A1.5.3 backward control, A1.5.3, A1-7 – Yokogawa EJX930A User Manual
Page 84
<Appendix 1. Signal Characterizer (SC) Block>
A1-7
IM 01C25T02-01E
A1.5.3 Backward Control
SC: The controlled variable output from PID is
converted into an information quantity that can be
interpreted by AO, and backward information from
AO is converted into an information quantity that
can be interpreted by PID before being transmitted
to the PID.
AI
OUT
AO
CAS_IN
SC
OUT_2
OUT_1
IN_1
IN_2
PID
BKCAL_IN
OUT
IN
BKCAL_OUT
SWAP_2=ON
FA0110.ai
Figure A1.10 Backward Control (SWAP_2 = On)
To enable backward control (which inverts the X
and Y axes), the line-segment function must be
set so that the elements of the curve increase in a
monotone manner.(As shown in Figure A1.11) If
they do not increase in a monotone manner, the
mode changes to O/S, disabling calculation.
No.
CURVE_X
CURVE_Y
1
5
5
2
10
10
3
15
11
4
20
20
5
25
25
6
30
26
7
35
30
8
40
40
9
45
45
10
50
50
11
51
51
12
52
54
13
53
59
14
54
66
15
55
75
16
65
80
17
75
81
18
80
85
19
85
86
20
90
90
21
95
95
100
90
80
70
60
50
40
30
20
10
0
10 20
30 40
50
60 70
80
90 100
FA0111.ai
Line-segment function
C
U
R
VE
_Y
CURVE_X
X_RANGE = 100, 0, %, 0x00
Y_RANGE = 100, 0, %, 0x00
Figure A1.11 Setting Example of a Line-segment
Function