Schweitzer Engineering Laboratories SEL-749M - Page 270

D.36
SEL-749M Relay Instruction Manual Date Code 20080918
Modbus RTU Communications Protocol
Modbus Register Map
4016 (R) ERROR REGISTER
Bit 0 = Settings Read Error
Bit 1 = Settings Write Error
Bit 2 = Settings Update Error
Bit 3 = Settings Resource Error
Bit 4 = Settings Locked
Bit 5 = Group Settings Error
Bit 6 = Global Settings Error
Bit 7 = Logic Settings Error
Bit 8 = Report Settings Error
Bit 9 = Front Panel Settings Error
Bit 10 = Memory Not Available
Bit 11 = Settings Prep Error
Bit 12 = Settings Changes Disabled
Bit 13 = Memory Diag Error
Bit 14–15 = Reserved
0 65535
4017–401F (R) Reserved 0 0
a
All addresses in this table refer to the register addresses in the Modbus packet.
b
Registers labeled (RW) are read-write registers. Registers labeled (W) are write-only registers. Registers labeled (R) are read-only
registers.
c
Reserved addresses return 0.
Table D.23 Modbus Register Map
a
(Sheet 26 of 26)
Address
b
(Hex) Name/Enums
c
Units
Range
Scale
Fa c tor
DeviceNet
Parameter
Number
Low High Step
Courtesy of NationalSwitchgear.com