
The value of
3-02 Minimum Reference
cannot be set to less
than 0, unless
1-00 Configuration Mode
is set to
[3] Process
.
In that case, the following relations between the resulting
reference (after clamping) and the sum of all references is
as shown in
.
Figure 3.13 Sum of All References
3.3.2 Scaling of Preset References and Bus
References
Preset references
Preset References are scaled according to the following
rules:
•
When
3-00 Reference Range
:
[0] Min to Max
0%
reference equals 0 [unit], where unit can be any
unit such as RPM, m/s, bar, etc. 100% reference
equals the Max abs (
3-03 Maximum Reference
),
abs (
3-02 Minimum Reference
).
•
When
3-00 Reference Range
:
[1] -Max to +Max
0%
reference equals 0 [unit] -100% reference equals -
Max Reference 100% reference equals Max
Reference.
Bus references
Bus references are scaled according to the following rules:
•
When
3-00 Reference Range
:
[0] Min to Max.
To
obtain max resolution on the bus reference, the
scaling on the bus is: 0% reference equals Min
Reference and 100% reference equals Max
reference.
•
When
3-00 Reference Range
:
[1] -Max to +Max
-100% reference equals -Max Reference 100%
reference equals Max Reference.
3.3.3 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
) are
clamped, whereas a feedback above or below is not.
(RPM)
Resource output
Resource
input
Terminal X low
Terminal X
high
Low reference/feedback value
High reference/feedback
value
130BA181.10
-1500
-6
8
(V)
1500
-10
10
P1
P2
0
-600
Figure 3.14 Scaling of Analog and Pulse References
(RPM)
Resource output
Resource
input
Terminal X low
Terminal X
high
Low reference/feedback value
High reference/feedback
value
130BA182.10
-1500
-6
8
(V)
1500
-10
10
P1
P2
0
-600
Figure 3.15 Scaling of Analog and Pulse Feedback
Product Introduction
Design Guide
32
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
MG34S222
3
3
Summary of Contents for VLT AutomationDrive FC 300
Page 2: ......