E.62
SEL-751 Relay Instruction Manual Date Code 20170927
Modbus RTU Communications
Communications Protocol
400DH (R) FIRMWARE BUILD NUM 16400 16400 0 na
400EH not used
400FH (R) PRODUCT SUPPORT BITS na
Bit 0 = 2nd IO Card installed
Bits 1–15 = Reserved
4010H (R/W) SETTINGS TIMEOUT ms 500 65535 750 na
4011H–4013H Reserved
c
4014H (R) CONFIGURED BIT 0 na
Bit 0 = Unit Configured
Bits 1–15 = Reserved
4015H (R) Reserved
c
4016H (R) ERROR REGISTER 0 65535 0 na
Bit 0–Bit 15 = Reserved
4017H (R) ERROR ADDRESS 0 65535 0 na
4018H–401FH (R) Reserved
c
a
All addresses in this table refer to the register addresses in the Modbus packet.
b
Registers labeled (R/W) are read-write registers. Registers labeled (W) are write-only registers. Registers Labeled (R) are read-only
registers.
c
Reserved addresses return 0.
d
Read this register only when the PT connection is DELTA.
e
Read this register only when the PT connection is WYE.
Table E.34 Modbus Register Map
a
(Sheet 38 of 38)
Modbus Register
Address
b
Name/Enums Units Min Max Default
Scale
Fac to r
DeviceNet
Parameter
Numbers
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