Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Instruction Manual - Manual (Page 241)

12.2 CS21 CONTROL SIGNALS
Loading CS21 connects the 53MC5000 Controller function blocks for operation as a Two Loop Cas-
cade Controller. As shown in Figure 12-1, CS21 provides ten control signals which are described
in Table 12-1.
Table 12-1. CS21 Control Signals
Control
Signal Definition
Cord
Set
ITB
Rear
Term
Board
Signal
AI0 - Process
Variable
(Primary) This analog input signal represents the value of
the primary process loop to be manipulated by
the controller. It is compared to the primary
control setpoint to determine the setpoint value
for the secondary process loop. 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 loop control 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 - Process
Variable
(Secondary) This analog input signal represents the value of
the secondary process loop to be manipulated
by the controller. It is compared to the
secondary control setpoint to determine the
Control Output (Secondary). TB1-9
TB1-10 (+)
TB1-11 (-) 1
7 (+)
8 (-) +24 V
AI2
SC
AI3 - Additive
Feed Forward
Secondary This analog input signal value is added to the
secondary PID result to make up the Control
Output value when Auto operation is active. TB1-13
TB1-14 (+)
TB1-15 (-) 4
9 (+)
8 (-) +24 V
AI3
SC
AO0 - Control
Output
(Secondary) This is the 4-20 mA output signal that drives the
final control element. TB1-17 (+)
TB1-18 (-) 10 (+)
11 (-) AO0
PC
AO1 -
Secondary
Setpoint
Transmit This output signal reflects the setpoint input
value to the secondary from the primary output. TB1-19 (+)
TB1-20 (-) 12 (+)
11 (-) AN01
PC
DI0 -
Cascade
Enable When a closed contact is present on this input,
cascade operation is enabled if the R/L push
button is in Remote. TB2-1 (+)
TB2-2 (-) 13 (+)
14 (-) DI0
PC
DI1 - 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. TB2-3 (+)
TB2-4 (-) 15 (+)
14 (-) DI1
PC
DO0 - Process
Alarms
Secondary This contact is closed when the secondary loop
Process Variable value is not within the C103
and C104 datapoint values (secondary loop
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
12-2