PAX-1SLASH8 datasheet(13/32 Pages) REDLION

13 / 32 page

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COUNTER B OPERATING MODE

Select the operating mode for Counter B.

SELECTION

MODE

DESCRIPTION



Does not count.



Count X1

Adds Input B falling edge.



Count X1

w/direction

Adds Input B falling edge if User 2 is high. Subtracts

Input B falling edge if User 2 is low.



Quad X1

Adds Input B rising edge when User 2 is high.

Subtracts Input B falling edge when User 2 is high.



Quad X2

Adds Input B rising edge when User 2 is high and

Input B falling edge when User 2 is low. Subtracts

Input B falling edge when User 2 is high and Input B

rising edge when User 2 is low.



Count X2

Adds Input B rising and falling edges.



Count X2

w/direction

Adds Input B rising and falling edges if User 2 is

high. Subtracts Input B rising and falling edge if User

2 is low.

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



COUNTER B RESET ACTION

When Counter B is reset, it returns to zero or Counter B count load value.

This reset action affects all Counter B resets, except the Setpoint Counter Auto

Reset Action in Module 6.

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COUNTER B DECIMAL POSITION

This selects the decimal point position for Counter B and any setpoint value

assigned to Counter B. The selection will also affect Counter B scale factor

calculations.

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

COUNTER B SCALE FACTOR

The number of input counts is multiplied by the scale factor and the scale

multiplier to obtain the desired process value. A scale factor of 1.00000 will

result in the display of the actual number of input counts. (Details on scaling

calculations are explained at the end of this section.)



to 

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

COUNTER B SCALE MULTIPLIER

The number of input counts is multiplied by the scale multiplier and the scale

factor to obtain the desired process value. A scale multiplier of 1 will result in

only the scale factor affecting the display. (Details on scaling calculations are

explained at the end of this section.)

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COUNTER B COUNT LOAD VALUE

When reset to count load action is selected, Counter B will reset to this value.

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to 





























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



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SCALING CALCULATIONS

Each counter has the ability to scale an input signal to a desired display

value. This is accomplished by the counter mode (x-), scale factor (x),

scale multiplier (x) and decimal point (x). The scale factor is

calculated using:

SF (x) =

Desired Display Decimal DDD

(Number of pulses per ‘single’ unit x CM x SM)

Where:

Desired

Display

Decimal DDD

x

Counter Decimal Selection

None

0.0

Tenths

100

0.00

Hundredths

1000

0.000

Thousandths

10000

0.0000

Ten Thousandths

100000

0.00000

Hundred Thousandths

Number of pulses per ‘single’ unit: pulses per unit generated by the

process (i.e. # of pulses per foot)

CM: Counter Mode(x-) times factor of the mode 1,2 or 4.

SM: Scale Multiplier (x) selection of 1, 0.1 or 0.01.

Example:

1. Show feet to the hundredths (0.00) with 100 pulses per foot:

Scale Factor would be 100 / (100 x 1 x 1) = 1

(In this case, the scale multiplier and counter mode factor are 1)

2. Show feet with 120 pulses per foot: Scale Factor would be 1 / (120 x 1 x 1)

= 0.0083333. (In this case, the scale multiplier of 0.01 could be used: 1 / (120

x 1 x 0.01) = 0.83333 or show to hundredths (0.00): 100 / (120 x 1 x 1) =

0.8333.)

General Rules on Scaling

1. It is recommended that, the scale factor be as close as possible to, but not

exceeding 1.00000. This can be accomplished by increasing or decreasing

the counter decimal point position, using the scale multiplier, or selecting a

different count mode.

2. To double the number of pulses per unit, use counter modes direction X2 or

quad X2. To increase it by four times, use counter mode quad X4. Using

these modes will decrease the maximum input frequency.

3. A scale factor greater than 1.00000 will cause Counter display rounding. In

this case, digit jumps could be caused by the internal count register rounding

the display. The precision of a counter application cannot be improved by

using a scale factor greater than 1. 00000.

4. The number of pulses per single unit must be greater than or equal to the

DDD value for the scale factor to be less than or equal to one.

5. Lowering the scale factor can be accomplished by lowering the counter

decimal position. (Example: 100 (Hundredths)/10 pulses = 10.000 lowering

to 10 (Tenths)/10 = 1.000.)

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COUNTER B RESET POWER-UP

Counter B may be programmed to reset at each meter power-up.

8 DIGIT COUNT VALUES

Any counter display value below -99999 or above 999999 (less decimal

point) will consist of a two part display. This display alternates between the

least 6 significant digits and the remaining most significant digits beginning

with “” in the display. If the display exceeds ± 99999999 the display will roll

to zero and continue counting. Outputs cannot be set to counter values above 6

digits. The annunciator, indicating the counter being displayed, will flash when

the value is above 6 digits.





PAXI: PRESCALER SCALE VALUE

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to 

The prescaler output frequency

is the Input A frequency times the

prescaler scale value.

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