-50,0% (-500 RPM)
+50,0% (+500 RPM)
Illustration 3.23 Negative to Positive Reference with Dead Band, Sign Determines the Direction, -Max to +Max
®
VLT AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
Dead band
-1 V to 1 V
Ext. reference
+
Range:
-100,0% (-1000 RPM)
+100,0% (+1000 RPM)
RPM
500
Limited to:
-200%- +200%
-1
-10
(-2000 RPM-
V
+2000 RPM)
10
1
-500
Limited to:
-100%- +100%
(-1000 RPM-
+1000 RPM)
RPM
500
Reference is scaled
according to max
reference
V
-10 10
Limits speed to min max
motor speed
-500
No Dead
Band
MG33BF02 - Rev. 2013-12-20
General Motor
parameters:
Motor speed direction: Both directions
Motor speed Low limit: 0 RPM
Motor speed high limit: 1500 RPM
Reference
algorithm
Reference
Range:
-100,0% (-1000 RPM)
+100,0% (+1000 RPM)
Scale to
RPM
Speed
Setpoint
Range:
-1000 RPM
+1000 RPM
Motor PID
Motor
Motor
control
3 3
35