SATEC BFM136 - Manual (Page 48)

‎Chapter 4 PAS Application Software Configuring Billing Energy and TOU Registers
48 BFM136 Branch Feeder Monitor
The following table describes the setpoint options.
Option Range Description
Trigger
parameter See Appendix D The trigger parameter that is used as an argument in
the logical expression
Operate limit The threshold (in primary units) at which the
conditional expression would be evaluated to true. Not
applicable for time triggers.
Release limit The threshold (in primary units) at which the
conditional expression would be evaluated to false.
Defines the hysteresis for analog triggers. Not
applicable for digital triggers.
Operate delay 0.1-999.9 sec The time delay before operation when the operate
conditions are fulfilled
Release delay 0.1-999.9 sec The time delay before release when the release
conditions are fulfilled
Action See Appendix D The action performed when the setpoint expression is
evaluated to true (the setpoint is in operated state)
Using Numeric Triggers
For numeric (analog) triggers, a setpoint allows you to specify two thresholds
for each trigger to provide hysteresis (dead band) for setpoint operations.
The operate limit defines the operating threshold, and the second release
limit defines the release threshold for the trigger. If you do not want to use
hysteresis for the trigger, set the release limit to the same as the operate
limit.
Using Time Triggers
If you want the setpoint actions to be synchronized with the clock, for
example, to provide recording interval data, use the minute time interval
trigger that generates periodic events synchronized with the device clock.
Delaying Setpoint Operations
Two optional delays can be added to each setpoint to extend monitoring a
setpoint trigger for a longer time before making a decision on whether the
expected event occurred or not. When a delay is specified, the logical
controller will change the setpoint status only if all conditions are asserted for
a period at least as long as the delay time.
Using Setpoint Events
When a setpoint status changes, i.e., a setpoint event is either asserted or
de-asserted, the following happens in your device:
1. The new setpoint status is logged to the setpoint status register that can
be monitored via communications from the user application software in
order to give a real-time indication on the expected event.
2. The operated setpoint status is latched to the setpoint alarm register
accessible through communications. The register holds the last setpoint
alarm status until it is explicitly cleared via communications.
Recording Setpoint Events
Time-tagged setpoint events can be recorded to the submeter event log if
you select it as the setpoint action. The Event recorder logs any setpoint
transition event: both when the setpoint is operated, and when it is released.
Configuring Billing Energy and TOU Registers
The BFM136 provides four total/summary energy and six parallel tariff
energy and maximum demand registers for each individual submeter. The
registers can be linked to any internal energy source or to another submeter.