Download Multifunction Programmable Controller Installation and User manual

Installation and User manual of the AC10 - AC20 - AC30 controller
16.10
Applications
This two loops configuration is particularly suitable for controlling processes with
predictive variables, being the main loop equipped with the feed-forward.
For instance, in a boiler control system, this configuration is dedicated both to
the control of the 2 elements boiler barrel and to the more simple control of the
air pressure or to another basic loop.
In a preheating furnace, for instance, this configuration is dedicated both to the
control of the pressure of the furnace, using the global fuel flow as the predictive
feed forward magnitude, and to the more basic control of the fuel air pressure.
16.11
Electrical Connections
The following picture provides a clear view of all the termination blocks, with the
associated functionality, and it is specific of this configuration. No signals must
be connected to the termination blocks not used by the strategy.
The termination blocks 25 and 26 are providing a 24V DC output, particularly
suitable to supply of the 2 wires transmitters.
PV1 measure
LOOP 1
Remote SP
Feed Forw.
LOOP 2
PV2 measure
1
25 +24
2
26 +24
3
4
5
6
A
N
A
L
O
G
7
8
I
N
P
10 U
T
11
Loc/Rem
Rem/Mem
LOOP 1
Hold
Track
Y min/Max
Loc/Rem
LOOP 2
Hold
Track
176
LAN
A 27
N
A 28
L
O 29
G
30
O
U 31
T
32
9
33
12
34
D
I 35
G
I 36
T
A 37
L
38
13
14
15 D
16 I
G
17 I
T
18 A
L
19
20
I
N
21 P
U
22
T
23
24
39
CN2
485
O 40
U
T 41
42
43
44
Actuator 1
Retr. PV1
Actuator 2
LOOP 2
Al. 1 Pv1
Al. 2 Pv1
LOOP 1
Al. 3 Pv1
Und.F. Pv1
Al. 4 Pv2
Al. 5 Pv2
LOOP 2
Al. 6 Pv2
Und.F.Pv2
46
Power Supply
48
LOOP 1
Retr. WSP