Table 11-1. Cs20 Control Signals - ABB ControlIT 53MC5000 Instruction Manual

11.2 CS20 CONTROL SIGNALS
Loading CS20 connects the 53MC5000 Controller function blocks for operation as two standard
PID controllers. As shown in Figure 11-1, up to ten control signals are available; however, only
two are essential for each loop controller: they are the Process Variable and the Control Output. If
the other six control signal functions are not needed, then their respective datapoints should be left
at the default values. Table 11-1 below describes the ten signals in CS20.

Table 11-1. CS20 Control Signals

Control
Signal
AI0 - Process This analog input signal represents the value of
Variable Loop 1 the Loop 1 process to be manipulated by the
controller. It is compared to the Loop 1 control
setpoint to determine the Control Output Loop 1
value.
AI1 - Process This analog input signal represents the value of
Variable Loop 2 the Loop 2 process to be manipulated by the
controller. It is compared to the Loop 2 control
setpoint to determine the Control Output Loop 2
value.
AI2 - Remote This analog input signal represents the value to
Setpoint Loop 1 be used as the Loop 1 control setpoint when
remote setpoint operation is selected with the
faceplate push buttons and enabled by DI0.
AI3 - Remote This analog input signal represents the value to
Setpoint Loop 2 be used as the Loop 2 control setpoint when
remote setpoint operation is selected with the
faceplate push buttons and enabled by DI1.
AO0 - Control This is the 4-20 mA output signal that drives
Output Loop 1 the Loop 1 final control element.
AO1 - Control This is the 4-20 mA output signal that drives
Output Loop 2 the Loop 2 final control element.
DI0 - Remote When a closed contact is present on this input,
Enable Loop 1 the operator can select the setpoint value to be
set by the value of the Loop 1 Remote Setpoint
input with the R/L push button.
DI1 - Remote When a closed contact is present on this input,
Enable Loop 2 the operator can select the setpoint value to be
set by the value of the Loop 2 Remote Setpoint
input with the R/L push button.
DO0 - Process This contact is closed when the Loop 1 Process
Alarms Loop 1 Variable value is not within the C103 and C104
datapoint values (Loop 1 Alarm Limits 1 and 2);
otherwise, the contact is open.
11-2
53MC5000 Process Control Station
Definition
Cord Rear
Set Term
ITB Board
TB1-1 (+) 1 (+)
TB1-2 (-) 2 (-)
TB1-3 3
TB1-5 (+) 4 (+)
TB1-6 (-) 5 (-)
TB1-7 6
TB1-9 1
TB1-10 (+) 7 (+)
TB1-11 (-) 8 (-)
TB1-13 4
TB1-14 (+) 9 (+)
TB1-15 (-) 8 (-)
TB1-17 (+) 10 (+)
TB1-18 (-) 11 (-)
TB1-19 (+) 12 (+)
TB1-20 (-) 11 (-)
TB2-1 (+) 13 (+)
TB2-2 (-) 14 (-)
TB2-3 (+) 15 (+)
TB2-4 (-) 14 (-)
TB2-5 (+) 16 (+)
TB2-6 (-) 17 (-)
1 of 2
Signal
+24 V
AI0
SC
+24 V
AI1
SC
+24 V
AI2
SC
+24 V
AI3
SC
AO0
PC
AN01
PC
DI0
PC
DI1
PC
DO0
PC