GE GEK-106273L Instruction Manual page 180

13.4 WRITING SETTINGS
There are three steps to write a settings:
1. Executing a selection command using code 01 00H. (See command execution).
2. Changing the setting
3. Executing a confirmation command using code (See command execution).
For modifying a setting, we will use function 10H (PRESET MULTIPLE REGISTERS de MODBUS
FIELD LENGTH
Relay address 1 Byte
Function 1 Byte (10H)
Beginning 1 word (High byte – low byte)
No. of records 1 word (High byte – low byte)
No. of bytes 1 Byte
Value of the records (High byte – low byte)
CRC 1 word
Reply:
FIELD LENGTH
Relay address 1 Byte
Function 1 Byte (10H)
Beginning address 1 word
No. of records 1 word
CRC 1 word
Example:
In this example, we will modify the Identification setting of a relay that stores this information in position
0118H of its memory map. The relay identification is an ASCII text of 16 characters.
1. SETTING CHANGE SELECTION (LIKE A COMMAND)
Request:
ADDRESS FUNCTION
01 10
Reply:
ADDRESS FUNCTION
01 10
GEK-106273L
ANNEX 3 MODBUS MEMORY MAP
BEGINNING #REGS
0000 0001
BEGINNING #REGS
0000 00 01
MIF Digital Feeder Protection
#BYTES DATA0 CRC
02 0100 A7C0
CRC
01C9
®
)
13-5