Scaling Of Preset References And Bus References; Scaling Of Analog And Pulse References And Feedback - Danfoss VLT AutomationDrive FC 360 Design Manual

Product Overview
P 3-00 Reference Range= [0] Min to Max
2 2
Resulting reference
P 3-03
P 3-02
Illustration 2.19 Sum of All References When Minimum
Reference is Set to a Minus Value
2.4.2 Scaling of Preset References and Bus
References
Preset references are scaled according to the following
rules:
•
When 3-00 Reference Range is set to [0] Min–Max,
0% reference equals 0 [unit], where unit can be
any unit e.g. RPM, m/s, bar, etc. 100% reference
equals the maximum (abs (3-03 Maximum
Reference), abs (3-02 Minimum Reference).
•
When 3-00 Reference Range is set to [1] -Max–
+Max, 0% reference equals 0 [unit], and 100%
reference equals maximum reference.
Bus references are scaled according to the following
rules:
•
When 3-00 Reference Range is set to [0] Min–Max,
0% reference equals minimum reference and
100% reference equals maximum reference.
•
When 3-00 Reference Range is set to [1] -Max–
+Max, -100% reference equals -maximum
reference, and 100% reference equals maximum
reference.
24
Design Guide
2.4.3 Scaling of Analog and Pulse
References and feedback are scaled from analog and pulse
inputs in the same way. The only difference is that a
reference above or below the specified minimum and
maximum endpoints (P1 and P2 in Illustration 2.20) are
clamped whereas a feedback above or below is not.
Sum of all
references
High reference/
feedback value
Low reference/
feedback value
Illustration 2.20 Minimum and Maximum Endpoints
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References and Feedback
Resource output
[Hz]
50
P1
0 1
P2
Resource input
[V]
8 10
Terminal X
high
MG06B402