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D
IGITAL
P
ULSE
I
NPUTS
The PowerScout 24 can detect digital signals (dry contacts) of minimum 10 milliseconds in duration. The
green LED will stay on while the pins are shorted together. When the port is used as an input, the green
LED is lit when the port contacts close due to an external device.
Pulse Input Port Functions
Pulse input is used to count, accumulate and scale pulses received from non-DENT external pulse-
initiating meters such as gas, water, or other electrical meters.
Modbus Input Port Registers
Refer to the following two tables to configure the PowerScout24 input ports.
Modbus
Register
Offset
Register Name
Detailed Description
44400
4399
I/O port 1 status
0 = input LOW (switch is closed)
1 = input HIGH (switch is open)
45100
5099
Configures the pulse input for I/O
port 1
0 = off, pulse input disabled
1 = rising edge, pulse counter increments, falling
edges are ignored. If pulse output is enabled, it is
disabled when this configuration is set.
2 = falling edge, pulse counter increments, rising
edges are ignored. If pulse output is enabled, it is
disabled when this configuration is set.
3 = both edges pulse counter increments. If pulse
output is enabled, it is disabled when this
configuration is set. (Note when pulse is off, I/O
control is enabled)
Setting this register to a value other than 0, forces
register 45110 to 0.
45101
5100
I/O port 1 pulse input
accumulator LSW
Scaled pulse LSW
45102
5101
I/O port 1 pulse input
accumulator MSW
Scaled pulse MSW
45103
5102
I/O port 1 pulse input scaling
(integer)
Integer scale factor
(Scale = 45103 + 45104/1000)
45104
5103
I/O port 1 pulse input scaling
(decimal)
x1000 decimal fraction of scale factor
Table F-6: Modbus Port 1 Pulse Input
97
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