Doc# E166703 B-3
B: Modbus Map Overview
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
The sign of the mantissa (and therefore the number) is 1, which represents a
negative value.
The Exponent is 10001001 (binary) or 137 decimal.
The Exponent is a value in excess 127. So, the Exponent value is 10.
The Mantissa is 11000010001110110111001 binary.
With the implied leading 1, the Mantissa is (1).611DB9 (hex).
The Floating Point Representation is therefore -1.75871956 times 2 to the 10.
Decimal equivalent: -1800.929
NOTES:
• Exponent = the whole number before the decimal point.
• Mantissa = the positive fraction after the decimal point.
B.5: Important Note Concerning the MP200 Unit's Modbus Map
In depicting Modbus registers (Addresses), the MP200 unit's Modbus map uses Hold-
ing Registers only.
B.5.1: Hex Representation
The representation shown in the table below is used by developers of Modbus drivers
and libraries, SEL 2020/2030 programmers and Firmware Developers. The MP200
unit's Modbus map also uses this representation.
Hex Description
0008 - 000F MP200 Unit Serial
Number
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