Execute Operation (Function Code 05H; Store Single Setting (Function Code 06H - GE UR Series L90 Instruction Manual

Line current differential system
Table of Contents

Advertisement

B.2 MODBUS FUNCTION CODES
This function code allows the master to perform various operations in the relay. Available operations are shown in the Sum-
mary of operation codes table below.
The following table shows the format of the master and slave packets. The example shows a master device requesting the
slave device 11h (17 decimal) to perform a reset. The high and low code value bytes always have the values "FF" and "00"
respectively and are a remnant of the original Modbus definition of this function code.
B
Table B–4: MASTER AND SLAVE DEVICE PACKET TRANSMISSION EXAMPLE
MASTER TRANSMISSION
PACKET FORMAT
SLAVE ADDRESS
FUNCTION CODE
OPERATION CODE - high
OPERATION CODE - low
CODE VALUE - high
CODE VALUE - low
CRC - low
CRC - high
Table B–5: SUMMARY OF OPERATION CODES FOR FUNCTION 05H
OPERATION
DEFINITION
CODE (HEX)
0000
NO OPERATION
0001
RESET
0005
CLEAR EVENT RECORDS
0006
CLEAR OSCILLOGRAPHY
1000 to 103F
VIRTUAL IN 1 to 64 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 - high
DATA STARTING ADDRESS - low
DATA - high
DATA - low
CRC - low
CRC - high
B-4
B.2.3 EXECUTE OPERATION (FUNCTION CODE 05H)
SLAVE RESPONSE
EXAMPLE (HEX)
PACKET FORMAT
11
SLAVE ADDRESS
05
FUNCTION CODE
00
OPERATION CODE - high
01
OPERATION CODE - low
FF
CODE VALUE - high
00
CODE VALUE - low
DF
CRC - low
6A
CRC - high
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 64 either "ON" or "OFF".
B.2.4 STORE SINGLE SETTING (FUNCTION CODE 06H)
SLAVE RESPONSE
EXAMPLE (HEX)
PACKET FORMAT
11
SLAVE ADDRESS
06
FUNCTION CODE
40
DATA STARTING ADDRESS - high
51
DATA STARTING ADDRESS - low
00
DATA - high
C8
DATA - low
CE
CRC - low
DD
CRC - high
L90 Line Current Differential System
APPENDIX B
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
menu
GE Multilin

Advertisement

Table of Contents
loading

Table of Contents