Micromod Micro-DCI: 53SL5100B Single Loop Controller - Manual (Page 67)

53SL5100B Single-Loop Controller
INSTRUCTION MANUAL
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8 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 element control of the process,
but is displayed for visual indication of the process status. These events are illustrated in Figure 8-1.
Figure 8-1. Automatic/Manual Station Output Control
As illustrated in Figure 8-2, Automatic/Manual Station Block Diagram, when a 4 is loaded into System Module
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