GE EPM 9650/9800 manual Energy Preset Block, 97 12-bit RTU Block

8.96: Energy Preset Block (44545-44549)

Description: This block is for EPM 9800 Only. Energy readings can be preset by GE Communicator EXT 3.0 software.

Preset Energy Value: 4 Registers, 8 bytes. These registers hold the energy readings that will be used by the software for certain Energy Applications.

Preset Energy Selection / Status: 1 Register, 2 bytes. This register indicates which energy is to be preset by the software.

8.97: 12-bit RTU Block (53249-53348)

Description: Some older versions of RTU can only read 12-bit data. The EPM meter prepares some readings in 12-bit format in this block so that the reading can be processed.

Sanity Register - 1 register. This register indicates that status of the meter. A normally functioning meter reports that value 0x00000, or 0. Any non-zero value indicates that the unit is operating improperly.

Current, Voltage, W, VAR - 1 register, 2 bytes.

Range	+ 5 A / 0 A, + 150 V / 0 V, + 1500 W, VAR / - 1500 W, VAR
Unit	5/2048 A, 150/2048 V, 1500/2048 W, VAR

Each register contains a 16-bit integer. Positive values have the most significant bit clear, and have the same magnitude as an unsigned integer. Negative values have the most significant bit set. The magnitude of a negative value is found by complimenting (inverting) all of the bits and adding 1.

The 16-bit integers have been constrained to the bounds of a signed 12-bit integer, +2047 through - 2048.

Energy - 2 registers, 4 bytes.

Range	+99,999,999 / 0 or 0 / -99,999,999 kWh, kVARh
Unit	1 kWh, kVARh

Each pair of registers represents an Energy counter in primary. Each register contains a value from 0 to 9,999 (0x00000 - 0x0270F), representing 4 digits of an Energy counter. The first register is in units of 10's of MegaWatthour or MegaVARhour. The second register is in units of kiloWatthour or kiloVARhour. Combined, the pair of registers report up to 100 GWh primary of energy.

Frequency - 1 register, 2 bytes.

Range	75	Hz / 45 Hz
Unit	30	/ 4096 Hz

This register contains a 16-bit unsigned integer. The 16-bit integer has been constrained to the bounds of an unsigned 12-bit integer, 4095 to 0. The Frequency represented by this register is offset by 45 Hz

Energy Reset - This register, when written with any value, causes all Energy Values to be cleared.

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