Are these points coming in as discrete accumulators or from an IED?
Discrete accumulators sir.
Any digital input can be configured as an accumulator. They
can be specified as either Form A or Form C (KYZ) and can be mixed in with the
other digital points if desired. (ie. they don’t have to be clustered together
at the beginning or end of normal status inputs) You can also specify either 1
or 2 counts per cycle for Form C inputs.
When you click on the Digital Inputs block on the main
configuration page you will get a pop up window. Here you will see the counts
per cycle (only relevant for form c accum) and how many digital input points
you want in total (includes points for status and accumulators – for each form
c accum add 2 points)
On the next page you can name the point and select what type
ie. spare, status(default), Form A or Form C accumulator. Selecting a form c
accum will gray out the following point as it is now part of the form c accum.
You will also have to change the point after to spare as it will by default be
a status input.
Once points are selected to be accumulators they will be
treated differently inside the RTU.
I am not sure where you are encountering the EGU with regard to accumulators. The number of pulses that can be accumulated is dependent on the protocol but for DNP the RTU just takes the number of pulses and hands them over to the master as a binary number 0-65535 (assuming 16 bit accum) 2,147,438,647 for 32 bit.