GE EPM 9650/9800 manual High Speed Digital Input States

If the unit has regular hardware, RMS values are in units of squared secondary, with two bytes of fraction. That is, each count is 1/65536 of a squared volt. If the unit is supplied with 300V hard- ware, RMS values are in units of squared secondary, with 14 bits of fraction. That is, each count is 1/16384 of a squared volt. Units that have 300V hardware can be identified by the appropriate setting in the programmable settings.

For example:

Regular Hardware

VAN = 0x038B84000 = 14520.25 v2 secondary, or 120.5 v secondary

300V Hardware

VAN = 0x038B84000 = 58081 v2 secondary, or 241 v secondary

•The next byte holds eight bits representing the Delta of the High Speed Input States.

These RMS values report the maximum or minimum value during a surge or sag. A given reading is only valid in the record recorded when a surge or sag ends and only for the channel or channels on which surges or sags ended.

High Speed Digital Input States are in the following format:

		Table 6.11: High Speed Digital Input States
				Bits
7	6	5	4	3	2	1	0
HSI 8	HSI 7	HSI 6	HSI 5	HSI 4	HSI 3	HSI 2	HSI 1

A bit value of 1 means the input changed in the last cycle. A bit value of 0 means the input did not change.

•The next byte holds eight bits representing the Current States of the High Speed Inputs. The Current States of the High Speed Digital Inputs are in the following format:

	Table 6.12: Current States of the High Speed Digital Inputs
				Bits
7	6	5	4	3	2	1	0
HSI 8	HSI 7	HSI 6	HSI 5	HSI 4	HSI 3	HSI 2	HSI 1

A bit value of 1 means the input is open. A bit value of 0 means the input is closed.

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