Function Code 05H: Execute Operation; Function Code 06H: Store Single Setting - GE C60 Instruction Manual

APPENDIX B
This function code allows the master to perform various operations in the relay. Available operations are in the table SUM-
MARY OF OPERATION CODES.
The following table shows the format of the master and slave packets. The example shows a master device requesting the
slave device 11H (17 dec) to perform a reset. The hi and lo CODE VALUE bytes always have the values 'FF' and '00'
respectively and are a remnant of the original Modbus
Table B–4: MASTER AND SLAVE DEVICE PACKET TRANSMISSION EXAMPLE
MASTER TRANSMISSION
PACKET FORMAT
SLAVE ADDRESS
FUNCTION CODE
OPERATION CODE - hi
OPERATION CODE - lo
CODE VALUE - hi
CODE VALUE - lo
CRC - lo
CRC - hi
Table B–5: SUMMARY OF OPERATION CODES (FUNCTION CODE 05H)
OPERATION DEFINITION
CODE (HEX)
0000 NO OPERATION
0001 RESET
0005 CLEAR EVENT RECORDS
0006 CLEAR OSCILLOGRAPHY
1000 to 101F VIRTUAL IN 1-32 ON/OFF
This function code allows the master to modify the contents of a single setting register in an relay. Setting registers are
always 16 bit (two byte) values transmitted high order byte first.
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 to slave device 11h (17 dec).
Table B–6: MASTER AND SLAVE DEVICE PACKET TRANSMISSION EXAMPLE
MASTER TRANSMISSION
PACKET FORMAT
SLAVE ADDRESS
FUNCTION CODE
DATA STARTING ADDRESS - hi
DATA STARTING ADDRESS - lo
DATA - hi
DATA - lo
CRC - lo
CRC - hi
GE Multilin
B.1.7 FUNCTION CODE 05H: EXECUTE OPERATION
®
definition of this function code.
SLAVE RESPONSE
EXAMPLE (HEX) PACKET FORMAT
11 SLAVE ADDRESS
05 FUNCTION CODE
00 OPERATION CODE - hi
01 OPERATION CODE - lo
FF CODE VALUE - hi
00 CODE VALUE - lo
DF CRC - lo
6A CRC - hi
DESCRIPTION
Does not do anything.
Performs the same function as the
Performs the same function as the
command.
Clears all oscillography records.
Sets the states of Virtual Inputs 1 to 32 either "ON" or "OFF".
B.1.8 FUNCTION CODE 06H: STORE SINGLE SETTING
SLAVE RESPONSE
EXAMPLE (HEX) PACKET FORMAT
11 SLAVE ADDRESS
06 FUNCTION CODE
40 DATA STARTING ADDRESS - hi
51 DATA STARTING ADDRESS - lo
00 DATA - hi
C8 DATA - lo
CE CRC - lo
DD CRC - hi
C60 Breaker Management Relay
0.1 FUNCTION CODES
EXAMPLE (HEX)
11
05
00
01
FF
00
DF
6A
faceplate
RESET key.
faceplate
CLEAR EVENT RECORDS
EXAMPLE (HEX)
11
06
40
51
00
C8
CE
DD
B
menu
B-5