SATEC EM720 Operation Manual - Manual (Page 83)

Chapter 5 Configuring the EM720
General Meter Setup
EM720 Power Quality and Revenue Meter 83
Parameter Options Default Description
Debounce time 1-1000 ms 10 ms The amount of time while the state of the
digital input should not change to be
recognized as a new state. Too low
debounce time could produce multiple
events on the input change.
Fault Recorder Checked
Unchecked Unchecked When the box is checked, a positive
transition on the digital input (open to
closed transition event) triggers the Fault
recorder.
Debounce Time
The debounce time is assigned in groups of 2 adjacent digital
inputs. DI1 and DI2 have the same debounce time, while DI3
and DI4 are allowed to have another setting. If you change
the debounce time for a digital input, the same debounce
time is automatically assigned to the second input in the
same group.
Triggering the Fault Recorder through Digital Inputs
Check the Fault recorder boxes for digital inputs you wish to
use as triggers for the Fault recorder.
When an open-to-closed state transition is detected on the
digital input, the global “External Trigger” event is generated
in the meter. If the external triggers are enabled in the Fault
recorder (see
Configuring the Fault Recorder ), it triggers the
recorder to record waveforms or RMS data profile for the
event.
When a number of digital inputs linked to the Fault recorder
are operated at the same time, only the first triggers the
Fault recorder and logs a fault event into the Fault log file.
The next external fault event is not triggered until all digital
inputs linked to the Fault recorder are released. This does not
affect operations of the internal analog fault triggers that
work independently.
Notice that the “External Trigger” event can also be tested
through the control setpoints from the “Static Events” trigger
group to trigger another action on your selection.