Danfoss VLT AutomationDrive FC 301 Design Manual page 35

Basic Operating Principles
Illustration 3.21 shows how reference input with limits inside Min – Max limits clamps.
General Reference
parameters:
Reference Range: Min - Max
Minimum Reference: 0 RPM (0,0%)
Maximum Reference: 500 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
0 RPM 1 V
Ext. source 1
500 RPM 10 V
Range:
0,0% (0 RPM)
100,0% (500 RPM)
RPM
500
Digital input 19
Digital input Low No reversing
High Reversing
Illustration 3.21 Positive Reference with Dead Band, Digital input to Trigger Reverse
®
VLT AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
Limited to: -200%- +200%
(-1000 RPM- +1000 RPM)
Ext. reference
+
Range:
0,0% (0 RPM)
100,0% (500 RPM)
Reference is scaled
according to min max
reference giving a speed
V
10
1
Limits Speed Setpoint
according to min max speed
MG33BF02 - Rev. 2013-12-20
General Motor
parameters:
Motor speed direction: Both directions
Motor speed Low limit: 0 RPM
Motor speed high limit: 200 RPM
Reference
Limited to:
algorithm
0%- +100%
(0 RPM- +500 RPM)
Reference
Range:
0,0% (0 RPM)
100,0% (500 RPM)
Dead band
RPM
Scale to
500
speed
1
Speed
setpoint
Range:
-500
-500 RPM
+500 RPM
Motor PID
Range:
Motor
-200 RPM
control
+200 RPM
V
10
Motor
33
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