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CHAPTER 4: CONFIGURING THE EPM 9800 METER
GENERAL SETTINGS
• Data Size
From the pull-down menu, select the Number of Bytes you want
to represent the Data Point.
• Unit
If the polled value is viewed as an integer, the Unit field tells you
where to place the decimal point.
Example: If you select .01, a polling value 1234 would be
interpreted as 12.34.
Example: If you select 100, a polling value 1234 would be
interpreted as 123400.
• Pri/Sec
The meter normally computes values in secondary units. Where
applicable, you may select primary or secondary. If Primary is
selected, the value is multiplied by the appropriate CT and/or PT
values.
• Sign/Abs
Where appropriate, you may have the option of having the data
point computed as a signed or absolute value.
• Byte Order
For most of the Data Points, the user can select the polling order
of the number of bytes selected by the Data Size field. Example:
For a four-byte Data Point, the bytes can be arranged in any
order for polling purposes.
• Display/Modulo/Offset
Depending on the Data Point selected, you may select one or
more additional options with the appropriate subselections.
Display: For certain Data Points, interpretation and display
options are offered.
Example: For An Angle values, you can represent and display as 0
to 360 degrees or -180 to +180 degrees, etc. Selections will
appear in a pull-down menu for the associated point.
Modulo: Certain values are cumulative and can roll over and start
recounting from zero. For those values, where required, you can
enter a point at which the rollover will occur.
Offset: Where allowed, you can enter a value (offset) which will be
added to the data point when it is computed.
Table 4–2: Custom Modbus Readings
Line
Point
Description
34
0
One Second Phase to Neutral Volts: Volts AN
34
1
One Second Phase to Neutral Volts: Volts BN
34
2
One Second Phase to Neutral Volts: Volts CN
35
0
One Second Auxiliary Volts: V Aux
36
0
One Second (A, B, C): 1A
36
1
One Second (A, B, C): 1B
36
2
One Second (A, B, C): 1C
GE COMMUNICATOR EXT – INSTRUCTION MANUAL
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