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PQM Power Quality Meter
GE Power Management
TABLE OF CONTENTS
7. MODBUS
COMMUNICATIONS
7.1 OVERVIEW
7.1.1 MODBUS PROTOCOL.............................................................................. 7-1
7.1.2 ELECTRICAL INTERFACE ....................................................................... 7-1
7.1.3 DATA FORMAT & DATA RATE................................................................. 7-1
7.1.4 DATA PACKET FORMAT.......................................................................... 7-2
7.1.5 ERROR CHECKING.................................................................................. 7-2
7.1.6 CRC-16 ALGORITHM................................................................................ 7-3
7.1.7 TIMING ...................................................................................................... 7-3
7.2 MODBUS FUNCTIONS
7.2.1 PQM SUPPORTED MODBUS FUNCTIONS............................................. 7-4
7.2.2 FUNCTION CODES 03/04 – READ SETPOINTS/ACTUAL VALUES....... 7-4
7.2.3 FUNCTION CODE 05 - EXECUTE OPERATION...................................... 7-5
7.2.4 FUNCTION CODE 05 – BROADCAST COMMAND.................................. 7-6
7.2.5 FUNCTION CODE 06 – STORE SINGLE SETPOINT .............................. 7-7
7.2.6 FUNCTION CODE 07 – READ DEVICE STATUS .................................... 7-8
7.2.7 FUNCTION CODE 08 – LOOPBACK TEST.............................................. 7-9
7.2.8 FUNCTION CODE 16 – STORE MULTIPLE SETPOINTS...................... 7-10
7.2.9 FUNCTION CODE 16 - PERFORMING COMMANDS............................ 7-11
7.2.10 FUNCTION CODE 16 - BROADCAST COMMAND ................................ 7-12
7.2.11 ERROR RESPONSES............................................................................. 7-13
7.3 MODBUS MEMORY MAP
7.3.1 MEMORY MAP INFORMATION..............................................................7-14
7.3.2 USER-DEFINABLE MEMORY MAP........................................................ 7-14
7.3.3 PQM MEMORY MAP............................................................................... 7-15
7.3.4 MEMORY MAP DATA FORMATS........................................................... 7-55
7.3.5 ANALOG OUTPUT PARAMETER RANGE ............................................. 7-63
8. DNP COMMUNICATIONS
8.1 DNP 3.0 PROTOCOL
8.1.1 DEVICE PROFILE DOCUMENT ............................................................... 8-1
8.1.2 IMPLEMENTATION TABLE....................................................................... 8-3
8.1.3 DEFAULT VARIATIONS............................................................................ 8-4
8.1.4 INTERNAL INDICATION BITS .................................................................. 8-4
8.1.5 BINARY INPUT / BINARY INPUT CHANGE POINT LIST......................... 8-5
8.1.6 BINARY OUTPUT / CONTROL RELAY OUTPUT POINT LIST ................ 8-7
8.1.7 POINT LIST FOR ANALOG INPUT/OUTPUT CHANGE........................... 8-9
8.1.8 POINT LIST FOR COUNTERS................................................................ 8-14
9. COMMISSIONING
9.1 COMMISSIONING
A. APPLICATION NOTES
A.1 PQM APPLICATION NOTES
A.1.1 EVENT RECORDER .................................................................................A-1
A.1.2 INTERFACING USING HYPERTERMINAL...............................................A-4
A.1.3 PHASORS IMPLEMENTATION ................................................................A-7
A.1.4 TRIGGERED TRACE MEMORY RESOLUTION.......................................A-9
A.1.5 PULSE OUTPUT APPLICATION.............................................................A-11
A.1.6 DATA LOGGER IMPLEMENTATION......................................................A-12
A.1.7 READING LONG INTEGERS FROM MEMORY MAP ............................A-16
A.1.8 PULSE INPUT APPLICATION.................................................................A-18
A.1.9 PULSE TOTALIZER APPLICATION........................................................A-19
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