Danfoss VLT AutomationDrive FC 300 Design Manual page 30

Introduction
Illustration 3.17 shows how reference input with limits
inside Min – Max limits clamps.
3 3
Ext. Reference
Absolute
0 RPM 1V
500 RPM 10V
Digital input
Illustration 3.17 Positive Reference with Dead Band, Digital input to Trigger Reverse
Illustration 3.18 shows how Reference input with limits
outside -Max to +Max limits clamps to the inputs low and
high limits before addition to actual reference. And how
28
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-21462-Danfoss-131B8966-VLT-Automation-VT-Drive-VFD-FC301-230V-5-HP.aspx
®
VLT AutomationDrive FC 300 Design Guide, 0.25-75 kW
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 1V
High voltage 10V
Ext. source 1
Range:
0,0% (0 RPM) Reference is scaled
according to min
100,0% (500 RPM)
max reference giving a
speed.!!!
RPM
500
V
10
1
Digital input 19
Low No reversing
High Reversing
Limits Speed Setpoint
according to min max speed.!!!
MG33BE02 - VLT
General Motor
parameters:
Limited to: -200%- +200%
Motor speed direction:Both directions
(-1000 RPM- +1000 RPM)
Motor speed Low limit: 0 RPM
Motor speed high limit: 200 RPM
Ext. reference
Reference
Range:
algorithm
0,0% (0 RPM)
100,0% (500 RPM)
Reference
Range:
0,0% (0 RPM)
100,0% (500 RPM)
Scale to
speed
Speed
setpoint
Range:
-500 RPM
+500 RPM
Motor PID
Motor
control
the actual reference is clamped to -Max to +Max by the
Reference algorithm.
®
is a registered Danfoss trademark
Limited to:
0%- +100%
(0 RPM- +500 RPM)
Dead band
RPM
500
V
10
1
-500
Range:
Motor
-200 RPM
+200 RPM