76
SPX advanced – description of parameters
SPX ADVANCED APPLICATION MANUAL
SVCH0203—October 2017 www.eaton.com
Code
ID
Parameter
Notes
P1.4.5.1
141
AI3 signal selection “AI3 signal sel”
P1.4.6.1
152
AI4 signal selection “AI4 signal sel”
Connect the AI3/AI4 signal to the analog input of your choice with this parameter. For
more information, see Chapter 2 “Terminal To Function” (TTF) programming principle.
When the parameter for Analog input signal selection is set to 0.1 you can control the
analog input monitoring variable from Fieldbus by assigning the Process Data Input ID
number to the analog input monitoring signal thus allowing the PLC input signals to be
scaled with analog input scaling functions.
P1.4.5.2
142
Analog input 3 signal filtering time “AI3 Filter Time”
P1.4.6.2
153
Analog input 4 signal filtering time “AI3 Filter Time”
First order filtering is used for analog inputs signals 3 and 4.
0
2000
4000
6000
8000
10000
12000
-0
.04
5
0.
54
5
1.
13
5
1.
72
5
2.
31
5
2.
90
5
3.
49
5
4.
08
5
4.
67
5
5.
26
5
5.
85
5
6.
44
5
Unfiltered
1 s filter time
63 %
P1.4.5.3
144
AI3 custom setting minimum “AI3 custom min”
P1.4.5.4
145
AI3 custom setting maximum “AI3 custom max”
P1.4.6.3
155
AI4 custom setting minimum “AI4 custom min”
5.4.4 Analog input 3 & 4
Analog Inputs 3 and 4 can be written form fieldbus. This allows
signal scaling and inversion. Useful e.g. in case when PLC is
not operational (value zero received) signal will be automatically
at maximum. See Figure below.
P
V
V
V
P
P
IN
TC
P
P
P
Write to Par ID
SCALING
FILTER
G
IN 0
IN 1
IN 1
IN 2
IN OUT
SEL
LT
AN.IN
A
Al3
Al4
Al3-4 Control. ID
Al3-4 Scale Min
Al3-4 Custom Min
P
Al3-4 Custom Max
Analogue Input 3/4
Analogue Input 3/4
Analogue Input 3/4
Al3-4 Scale Max
Al3/4 Filter Time
ID To Write
IN
A
AI3-4 Signal Sel
OUT
Out_Max
In_Max
IN
In_Min
Out_Min
Invert
SCALING
OUT
Out_Max
In_Max
IN
In_Min
Out_Min
Invert
100 %
0
0.9
