Exception Responses; B.2.5 10H: Store Multiple Settings - GE UR Series Instruction Manual
Line differential relay
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B.2 FUNCTION CODES
This function code allows the master to modify the contents of a one or more consecutive setting registers in a relay. Set-
ting 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. 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 dec).
B
Table B–7: MASTER AND SLAVE DEVICE PACKET TRANSMISSION EXAMPLE
MASTER TRANSMISSION
PACKET FORMAT
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS - hi
DATA STARTING ADDRESS - lo
NUMBER OF SETTINGS - hi
NUMBER OF SETTINGS - lo
BYTE COUNT
DATA #1 - high order byte
DATA #1 - low order byte
DATA #2 - high order byte
DATA #2 - low order byte
CRC - low order byte
CRC - high order byte
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. The example shows a master device sending the
unsupported function code 39h to slave device 11.
Table B–8: MASTER AND SLAVE DEVICE PACKET TRANSMISSION EXAMPLE
MASTER TRANSMISSION
PACKET FORMAT
SLAVE ADDRESS
FUNCTION CODE
CRC - low order byte
CRC - high order byte
B-6
SLAVE RESPONSE
EXAMPLE (HEX)
PACKET FORMAT
11
SLAVE ADDRESS
10
FUNCTION CODE
40
DATA STARTING ADDRESS - hi
51
DATA STARTING ADDRESS - lo
00
NUMBER OF SETTINGS - hi
02
NUMBER OF SETTINGS - lo
04
CRC - lo
00
CRC - hi
C8
00
01
12
62
SLAVE RESPONSE
EXAMPLE (HEX)
PACKET FORMAT
11
SLAVE ADDRESS
39
FUNCTION CODE
CD
ERROR CODE
F2
CRC - low order byte
CRC - high order byte
L90 Line Differential Relay
APPENDIX B
B.2.5 10H: STORE MULTIPLE SETTINGS
EXMAPLE (HEX)
B.2.6 EXCEPTION RESPONSES
EXAMPLE (HEX)
11
B9
01
93
95
GE Power Management
11
10
40
51
00
02
07
64
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