Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Instruction Manual - Manual (Page 253)

13.2 CS22 CONTROL SIGNALS
Loading CS22 connects the 53MC5000 Controller function blocks for operation as two standard
PID controllers. As shown in Figure 13-1, CS22 provides ten control signals which are described
in Table 13-1.
Table 13-1. CS22 Control Signals
Control
Signal Definition
Cord
Set
ITB
Rear
Term
Board
Signal
AI0 - Primary
Variable Loop This analog input signal represents the value of
the primary loop process to be manipulated by
the controller. It is compared to the primary
setpoint to determine the Primary Variable Loop
value that is compared to the Limiting Variable
Loop value for control of the final element. TB1-1 (+)
TB1-2 (-)
TB1-3 1 (+)
2 (-)
3 +24 V
AI0
SC
AI1 - Remote
Setpoint
Primary This analog input signal represents the value to
be used as the primary setpoint when remote
setpoint operation is selected with the faceplate
push buttons and enabled by DI0. TB1-5 (+)
TB1-6 (-)
TB1-7 4 (+)
5 (-)
6 +24 V
AI1
SC
AI2 - Limiting
Variable Loop This analog input signal represents the value of
the limiting loop process to be manipulated by
the controller. It is compared to the limiting
setpoint to determine the Limiting Variable Loop
value that is compared to the Primary Variable
Loop value for control of the final element. TB1-9
TB1-10 (+)
TB1-11 (-) 1
7 (+)
8 (-) +24 V
AI2
SC
AI3 - Remote
Setpoint
Limiting This analog input signal represents the value to
be used as the limiting setpoint when remote
setpoint operation is selected with the faceplate
push buttons and enabled by DI1. TB1-13
TB1-14 (+)
TB1-15 (-) 4
9 (+)
8 (-) +24 V
AI3
SC
AO0 - Control
Output Limiting This is the 4-20 mA output signal that drives the
final control element. TB1-17 (+)
TB1-18 (-) 10 (+)
11 (-) AO0
PC
AO1 - Override
Status This signal indicates which one of the two loops
is driving the final control element. When
control is from the primary loop, output is 4 mA;
when control is from the limiting loop, output is
20 mA. TB1-19 (+)
TB1-20 (-) 12 (+)
11 (-) AN01
PC
DI0 - Remote
Enable Primary When a closed contact is present on this input,
the operator can select the setpoint value to be
set by the value of the Remote Setpoint Primary
input with the R/L push button. TB2-1 (+)
TB2-2 (-) 13 (+)
14 (-) DI0
PC
DI1 - Remote
Enable Limiting When a closed contact is present on this input,
the operator can select the setpoint value to be
set by the value of the Remote Setpoint Limiting
input with the R/L push button. TB2-3 (+)
TB2-4 (-) 15 (+)
14 (-) DI1
PC
DO0 - Process
Alarms Primary This contact is closed when the Primary
Variable value is not within the C103 and C104
datapoint values (Loop 1 Alarm Limits 1 and 2);
otherwise, the contact is open. TB2-5 (+)
TB2-6 (-) 16 (+)
17 (-) DO0
PC
1 of 2
53MC5000 Process Control Station
13-2