Response Electronics CL6011B Especificaciones descargar pdf (Pagina 94)

4Ć12 DCP Configuration

Original Ć June 1990CE4.2:CL6211

Low Scale Value Ċ The low scale value represents the 0-percent value

of the process variable, in engineering units. The valid range for low

scale value is any floating point number; however, it may not be the

same as the high scale value. For weigh scale interface, 0 must be

entered. For other inputs, select the level in engineering units

corresponding to the minimum expected value of the process variable.

This configuration item may be changed using DDP #1, EU 0%.

PCA Type Ċ The PCA of the Direct Control Point determines the

algorithm that will be used to process the PV. The valid types are:

H Manual Loader H ErrorĆSquared PI/PID

H Bias and Gain H Notch Gain PI/PID

H Signal Selector H Adaptive Gain PI/PID

H P/PD with Bias H Control Sequence

H PI/PID/I H Control Sequence with Bias

Refer to Table NO TAG (page NO TAG) for a description of the various

PCA types.

Table 4Ć3. List of Valid PCA Types

PCA NUMBER PCA TYPE DESCRIPTION

1 Manual loader Remotely positions a final control element under operator control.

2 Bias and Gain Provides a proportional bias and gain function on the process

variable input. Bumpless transfer is provided by a transfer bias.

3 High/Low Signal Selector Provides a four-input signal selector with high or low signal

selection and logic outputs indicating the selected input.

4 P/PD with Bias Provides a standard proportional or proportional and rate control

action with an adjustable bias for manual reset.

5 PI/PID/I Provides a standard proportional and reset or proportional, rate,

and reset control action or an integral-only function.

6 Error-Squared PI/PID Provides a proportional and reset or proportional, rate, and reset

control action in which the proportional action acts upon the error

squared.

7 Notch Gain PI/PID Provides a proportional and reset or proportional, rate, and reset

control action in which the proportional action can be decreased

within a given range of the process variable.

8 Adaptive Gain PI/PID Provides a proportional and reset or proportional, rate, and reset

control action in which the proportional action can be changed:

(1) Outside a given range of process variable, deviation from set

point, valve output, or some analog value; (2) When a discrete

value changes state; (3) When a combination of events from 1

and 2 are true.

9 Control Sequence Computes an error signal which can then be modified by

user-selected functions. Set point tracking, limiting, and velocity

limiting are available.

10 Control Sequence with Bias Identical to control sequence PCA except that transfer ramping

and an operator adjustable bias are also provided.

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 319 320

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Response Electronics CL6011B Especificaciones Pagina 94

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