United Security Products AVD-45c Manual Página 188

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174 UDC 6300 Process Controller Product Manual 1/03
5.11 2 Loops of Control Overview, Continued
Loop 2
Figure 5-3 is a Block Diagram of a Loop 2 of a 2 Loop controller.
Figure 5-3 Functional Overview Block Diagram of Loop 2 of a 2 Loop Controller
21741
IN 1
Ratio
Bias
••
IN 2
Ratio
Bias
••
IN 3
Ratio
Bias
••
IN 4
Ratio
Bias
••
IN 5
Ratio
Bias
••
12345
PV
Source
IN 2
In Alg 2IN 3 In Alg1IN 4 IN 5
RSP
Source
1
2
3
4
5
INPUT A
INPUT B
INPUT C
INPUT
ALGORITHM 1/2
FEEDFORWARD
INPUT A ONLY
To RSP
SP
Source
SP
PV
Remote SP
Local SP
SP 1
SP 2
SP 3
To RSP
••••
To RSP To RSP To RSP To RSP
PID
CONTROL
ALGORITHM
Loop 2
FEEDFORWARD
SUMMER OR
MULTIPLIER
OUTPUT
Output
without
Feedforward or
Manual Mode
To Final
Control
Element
Other
Alg
None
1
2
3
4
5
Other
Alg
Output 1
Output 2
1
2
3
4
5
Other
Alg
Output 1
Output 2
OUT 2
Continued on next page
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