Scaling Of Preset References And Bus References; Scaling Of Analog And Pulse References And Feedback - Danfoss VLT Midi Drive FC 280 Design Manual

Product Overview
P 3-00 Reference Range= [0] Min to Max
Resulting reference
P 3-03
P 3-02
Illustration 2.16 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 parameter 3-00 Reference Range is set to [0]
Min–Max, 0% reference equals 0 [unit] where unit
can be any unit, for example RPM, m/s, and bar.
100% reference equals the maximum (absolute
value of parameter 3-03 Maximum Reference,
absolute value of parameter 3-02 Minimum
Reference).
•
When parameter 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 parameter 3-00 Reference Range is set to [0]
Min–Max, 0% reference equals minimum
reference and 100% reference equals maximum
reference.
•
When parameter 3-00 Reference Range is set to [1]
-Max–+Max, -100% reference equals -maximum
reference, and 100% reference equals maximum
reference.
MG07B102
Design Guide
2.4.3 Scaling of Analog and Pulse
References and Feedback
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 2.17) are
clamped while feedbacks above or below are not.
Sum of all
references
High reference/
feedback value
Low reference/
feedback value
Illustration 2.17 Minimum and Maximum Endpoints
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Resource output
[Hz]
50
P2
P1
Resource input
0 1 8
Terminal X
high
2 2
[V]
10
23