Danfoss VLT AutomationDrive FC 360 Design Manual page 30

Product Overview
Case 2: Positive reference with dead band, digital input to trigger reverse, part II
Illustration 2.23 shows how reference input with limits outside -maximum to +maximum limits clamps to the input low and
high limits before adding to external reference, and how the external reference is clamped to -maximum to +maximum by
2 2
the reference algorithm.
Ext. Reference
Absolute
0 Hz 1 V
30 Hz 10 V
Digital input
Illustration 2.23 Clamping of Reference Input with Limits outside -Maximum to +Maximum
28
Design Guide
General Reference
parameters:
Reference Range: -Max - Max
Minimum Reference: Don't care
Maximum Reference: 20 Hz (100.0%)
Analog input 53
Low reference 0 Hz +
High reference 20 Hz
Low voltage 1 V
High voltage 10 V
Ext. source 1
Range:
0.0% (0 Hz)
150.0% (30 Hz)
30 Hz
V
10
1
Digital input 19
Low No reversing
High Reversing
Limits Speed Setpoint
according to min max speed.!!!
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General Motor
parameters:
Limited to: -200%- +200%
Motor speed direction: Both directions
(-40 Hz- +40 Hz)
Motor speed Low limit: 0 Hz
Motor speed high limit: 10 Hz
Ext. reference Reference
algorithm
Range:
0.0% (0 Hz)
150.0% (30 Hz)
Reference
Range:
Reference is scaled
0.0% (0 Hz)
according to
100.0% (20 Hz)
max reference giving a
speed.!!!
Scale to
speed
Speed
setpoint
Range:
-20 Hz
+20 Hz
Motor PID
Motor
control
Limited to:
-100%- +100%
(-20 Hz- +20 Hz)
Dead band
20 Hz
V
10
1
-20 Hz
Range:
Motor
-8 Hz
+8 Hz
MG06B402