PD6830X Explosion-Proof Modbus Scanners
Instruction Manual
39
Quadrature Pulse Output (
QUAD
)
The pulse output set to quadrature will duplicate the
other open collector output, but lag by ¼ duty cycle
(90 degrees out of phase). For example, Out 1 will
follow Out 2, if Out 1 is set to
QUAD
. Only one output
should be set to
QUAD
. If both outputs are set to
QUAD
,
both outputs will be disabled. The other output should
be programmed as desired for the quadrature output
function, and must be a pulse (
PUlse
) output
selection.
Test Pulse Output (
test
)
The test output setting programs the output to
generate pulses at a programmed constant
frequency. Set the frequency decimal point location in
the
DECPT
menu, and then enter the desired output
frequency in Hz in the
PULSE
menu.
Modbus PV or Math Pulse Output (
PV
)
The pulse output may be based on an enabled
Modbus PV or math channels CV1 to CV4. The pulse
output frequency in hertz (Hz) is calculated as the
value of the selected PV or CV divided by the
programmable count (or divisor).
𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂𝑂
𝐹𝐹𝐹𝐹𝐹𝐹𝐹𝐹𝑂𝑂𝐹𝐹𝐹𝐹𝐹𝐹𝐹𝐹
(
𝐻𝐻𝐻𝐻
) =
(
𝑃𝑃𝑃𝑃
𝑜𝑜𝐹𝐹
𝐶𝐶𝑃𝑃
𝑃𝑃𝑉𝑉𝑉𝑉𝑂𝑂𝐹𝐹
)
𝐶𝐶𝑜𝑜𝑂𝑂𝐹𝐹𝑂𝑂
The frequency of the pulse output will update as the
PV or CV value is changed.
For example, if the output is set to reference PV 2,
and PV 2 is reading 1540.5, with a count or 10, the
pulse output frequency will be 154.05 Hz.
Alarm Output (
ALARM
)
Alarm outputs may be assigned to Modbus PV or
math channel (
PV NUM
), always on (
ON
) or always off
(
OFF
).
Note 1: Refer to pulse input manual
Modbus PV or Math Alarm (
PV NUM
)
Program a PV (PV1-16) or math channel (CV1-4) to
trigger an alarm. Select the source PV or CV for the
alarm and enter the display value set and reset
points. The alarm deadband is determined by the
difference between set and reset points. Minimum
deadband is one display count. If set and reset points
are programmed the same, output will reset one count
below set point.
Note 1
Note 1
Note 1
