11

1-InA

Display

Decimal Point

dECPt

Input

Range

rANgE

Display

Rounding

round

Scaling

Style

StYLE

FILtr

Filter

Setting

bANd

Filter

Band

Scaling

Points

PtS

Display x

Value

dSP

Input x

Value

INP

xx

PAR

Pro

rAtE

Conversion

Rate

11

6.1 mOdUle 1 - signal inPUT ParameTers









ADC CONVERSION RATE

Select the ADC conversion rate (conversions per second). The selection does

not affect the display update rate, however it does affect setpoint and analog

output response time. The default factory setting of 19.8 is recommended for

most applications. Selecting a fast update rate may cause the display to appear

very unstable.















1-Inb

Display

Decimal Point

dECPt

Input

Range

rANgE

Display

Rounding

round

Scaling

Style

StYLE

FILtr

Filter

Setting

bANd

Filter

Band

Scaling

Points

PtS

Display x

Value

dSP

Input x

Value

INP

xx

PAR

Pro

rAtE

Conversion

Rate

INPUT A PARAMETER MENU

INPUT B PARAMETER MENU









INPUT RANGE

Select the input range that corresponds to the external signal. Before

applying signal configure input jumper to match setting desired.

20.000 mA

10.000 V









RANGE RESOLUTION

SELECTION



















DISPLAY DECIMAL POINT

Select the decimal point location for the Input display. (The

TOT display

decimal point is a separate parameter.) This selection also affects , 

and  parameters and setpoint values.









DISPLAY ROUNDING*















Rounding selections other than one, cause the Input Display to ‘round’ to the

nearest rounding increment selected (ie. rounding of ‘5’ causes 121 to round to

120 and 124 to round to 125). Rounding starts at the least significant digit of

the Input Display. Remaining parameter entries (scaling point values, setpoint

values, etc.) are not automatically adjusted to this display rounding selection.









FILTER SETTING

The input filter setting is a time constant expressed in tenths of a second. The

filter settles to 99% of the final display value within approximately 3 time

constants. This is an Adaptive Digital Filter which is designed to steady the

Input Display reading. A value of ‘0’ disables filtering.



to  seconds









FILTER BAND*

The digital filter will adapt to variations in the input signal. When the

variation exceeds the input filter band value, the digital filter disengages. When

the variation becomes less than the band value, the filter engages again. This

allows for a stable readout, but permits the display to settle rapidly after a large

process change. The value of the band is in display units, independent of the

Display Decimal Point position. A band setting of ‘0’ keeps the digital filter

permanently engaged.



to  display units









SCALING POINTS

Linear - Scaling Points (2)

For linear processes, only 2 scaling points are necessary. It is recommended

that the 2 scaling points be at opposite ends of the input signal being applied.

The points do not have to be the signal limits. Display scaling will be linear

between and continue past the entered points up to the limits of the Input Signal

Jumper position. Each scaling point has a coordinate-pair of Input Value ()

and an associated desired Display Value ().

Square Root Extraction Input Range - Scaling Points (2)

The PAXDP can apply the square root function directly to the sensor signal

by selecting the Square Root Extraction Input Range ( or ). When

configured for Square Root Extraction, piecewise multipoint linearization is not

required and only the first 2 scaling points are used. For proper operation the

Display 1 ( ) value must be zero.

Nonlinear - Scaling Points (Greater than 2)

For non-linear processes, up to 16 scaling points may be used to provide a

piece-wise linear approximation. (The greater the number of scaling points

used, the greater the conformity accuracy.) The Input Display will be linear

between scaling points that are sequential in program order. Each scaling point

has a coordinate-pair of Input Value () and an associated desired Display

Value (). Data from tables or equations, or empirical data could be used to

derive the required number of segments and data values for the coordinate pairs.

In the Crimson 2 (SFCRM2) software, several linearization equations are

available. See the Accessories section for more information.



to 

* The decimal point position is dependent on the selection made in the

“Display Decimal Point” parameter.









SCALING STYLE

If Input Values and corresponding Display Values are known, the Key-in

() scaling style can be used. This allows scaling without the presence or

changing of the input signal. If Input Values have to be derived from the actual

input signal source or simulator, the Apply () scaling style must be used.

apply signal



key-in data



±20.000 mA - Square Root Extraction

±10.000 V - Square Root Extraction