Response Electronics CL6011B Especificaciones descargar pdf (Pagina 98)

4Ć16 DCP Configuration

Original Ć June 1990CE4.2:CL6211

Restart from Last SP Ċ This configuration item allows the use of the

Restart SP value after a power fail has occurred. If NO is selected, the

restart SP value defined in the Restart SP configuration item is used. If

YES is selected, the last SP value prior to power fail is restored upon

restart.

Restart Ratio Ċ Defines the initial value of the ratio after a power fail

restart, if the Restart from Last Ratio enable configuration item is

answered NO. The valid range is 0.02 to 50.0; this parameter is

unit-less, and can be changed using DDP #32, RST RAT.

Restart SP Ċ Used to define the initial value of the SP after a power fail,

if the Restart from Last SP enable configuration item is answered NO.

The valid SP range is -13.97 to 113.97 percent of the engineering unit

span. The restart SP value may be changed using DDP #30, RST SP.

Signal Select Ċ This Signal Selector PCA configuration item determines

whether the selected signal will correspond to the highest or the lowest

implied valve position (IVP). When the signal selector is in the automatic

mode, the signal present at the selected input is transferred to the

output. A HIGH signal selector selects the input that will cause the

highest IVP; LOW selects the lowest IVP. The selection is based on the

increase open/close setting for the Direct Control point, i.e., a HIGH

selector will select the input that will result in the largest IVP for an

increase-open valve, or the input that will result in the lowest IVP for an

increase-close valve. In an override scheme, all Direct Control points

connected to the signal selector and the signal selector inputs must have

increase open valve action.

SP High Limit Ċ The set point high limit is the highest set point that can

be selected for the Direct Control point. set point high limit is expressed

in engineering units and must be between -13.97 and 113.97 percent of

the engineering unit span. The limit may be changed by tuning DDP

#17, SP HI LM.

SP Low Limit Ċ The set point low limit is the lowest set point that can

be selected for the Direct Control point. set point low limit is expressed

in engineering units and must be between -13.97 and 113.97 percent of

the engineering unit span. The limit may be changed by tuning DDP

#16, SP LO LM.

SP Tracks PV in Manual Enable Ċ Permits the set point to track the

process variable when the Direct Control point is in the manual mode.

This will cause the set point to identically match the process variable

within the limits established by the SP high and low limits.

SP Velocity Limit Ċ Limits the internal SP value used by the Direct

Control Point for control and alarming to a maximum rate of change,

when the point is in AUTO mode. The valid range is any floating point

value in the range 0.0 to 976.369 EUs per minute. The limit may be

changed by tuning DDP #15, SP VL LM.

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 319 320

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Response Electronics CL6011B Especificaciones Pagina 98

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