The endpoints P1 and P2 are defined by the following parameters, depending on which analog or pulse input is used
Analog 53
S201=OFF
Analog 53
S201=ON
Analog 54
S202=OFF
Analog 54
S202=ON
Pulse input 29 Pulse input 33
P1=(Minimum input value, Minimum reference value)
Minimum reference value
6-14 Terminal
53 Low Ref./
Feedb. Value
6-14 Terminal 53
Low Ref./Feedb.
Value
6-24 Terminal
54 Low Ref./
Feedb. Value
6-24 Terminal 54
Low Ref./Feedb.
Value
5-52 Term. 29
Low Ref./Feedb.
Value
5-57 Term. 33 Low
Ref./Feedb. Value
Minimum input value
6-10 Terminal
53 Low
Voltage [V]
6-12 Terminal 53
Low Current
[mA]
6-20 Terminal
54 Low
Voltage [V]
6-22 Terminal 54
Low Current
[mA]
5-50 Term. 29
Low Frequency
[Hz]
5-55 Term. 33 Low
Frequency [Hz]
P2 =(Maximum input value, Maximum reference value)
Maximum reference value
6-15 Terminal
53 High Ref./
Feedb. Value
6-15 Terminal 53
High Ref./Feedb.
Value
6-25 Terminal
54 High Ref./
Feedb. Value
6-25 Terminal 54
High Ref./Feedb.
Value
5-53 Term. 29
High Ref./
Feedb. Value
5-58 Term. 33 High
Ref./Feedb. Value
Maximum input value
6-11 Terminal
53 High
Voltage [V]
6-13 Terminal 53
High Current
[mA]
6-21 Terminal
54 High
Voltage [V]
6-23 Terminal 54
High Current
[mA]
5-51 Term. 29
High Frequency
[Hz]
5-56 Term. 33 High
Frequency [Hz]
Table 3.5 P1 and P2 Parameters
3.3.4 Dead Band around Zero
In some cases, the reference and, in rare instances, the feedback needs a dead band around zero. This is used to ensure the
machine is stopped when the reference is “near zero”.
To make the dead band active and to set the amount of dead band, apply the following settings:
•
Minimum reference value (see
for relevant parameter) or maximum reference value must be zero. In
other words, Either P1 or P2 must be on the X-axis in
•
Both points defining the scaling graph must be in the same quadrant.
The size of the dead band is defined by either P1 or P2 as shown in
.
(RPM)
Resource output
Resource
input
Quadrant 2
Quadrant 3
Quadrant 1
Quadrant 4
Terminal X
low
Terminal X
high
Low reference/feedback
value
High reference/feedback
value
-1
1
130BA179.10
-1500
-6
6
(V)
1500
-10
10
P1
P2
0
Figure 3.16 Dead Band
(RPM)
Resource output
Resource
input
Quadrant 2
Quadrant 3
Quadrant 1
Quadrant 4
Terminal X
low
Terminal X
high
Low reference/feedback
value
High reference/feedback
value
-1
1
130BA180.10
-1500
-6
6
(V)
1500
-10
10
P1
P2 0
Figure 3.17 Reverse Dead Band
Thus a reference endpoint of P1=(0 V,
0 RPM) does not result in any dead band, but a reference endpoint of P1=(1 V, 0 RPM), results in a -1 V to +1 V dead band
provided that the end point P2 is placed in either Quadrant 1 or Quadrant 4.
Product Introduction
Design Guide
MG34S222
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
33
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Содержание VLT AutomationDrive FC 300
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