GE 745 TRANSFORMER MANAGEMENT RELAY

vi
745 Transformer Management Relay
GE Power Management
TABLE OF CONTENTS
7. SCHEME LOGIC
7.1 INTRODUCTION
7.1.1 DESCRIPTION .......................................................................................... 7-1
7.1.2 SETPOINTS............................................................................................... 7-1
7.1.3 MEASUREMENT UNITS ........................................................................... 7-1
7.1.4 TIME DELAYS ........................................................................................... 7-1
7.1.5 LED INDICATORS..................................................................................... 7-1
7.1.6 LOGIC........................................................................................................ 7-1
7.2 BLOCK DIAGRAMS
7.2.1 DIFFERENTIAL SCHEME LOGIC............................................................. 7-2
7.2.2 OVERCURRENT SCHEME LOGIC........................................................... 7-8
7.2.3 FREQUENCY LOGIC .............................................................................. 7-20
8. COMMUNICATIONS
8.1 OVERVIEW
8.1.1 PROTOCOLS ............................................................................................ 8-1
8.1.2 PHYSICAL LAYER .................................................................................... 8-1
8.2 MODBUS PROTOCOL
8.2.1 DESCRIPTION .......................................................................................... 8-2
8.2.2 GE POWER MANAGEMENT MODBUS PROTOCOL .............................. 8-2
8.2.3 ELECTRICAL INTERFACE ....................................................................... 8-2
8.2.4 DATA FRAME FORMAT AND RATE ........................................................ 8-2
8.2.5 DATA PACKET FORMAT.......................................................................... 8-3
8.2.6 CRC-16 ALGORITHM................................................................................ 8-4
8.2.7 MESSAGE TIMING.................................................................................... 8-4
8.2.8 SUPPORTED FUNCTION CODES ........................................................... 8-5
8.2.9 FUNCTION CODE 03H/04H: READ ACTUAL VALUES/SETPOINTS...... 8-6
8.2.10 FUNCTION CODE 05H: EXECUTE OPERATION .................................... 8-7
8.2.11 FUNCTION CODE 06H: STORE SINGLE SETPOINT.............................. 8-8
8.2.12 FUNCTION CODE 10H: STORE MULTIPLE SETPOINTS....................... 8-9
8.2.13 EXCEPTION RESPONSES..................................................................... 8-10
8.2.14 READING THE EVENT RECORDER...................................................... 8-11
8.2.15 READING TRACE MEMORY .................................................................. 8-11
8.2.16 ACCESSING DATA VIA THE USER MAP .............................................. 8-12
8.2.17 FUNCTION CODE SUBSTITUTIONS ..................................................... 8-15
a FUNCTION CODE 03H AND 04 SUBSTITUTIONS................................ 8-15
b FUNCTION CODE 05H SUBSTITUTION................................................ 8-15
c FUNCTION CODE 06H SUBSTITUTION................................................ 8-16
8.2.18 MEMORY MAP ORGANIZATION............................................................ 8-16
8.3 MODBUS MEMORY MAP
8.3.1 745 MEMORY MAP ................................................................................. 8-17
8.3.2 MEMORY MAP DATA FORMATS........................................................... 8-74
8.4 DNP COMMUNICATIONS
8.4.1 DEVICE PROFILE DOCUMENT ............................................................. 8-92
8.4.2 IMPLEMENATION TABLE....................................................................... 8-94
8.5 POINT LISTS
8.5.1 POINT LIST TABLES............................................................................... 8-96
9. 745 PC SOFTWARE
9.1 OVERVIEW
9.1.1 DESCRIPTION .......................................................................................... 9-1
9.1.2 HARDWARE & SOFTWARE REQUIREMENTS ....................................... 9-2
9.1.3 MENU SUMMARY..................................................................................... 9-2