PD6830X Explosion-Proof Modbus Scanners
Instruction Manual
9
Math Channels
Math Result
Chanels
Four math channels CV1-CV4.
Each math channel may be
programmed for a math function.
Math Functions
Parameter 1 (PAR1), parameter 2
(PAR2), and parameter 3 (PAR3)
independently programmable for each
math channel C1-C4.
Math Function
Function
Setting
Addition
PAR1 + PAR2
SUM
Difference
PAR1 - PAR2
DIF
Multiplication
PAR1 * PAR2
MULTI
Division
PAR1 / PAR2
DIVIDE
Absolute diff.
Abs(PAR1 - PAR2)
DIFABS
Weighted avg.
((PAR1 – PAR2)*PAR3) +PAR2
WAVG
Draw
((PAR1 / PAR2) – 1) * PAR3
DRAW
Ratio
(PAR1 / PAR2) * PAR3
RATIO
Concentration
PAR1 / (PAR1 + PAR2) * PAR3
CONCEN
Constant
Constant
CONST
Long Integer
Constant
LONG
Floating Pt.
Constant
FLOAT
None
Disable
NONE
Absolute Value
Abs(PAR1)
ABS
Square Root
√
(PAR1)
SQrt
Parameter
Selection
Parameter 1 (PAR1), parameter 2
(PAR2), and parameter 3 (PAR3)
selectable as: Modbus PV1-16, math
channel CV1-4 or any math function.
Parameter
Nested Math
Defining parameter 1 or 2 as a math
function will prompt for level 2
parameter 1 (L2P1), level 2 parameter
2 (L2P2), and/or level 2 parameter
3 (L2P3). Level 2 parameters function
identically as parameter 1 and 2 for
nested math functions.
4-20 mA Transmitter Output
Output Source
Modbus PV 1-16, math channel 1-4, or
disabled
Scaling Range
4.000 to 20.000 mA for any display range.
Disable
If disabled, the output will output 3.2 mA
Calibration
Factory Calibrated:
0.0 to 1000.0 = 4-20 mA output
Underrange
Output Underrange: 3.8 mA
Overrange
Display Overrange: 20.5 mA
Output Overrange: 20.5 mA
Accuracy
± 0.05% span ± 0.004 mA
Temperature
Drift
0.08 µA/
°
C max from -40 to 75
°
C ambient
External Loop
Power Supply
30 VDC maximum
Output Loop
Resistance
Power supply Minimum
Maximum
24 VDC
10
Ω
750
Ω
30 VDC
100
Ω
1100
Ω
Open Collector Outputs
Output
Assignment
Two open collector pulse outputs.
Individually programmable for Modbus PV,
math channel, constant timed pulse output;
quadrature outputs (requires Out 1 and
Out 2), or off.
Rating
Isolated open collector, sinking NPN,
30 VDC @ 150 mA max.
Alarm Output
Assign to Modbus PV 1-16 or math channel
1-4, for high or low alarm trip point.
Alarm Deadband
0-100% FS, user selectable
Alarm
Acknowledge
Front panel ACK button resets output and
screen indication.
Pulse Output
Count
The pulse output count (
COUNT
) is
programmable from 0.000001 to 9999999.
PV and math channels generate a frequency
equal to the PV or math value divided by the
Count value.
Pulse Output
Pulse Width
Unless otherwise stated, pulses are 50%
duty cycle for required frequency.
Pulse Output
Maximum
Frequency
5 kHz, pulse width at 50% duty cycle.
If the outputs exceed 5 kHz, the scanner
will display
pUlse
OVERRNG
Quadrature
Output
Output set to quadrature will lag the other
pulse output by 90° (1/4 duty cycle) at
output frequency. Minimum 1 Hz
Timer Output
Programmable on and off time, repeating
cycle. Minimum period 0.1 second,
maximum 100,000 seconds.
Minimum pulse time 0.01 second,
maximum 10,000 seconds.
