GE EPM 9650/9800 manual Table of Contents

Table of Contents

Chapter 1: Modbus Protocol Overview
1.1: Introduction	. .	. . . . . . . 1-1
1.2: Communication Packets	. .	. . . . . . . 1-1
1.3: Slave Address and Broadcast Request	. . . . . . . . . 1-1
1.4: Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4.1: Function Code 03—Read Holding Registers	. .	. . . . . . . 1-2
1.4.2: Function Code 06—Preset Single Register	. .	. . . . . . . 1-3
1.4.3: Function Code 10—Preset Multiple Registers	. .	. . . . . . . 1-3
1.4.4: Data Starting Address	. .	. . . . . . . 1-3
1.5: CRC (Error Checksum) Algorithm	. .	. . . . . . . 1-4
1.6: Dead Time	. .	. . . . . . . 1-5
1.7: Exception Response (Error Codes)	. .	. . . . . . . 1-5
1.8: Modbus Extensions	. . . . . . . . . 1-6
1.8.1: Function Code 23H - Read Holding Registers Multiple Times		. . . . . . . 1-7
1.8.2: Function Code 42H - Encapsulated DNP for LAN/WAN	. . . . . . . . . 1-8
Chapter 2: EPM Modbus Register Map
Device Identification Block	. .	. . . . . . . 2-1
Real Time Block	. .	. . . . . . . 2-1
1 Cycle Block	. .	. . . . . . . 2-1
Tenth Second Block	. .	. . . . . . . 2-2
One Second Block	. .	. . . . . . . 2-2
Thermal Average Block	. .	. . . . . . . 2-3
Maximum Block	. .	. . . . . . . 2-4
Minimum Block	. . . . . . . . . 2-6
Maximum Time Stamp Block . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Minimum Time Stamp Block	. . . . . . . . 2-10
Energy Block (Secondary)	. . . . . . . . 2-12
Harmonic Magnitude Block	. . . . . . . . 2-12
Harmonic Phase Block	. . . . . . . . 2-36
THD/K-Factor Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Harmonic Time Stamp Block	. . . . . . . . 2-59
Phase Angle Block	. . . . . . . . 2-60
Block Window Average Block . . . . . . . . . . . . . . . . . . . . . . . . . 2-60
Rolling Window/Predictive Rolling Window Block	.	. . . . . . . 2-61

Limit Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62 Digital Input Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62

Primary Accumulation Block . . . .	. . . . . . . . . . . . . . . . .	. . . . 2-63
Time of Use Period Time Stamp Block	. . . . . . . . . . . . . . . . .	. . . . 2-64
Time of Use Frozen Register 1 Block .	. . . . . . . . . . . . . . . . .	. . . . 2-65
Time of Use Frozen Register 2 Block .	. . . . . . . . . . . . . . . . .	. . . . 2-66
Time of Use Frozen Register 3 Block .	. . . . . . . . . . . . . . . . .	. . . . 2-66
Time of Use Frozen Register 4 Block .	. . . . . . . . . . . . . . . . .	. . . . 2-67

iii