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IM02601004E
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A MODBUS Communication
A.10. Registers 4611-6332 (Real-Time Measured Values)
See
Appendix B
for detailed listing.
A.11. Register 11000+ (Real-Time and Historic Meter Data)
See
Appendix B.
A.12. Types of Data
FLOATING-POINT (IEEE-754)
Power Xpert Meter makes extensive use of the IEEE-754 floating-point format for real-time
and historic data. The standard representation requires a 32-bit word. The first bit is the
sign bit, S, the next eight bits are the exponent bits, E, and the final 23 bits are the fraction
F:
S EEEEEEEE FFFFFFFFFFFFFFFFFFFFFFF
The value represented by the word may be determined as follows:
• If E=255 and F is nonzero, then V=NaN (“Not a number”)
• If E=255 and F is zero and S is 1, then V=-Infinity
• If E=255 and F is zero and S is 0, then V=Infinity
• If 0<E<255 then V=(-1)
S
* 2
(E-127)
* (1.F) where 1.F is intended to represent the binary
number created by prefixing F with an implicit leading 1 and a binary point.
• If E=0 and F is nonzero, then V=(-1)
S
* 2
(-126)
* (0.F). [un-normalized value]
ENERGY FORMAT (64-BIT)
Energies are represented in a 64-bit format that includes a multiplier (2
MantissaMultiplier
) for
scaling and engineering units (10
EngineeringUnits
) . If energy were merely kiloWatt-hours, the
MantissaMultiplier equals 0 and Engineering Units equal 3. For further system simplicity,
these should be constants such that the ModBus master does not need to repetitively read
them.
LIST OF TRIGGER EVENTS
Starting at Reigster 18620 is a list of the 20 ost recent triggered events.
32-bit EventID
Timestamp UTC/GMT)
Cause (see Register 4610 for definitions)
Param 1, Param 2, IEEE floating-point values that are related to the event-if applicable.)
EVENT LOG
Starting at Register 29000 is a list of the 20 most recent logs.
EventID (32 bit)
Timestamp (UTC/GMT)
Number of ASCII characters in logged ddescription (16 bit)
Logged Description (ADCII string of up to 150 characters)
Summary of Contents for Power Xpert PXM 4000
Page 1: ...User and Installation Manual IM02601004E Power Xpert PXM 4000 6000 8000 ...
Page 8: ...Page vi IM02601004E www eaton ...
Page 19: ...www eaton com IM02601004E Page 11 1 Introduction ...
Page 24: ...Page 16 IM02601004E www eaton ...
Page 36: ...Page 18 IM02601004E www eaton com 2 Quick Start Guide for the Meter Module ...
Page 45: ...www eaton com IM02601004E Page 37 3 Installation 3 8 MeterDimensions ...
Page 46: ...Page 38 IM02601004E www eaton 3 Installation Dimension Con t ...
Page 47: ...www eaton com IM02601004E Page 39 3 Installation Dimension Con t ...
Page 48: ...Page 40 IM02601004E www eaton 3 Installation Dimension Con t ...
Page 53: ...www eaton com IM02601004E Page 45 3 Installation ...
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Page 55: ...www eaton com IM02601004E Page 47 3 Installation ...
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Page 58: ...Page 50 IM02601004E www eaton 3 Installation ...
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Page 66: ...Page 58 IM02601004E www eaton 3 Installation ...
Page 75: ...www eaton com IM02601004E Page 67 4 Introduction to Web Server Screens ...
Page 76: ...Page 68 IM02601004E www eaton 4 Introduction to Web Server Screens ...
Page 86: ...Page 78 IM02601004E www eaton 5 Introduction to the Local Graphical Display ...
Page 108: ...Page 100 IM02601004E www eaton 6 Functions on the Web Server Pages ...
Page 128: ...Page 120 IM02601004E www eaton 7 Functions on the Graphical Display ...
Page 164: ...Page 156 IM02601004E www eaton 8 Setup on the Web Server Pages ...
Page 198: ...Page 190 IM02601004E www eaton A MODBUS Communication ...
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Page 252: ...Page 244 IM02601004E www eaton D Diagnostics ...
Page 254: ...Page 246 IM02601004E www eaton D Diagnostics ...