Micromod Micro-DCI: 53SL5100A Single Loop Controller - Manual (Page 93)

Single Loop Process Controller Instruction Manual
Automatic/Manual Station 85
8.0 Automatic/Manual Station
8.1 Automatic/Manual Station Operation Overview
The Automatic/Manual Station is a conventional single station selector. In Auto, the auto input (Analog
Input 0) is passed directly through the station to the output (Analog Output 0). In Manual, the station
functions as a manual loader, allowing the output to be controlled from the front panel pushbuttons.
If the process variable (Analog Input 1) exceeds tolerable limits of change, the station activates a signal
(CCO0) to an alarm. The process variable feedback signal is not used to generate an output for final ele-
ment control of the process, but is displayed for visual indication of the process status. These events are
illustrated in
Figure 8-1 .
As illustrated in Figure 8-2 , Automatic/Manual Station Block Diagram, when a 4 is loaded into System Mod-
ule datapoint B00 to indicate CS4, the signal designators are as follows:
1. ANIO = Auto Input
2. ANI1 = Process Variable/Alarm
3. ANO0 = Station Output
4. CCIO = Enable Auto
5. CCO0 = Process Alarm
Figure 8-1. Automatic/Manual Station Output Control