GE 350 User Manual

8-14 SR3 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE
FUNCTION CODE 42H CHAPTER 8: MODBUS FUNCTIONS
Function Code 42H
Modbus Implementation: (not a standard function)
3 Series relay Implementation: Read Settings Group
All protection functions for the 345 and 350 relays have two sets of settings - Group 1 and
Group 2. This function number is used to read the settings for each group. (This function
does not apply to the 339 relay.)
Example:
Response:
Function Code 43H
Modbus Implementation: (not a standard function)
3 Series relay Implementation: Write Settings Group
All protection functions for the 345 and 350 relays have two sets of settings - Group 1 and
Group 2. This function is used to write settings in a specific settings group. (This function
does not apply to the 339 relay.)
Example: (In the example there is a write setting procedure in the Group 1 (00), setting
address 0x09C1 and 2 bytes of data with value 0x0001.)
Field Name Hex
Slave Address FE
Function 42
Group Activation 00
Starting Address Hi 0A
Starting Address Lo B3
No. of Registers Hi 00
No. of Registers Lo 01
Field Name Hex
Slave Address FE
Function 42
Byte Count 02
Data Hi 00
Data Lo 00
Field Name Hex
Slave Address FE
Function 43
Group Activation 00
Starting Address Hi 09
Starting Address Lo C1
No. of Registers Hi 00
No. of Registers Lo 01

GE 350 Specifications

General

Brand	GE
Model	350
Category	Protection Device
Language	English