Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Installation - Manual (Page 78)

4.2 CS 20 TWO-LOOP STANDARD PID
If Model Number 53MC52X1 has been purchased, the controller is shipped from the factory loaded
with the FCS CS20 for Two-Loop Standard PID. Other strategies are described in Section 4.3 of In-
struction Bulletin 53MC5000 .
4.2.1 CS 20 TWO LOOP PID DESCRIPTION
The "Two Loop PID" configuration of the Flexible Control Strategy (FCS) is designed to fulfill the re-
quirements of a large majority of process applications. CS20 implements two standard feedback
control loops which automatically controls two process variables (PV) at predetermined setpoints
(SP). The process variables and the control signal outputs are the only essential signals in this con-
figuration. CS20 is loaded from the EPROM to set-up the FCS with a minimum of configuration ef-
fort. The user need only configure the proper ranges and setpoints for a particular application.
Loading CS20 generates the softwiring required and initializes AI1’s Engineering Span to 100.0
and the display list sequence to incorporate a second display group (CON1). Figure 4-2 is a block
diagram of this control strategy. The following I/O assignments result:
AI0 - PROCESS VARIABLE LOOP 1
AI1 - PROCESS VARIABLE LOOP 2
AI2 - REMOTE SETPOINT LOOP 1
AI3 - REMOTE SETPOINT LOOP 2
AO0 - CONTROL OUTPUT LOOP 1
AO1 - CONTROL OUTPUT LOOP 2
DI0 - REMOTE ENABLE LOOP 1
DI1 - REMOTE ENABLE LOOP 2
DO0 - PROCESS ALARMS LOOP 1
DO0 - PROCESS ALARMS LOOP 2
4.2.2 SETTING UP THE STANDARD LOOP
All Two Loop 53MC5000’s are shipped from the factory with CS20 loaded. For instruments being in-
stalled for the first time, Steps 1, 2 and 3 are not required.
1. If the state of the database is unknown, it should be set to default values. This is done by config-
uring B00 to load a default database. B00 is the Function Index (FIX) of the controller, which identi-
fies the type of control strategy being executed. Entering 98 in B00 will load the default values.
When the default process is complete, B00 will reset to 0 and the display will show the logo.
This means the 53MC5000 is in "Suspend mode" (B00=0) and the processor is halted.
MODULAR CONTROLLER QUICK START
4-8