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PULSE TOTALIZER APPLICATION
A–24
Courtesy of NationalSwitchgear.com
A.9
Pulse Totalizer Application
The PQM has up to 4 Logical Switch Inputs that can be configured as Pulse Input Counters.
One common application of these Pulse Inputs is their use as an energy totalizer for more
than one circuit. One PQM can totalize input from up to 4 different sources and sum these
results into a single register. Variables to consider when using the PQM as a Pulse Input
Counter are:
•
PQM Switch Input A/B/C/D Function
•
PQM Switch Input A/B/C/D Activation
•
PQM Switch Input A/B/C/D Name
•
PQM Pulse Input (Units)
•
PQM Pulse Input 1/2/3/4 (Value)
•
PQM Totalized Pulse Input
1.
PQM Switch Input A/B/C/D Function: This parameter defines the functionality to be
provided by the PQM Switch Input. For use as a Pulse Input Counter, the PQM Switch
Input to be used must be assigned as either Pulse Input 1/2/3 or 4.
2.
PQM Switch Input A/B/C/D Activation: This parameter is set to OPEN or CLOSED. The
PQM will see the operation of the Switch Input in the state as defined by this parame-
ter.
3.
PQM Switch Input A/B/C/D Name: This parameter defines the name given to each of
the Switch Inputs used. It is used as a label only and has no bearing on the operation
of the Switch Input.
4.
PQM Pulse Input (Units): This parameter is the name given to the base units that the
PQM Pulse Input(s) will be counting. It is used as a label only and has no bearing on the
operation of the Pulse Input.
5.
PQM Pulse Input 1/2/3/4 Value: This is the value assigned to each counting operation
as determined by the Switch Input.
6.
PQM Totalized Pulse Input: This parameter creates a summing register of the various
Pulse Inputs configured. It can be configured for any combination of the PQM Switch
Inputs used as Pulse Inputs.
APPENDIX A: APPLICATION NOTES
PQM POWER QUALITY METER – INSTRUCTION MANUAL
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