GE 239 Instruction Manual page 6

7. COMMUNICATIONS
8. TESTING
ii
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TABLE OF CONTENTS
6.7 239 FIRMWARE UPGRADE ..............................................6-9
6.8 USING 239PC ..................................................................6-12
7.1 MODBUS PROTOCOL ......................................................7-1
7.2 ELECTRICAL INTERFACE................................................7-1
7.3 DATA FRAME FORMAT / DATA RATE.............................7-1
7.4 DATA PACKET FORMAT ..................................................7-2
7.5 ERROR CHECKING ..........................................................7-2
7.6 TIMING...............................................................................7-4
7.7 239 SUPPORTED MODBUS FUNCTIONS .......................7-4
7.8 03/04: READ SETPOINTS / ACTUAL VALUES.................7-4
7.9 05: EXECUTE OPERATION ..............................................7-5
7.10 06: STORE SINGLE SETPOINT........................................7-6
7.11 07: READ DEVICE STATUS..............................................7-7
7.12 08: LOOPBACK TEST .......................................................7-8
7.13 16: STORE MULTIPLE SETPOINTS .................................7-9
7.14 16: PERFORMING COMMANDS.....................................7-10
7.15 ERROR RESPONSES .....................................................7-11
7.16 MEMORY MAP INFORMATION ......................................7-11
7.17 USER DEFINABLE MEMORY MAP ................................7-11
7.18 239 MEMORY MAP .........................................................7-13
7.19 MEMORY MAP DATA FORMATS ...................................7-31
8.1 PRIMARY INJECTION TESTING ......................................8-1
8.2 SECONDARY INJECTION TESTING ................................8-1
8.3 PHASE CURRENT ACCURACY .......................................8-2
8.4 PHASE CURRENT OVERLOAD........................................8-3
8.5 PHASE UNBALANCE ALARM...........................................8-3
8.6 GROUND CURRENT ACCURACY....................................8-5
8.7 GROUND ALARM AND TRIP ............................................8-5
8.8 SWITCH INPUT .................................................................8-6
8.9 ANALOG OUTPUT.............................................................8-6
8.10 THERMISTOR ALARM ......................................................8-7
8.11 RTD MEASUREMENT .......................................................8-7
8.12 POWER FAILURE / NON-VOLATILE MEMORY ...............8-7
8.13 ROUTINE MAINTENANCE VERIFICATION......................8-8
239 Motor Protection Relay GE Multilin