Download Multifunction Programmable Controller Installation and User manual

Installation and User manual of the AC10 - AC20 - AC30 controller
16. 2 Loops B
16.1
Description
This configuration provides two loops:
1 with basic characteristics
1 with additional performing features
The loop 1 is the main one, it is the more powerful and it supports the following
additional functionalities:
Remote Setpoint from an analog input
Remote Setpoint from stored constants
Feed-Forward
Forcing of the output
3 alarms on PV1
Out of range detection (underflow) of PV1
Retransmission of both PV1 and WSP
The loop 2 is the basic one and provides the following basic functionalities:
Remote Setpoint from stored constants
Forcing of the output
3 alarms on PV2
Out of range detection (underflow) of PV2
The description of the control functionalities is reported, in the following pages,
related to the loop1 only. The functionality of the second loop is perfectly
identical but with the index numbers of the modules different. To the get the
proper index numbers for the second loop, refer to the Block Diagram.
16.2
Block Diagram
In the following block diagram the interconnections between the various
modules and the display panels are not indicated, in order to improve the
understanding of the functionality performed.
UNDERFLOW
UNDERFLOW
DI1
AI1
PV1
DI2
DI3
DI4
DI5
1
2
DI6
AI4
PV2
OR 4
PV2
DRSP
DRSP
ALM
ALM
3
2
1
VISU
FRL4
SET
1
RSP
DEV
MUX
SET
2
ALM
ALM
ALM
6
5
4
RSP
DEV
3
WSP
COST
1
COST
2
1
2
3
PID
Y%
F.F.
MUX
DB
OR 1
CONTROL
OUT
A/M
VISU 1
L1 / L2
4
5
2
DB
4
Y%
6
PID
7
1
OR 1
TRK
CONTROL
OUT
HOLD
A/M
DTRK
SCH
WSP
SCH
PV1
AO3
AO2
VISU 3
L1
172
DO2
DO1
AO1
TRK
DTRK
HOLD
VISU 2
L2
YMIN
DO4 DO3
DB
8
0
YMAX
VISU 2
L1
DI7
WSP
WSP - PV
1
2
PV1
ALM
DI8
OR 1 DB1 DB2
DSEL
WSP
WSP - PV
AI3
AI2
VISU 3
L2
DO8
DO7
DO6
DO5
AO4