Danfoss VLT AutomationDrive FC 301 Design Guide

Illustration 3.22 shows how reference input with limits outside -Max to +Max limits clamps to the inputs low and high limits
before being added to actual reference. Illustration 3.22 also shows how the actual reference is clamped to -Max to +Max by
the reference algorithm.
+
750
1
10
500
1
10
130BA188.13
-500
V
V
Analog input 53
Low reference 0 RPM
High reference 500 RPM
Low voltage 1 V
High voltage 10 V
Ext. source 1
Range:
0,0% (0 RPM)
150,0% (750 RPM)
150,0% (750 RPM)
Ext. reference Range:
0,0% (0 RPM)
750 RPM 10 V
Ext. Reference
Absolute
0 RPM 1 V
Reference
algorithm
Reference
100,0% (500 RPM)
0,0% (0 RPM)
Range:
Limited to:
-100%- +100%
(-500 RPM- +500 RPM)
Limited to: -200%- +200%
(-1000 RPM- +1000 RPM)
Reference is scaled
according to max
reference giving a speed
Scale to
speed
+500 RPM
-500 RPM
Range:
Speed
setpoint
Motor
control
Range:
-200 RPM
+200 RPM
Motor
Digital input 19
Low No reversing
High Reversing
Limits Speed Setpoint
according to min max speed
Motor PID
Dead band
Digital input
General Reference
parameters:
Reference Range: -Max - Max
Minimum Reference: Don't care
Maximum Reference: 500 RPM (100,0%)
General Motor
parameters:
Motor speed direction: Both directions
Motor speed Low limit: 0 RPM
Motor speed high limit: 200 RPM
Illustration 3.22 Positive Reference with Dead Band, Digital Input to Trigger Reverse. Clamping Rules
Basic Operating Principles
VLT
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
34 MG33BF02 - Rev. 2013-12-20
33

Danfoss VLT AutomationDrive FC 301 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 301
Category	DC Drives
Language	English