74
Appendix C—Digital I/O Functions
D
IGITAL
P
ULSE
O
UTPUTS
There is one configurable digital pulse output port on the SPP. The ports can be used to output kWh,
kVARh, or kVAh pulses to external devices, or to toggle on and off to control a remote device or relay.
Pulse Output Port Function
Pulse output is used to generate pulses for external devices such as data loggers that can accept pulses
but do not have BACnet or Modbus capability. The Power Patrol can generate pulses based on
accumulated value(s) such as system kWh, system kVARh, and system kVAh. When a pulse is generated
by the meter, the orange LEDs will briefly flash, otherwise they will remain dark.
The BACnet pulse output 12030 is scaled by the same data scalar as the Modbus register (44602). For
example, when the data scalar is set to 3, each pulse will represent .1 kWh, .1kVAh and .1kVARh.
Data Scalar
Pulse Scalar Value
kWh
kVAh
kVARh
0
.00001
.00001
.00001
1
.001
.001
.001
2
.01
.01
.01
3
.1
.1
.1
4
1
1
1
5
10
10
10
≥6
100
100
100
Table C-1: Pulse Scalar Values
For system pulse output:
kWh pulse output—write
44001
into the pulse output configuration object.
kVAh pulse output—write
44011
into the pulse output configuration object.
kVARh pulse output—write
44008
into the pulse output configuration object.