Vacon apfiff09 marine, Руководство по применению, Страница: 149 / 310

148
• VACON®
apfiff09 marine
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
7.4.4 Analogue input 3 & 4
Analogue Inputs 3 and 4 can be written form fieldbus. Use of analogue scaling for fieldbus signals
can be useful, for example, when the PLC is not operational and the drive receives a zero, for
example, to the power limit. With analogue input scaling it is possible to use inverted signal and have
100% power limit for emergency run, while the power limit value from PLC is zero.
P AI3-4 Signal Sel
IN
OUT
AN.IN
FILTER
IN
TC P AI3/4 Filter Time
P AI3-4 Custom Max
P AI3-4 Custom Min
SEL
G
IN 0
IN 1
0.9
V Analogue Input 3/4
A AI4
A AI3
SCALING
OUT
Out_Max
In_Min
Out_Min
In_Max
IN
Invert
0
100 %
SCALING
OUT
Out_Max
In_Min
Out_Min
In_Max
IN
Invert
LT
IN 1
IN 2
V Analogue Input 3/4
V Analogue Input 3/4
P AI3-4 Scale Max
P AI3-4 Scale Min
Write to Par ID
ID To Write
IN
P AI3-4 Control. ID
P2.4.5.1 AI3 signal selection ID141
“AI3 Signal Sel”
P2.4.6.1 AI4 signal selection ID152
“AI4 Signal Sel”
Connect the AI3/AI4 signal to the analogue input of your choice with this parameter. For
more information, see Chapter 4
“Terminal To Function” (TTF) programming principle
.
When the parameter for Analogue input signal selection is set to 0.1, you can control the
analogue input monitoring variable from Fieldbus by assigning the Process Data Input ID
number to the analogue input monitoring signal thus allowing the PLC input signals to be
scaled with analogue input scaling functions.
P2.4.5.2 Analogue input 3 signal filtering time ID142
“AI3 Filter Time”
P2.4.6.2 Analogue input 4 signal filtering time ID153
“AI3 Filter Time”
First order filtering is used for analogue inputs signals 3 and 4.
0
2000
4000
6000
8000
10000
12000
-0.045
0.5
45
1.1
35
1.7
25
2.3
15
2.9
05
3.4
95
4.0
85
4.6
75
5.2
65
5.8
55
6.4
45
Unfiltered
1 s filter time
63 %