Response Electronics CL6011B Especificaciones descargar pdf (Pagina 35)

3Ć15 Theory of Operation: Point Processing

Original Ć June 1990 CE4.2:CL6211

GF=1

GF>1

1>GF>0

0% 100%

Valve Position

Lower

Break

Point

Upper

Break

Point

Figure 3Ć6. Implied Valve Position Adaptive Gain

Discrete Adaptive Gain Ċ The Discrete Adaptive Gain Modifier (DAGM)

FST instruction will change the loop's active gain based on the value of a

discrete register or loadable function and the value of the discrete gain

factor. The discrete adaptive gain factor will be set equal to the discrete

gain factor when the discrete value is equal to one. The discrete

adaptive gain factor will be set equal to the unity gain when the discrete

value is equal to zero. Figure 3Ć7 illustrates the operation of the discrete

adaptive gain function. See the FST Section for more information on the

DAGM instruction.

GF=1

GF>1

1>GF>0

Discrete

Input

Time'0' '1'

Figure 3Ć7. Discrete Adaptive Gain

3.3.1.9 Control Sequence with and without Bias

The Control Sequence PCA provides a limited set of functions upon

which a user-defined algorithm may be based. The Control Sequence

PCA provides display and communications interface for the loop, and

also calculates the difference between the loop's process variable and

set point. Valve increase open/close adjustment, trip points for alarms A,

B, C, and D, and set point high/low limits are also provided.

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Response Electronics CL6011B Especificaciones Pagina 35