B-6
D30 Line Distance Protection System
GE Multilin
B.2 MODBUS FUNCTION CODES
APPENDIX B
B
B.2.5 STORE MULTIPLE SETTINGS (FUNCTION CODE 10H)
This function code allows the master to modify the contents of a one or more consecutive setting registers in a relay. Setting
registers are 16-bit (two byte) values transmitted high order byte first. The maximum number of setting registers that can be
stored in a single packet is 60. The following table shows the format of the master and slave packets in Modbus RTU. Mod-
bus TCP/IP ADUs have a MBAP instead of slave address, and CRC is in another stack layer. The example shows a master
device storing the value 200 at memory map address 4051h, and the value 1 at memory map address 4052h to slave
device 11h (17 decimal).
B.2.6 EXCEPTION RESPONSES
Programming or operation errors usually happen because of illegal data in a packet. These errors result in an exception
response from the slave. The slave detecting one of these errors sends a response packet to the master with the high order
bit of the function code set to 1.
The following table shows the format of the master and slave packets in Modbus RTU. Modbus TCP/IP ADUs have a
MBAP instead of slave address, and CRC is in another stack layer. The example shows a master device sending the
unsupported function code 39h to slave device 11h.
Table B–8: MASTER AND SLAVE DEVICE PACKET TRANSMISSION EXAMPLE
MASTER TRANSMISSION
SLAVE RESPONSE
PACKET FORMAT
EXAMPLE (HEX)
PACKET FORMAT
EXAMPLE (HEX)
SLAVE ADDRESS
11
SLAVE ADDRESS
11
FUNCTION CODE
10
FUNCTION CODE
10
DATA STARTING ADDRESS - hi
40
DATA STARTING ADDRESS - hi
40
DATA STARTING ADDRESS - lo
51
DATA STARTING ADDRESS - lo
51
NUMBER OF SETTINGS - hi
00
NUMBER OF SETTINGS - hi
00
NUMBER OF SETTINGS - lo
02
NUMBER OF SETTINGS - lo
02
BYTE COUNT
04
CRC - lo
07
DATA #1 - high order byte
00
CRC - hi
64
DATA #1 - low order byte
C8
DATA #2 - high order byte
00
DATA #2 - low order byte
01
CRC - low order byte
12
CRC - high order byte
62
Table B–9: MASTER AND SLAVE DEVICE PACKET TRANSMISSION EXAMPLE
MASTER TRANSMISSION
SLAVE RESPONSE
PACKET FORMAT
EXAMPLE (HEX)
PACKET FORMAT
EXAMPLE (HEX)
SLAVE ADDRESS
11
SLAVE ADDRESS
11
FUNCTION CODE
39
FUNCTION CODE
B9
CRC - low order byte
CD
ERROR CODE
01
CRC - high order byte
F2
CRC - low order byte
93
CRC - high order byte
95
Summary of Contents for D30D00HCHF8AH6AM6BP8BX7A
Page 10: ...x D30 Line Distance Protection System GE Multilin TABLE OF CONTENTS...
Page 374: ...5 248 D30 Line Distance Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5...
Page 398: ...6 24 D30 Line Distance Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6...
Page 410: ...7 12 D30 Line Distance Protection System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7...
Page 444: ...9 24 D30 Line Distance Protection System GE Multilin 9 5 FAULT LOCATOR 9 THEORY OF OPERATION 9...
Page 576: ...B 102 D30 Line Distance Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B...
Page 616: ...D 10 D30 Line Distance Protection System GE Multilin D 1 IEC 60870 5 104 PROTOCOL APPENDIX D D...
Page 628: ...E 12 D30 Line Distance Protection System GE Multilin E 2 DNP POINT LISTS APPENDIX E E...
Page 636: ...F 8 D30 Line Distance Protection System GE Multilin F 3 WARRANTY APPENDIX F F...
Page 646: ...x D30 Line Distance Protection System GE Multilin INDEX...
