Red Lion PAX2D - Manual (Page 11)

11
Counter B Selections
SELECTION MODE DESCRIPTION
NONE
None Does not count.
bAtCH Batch Counter B internally counts the number of output
activations of the selected setpoint(s). The count
source is selected in the Yes/No sub-menu shown
for each setpoint (bAt S1 thru bAt S4).
Cnt Count X1 Adds Input B falling edge.
dCntUd Dual Count
X1 w/direction
Adds Input B falling edge if User 2 is high.
Subtracts Input B falling edge if User 2 is low.
dqUAd1 Dual Count
Quad X1
Adds Input B rising edge when User 2 is high.
Subtracts Input B falling edge when User 2 is high.
dqUAd2 Dual Count
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.
Cnt2 Count X2 Adds Input B rising and falling edges.
dCtUd2 Dual 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.
Counter C Selections
SELECTION MODE DESCRIPTION
NONE
None Does not count.
Cnt A Counter A Counter C counts the incoming pulses from Counter A
input as per Counter A mode of operation. The signal
is scaled only according to Counter C parameters.
Cnt b Counter B Counter C counts the incoming pulses from Counter B
input as per Counter B mode of operation. The signal
is scaled only according to Counter C parameters.
Add Ab Counter A +
Counter B
Counter C counts the incoming pulses from Counter A
and B inputs as per Counter A and B modes of
operation. The result is scaled only according to
Counter C parameters. (Example: If Counter A is set
for Count X1 mode and Counter B is set for Count X2
mode, then Counter C will increment by 1 for each
pulse received on Input A and increment by 2 for each
pulse received on Input B. Counter C scale settings
are then applied and the result displayed.)
Sub Ab
Counter A –
Counter B
Counter C counts the incoming pulses from Counter A
and B inputs as per Counter A and B modes of
operation and subtracts the B counts from the A
counts. The result is scaled only according to Counter
C parameters. (Example: If Counter A is set for Count
X1 mode and Counter B is set for Count X2 mode,
then Counter C will increment by 1 for each pulse
received on Input A and decrement by 2 for each pulse
received on Input B. Counter C scale settings are then
applied and the result displayed.)
Note: Counter A, B and C must all be reset at the same time for the math to be
performed on the display values.
bAtCH Batch Counter C internally counts the number of output
activations of the selected setpoint(s). The count
source is selected in the Yes/No sub-menu shown for
each setpoint (bAt S1 thru bAt S4).
SLAUE
Slave Counter C functions as a serial slave display. See
Serial Communications section for details.
COUNTER DECIMAL POSITION
0 0.00 0.0000
0.0 0.000 0.00000
This selects the decimal point position for the selected counter, and any
setpoint value assigned to that counter. The selection will also affect that
counter’s scale factor calculations.
COUNTER SCALE FACTOR
0.00001 to 9.99999
The number of input counts for the selected counter 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. For


and
 
modes of operation, the math is performed on the input signals
and then the result is scaled by Counter C scaling. To achieve correct results,
both Input A and Input B must provide the same amount of pulses per unit of
measurement. (Details on scaling calculations are explained at the end of this
section.) Scale Factor values can also be entered during Program Lockout, if
enabled in the Parameter Display loop. See “Line 2 Display Access” in the Display
Parameter Module.
COUNTER SCALE MULTIPLIER
10 1 0.1 0.01
The number of input counts for the selected counter is multiplied by the scale
multiplier and the scale factor to obtain the desired process value. (Details on
scaling calculations are explained at the end of this section.)
COUNTER RESET ACTION
ZErO Cnt Ld
When the selected counter is reset, it returns to zero or the counter count load
value. This reset action applies to all selected counter resets, except a setpoint
generated counter auto reset programmed in the Setpoint Output Parameter
Module.
COUNTER COUNT LOAD VALUE
-199999 to 999999
When Reset To Count Load action is chosen, the selected counter will reset
to this value. Count Load values can also be entered during Program Lockout,
if enabled in the Parameter Display loop. See “Line 2 Display Access” in the
Display Parameter Module.
COUNTER RESET AT POWER-UP
NO YES
The selected counter may be programmed to reset at each meter power-up.
The next two parameters will only appear when programming Counter A.
PRESCALER OUTPUT ENABLE
NO YES
This enables the prescaler output. The prescaler output is useful for providing
a lower frequency scaled pulse train to a PLC or another external counter. On
each falling edge of Input A, the prescaler output register increments by the
prescaler scale value (PS SCL). When the register equals or exceeds 1.0000, a
pulse is output and the register is lowered by 1.0000. The prescaler register is
reset to zero whenever Counter A is reset (except for Setpoint Counter Auto
Reset). (See Prescaler Output Figure.)
PRESCALER SCALE VALUE
0.0001 to 1.0000
The prescaler output frequency is the Input A frequency times the prescaler
scale value.
PRESCALER OUTPUT FIGURE
dEC Pt
0
Ct x
1
3
2
4
SC FAC
1.00000
Ct
x
1
3
2
4
SCALEr
1
Ct x
1
3
2
4
RESEt
ZErO
Ct x
1
3
2
4
Cnt Ld
500
Ct x
1
3
2
4
R P-UP
N0
Ct x
1
3
2
4
PS OUt
NO
IPA
1
3
2
4
PS SCL
1.0000
IPA
Prescaler Output Value = 0.25