Sel 551 - Page 260

G.24
SEL-551 Relay Instruction Manual Date Code 20110408
Modbus RTU Communications Protocol
Modbus RTU Communications Protocol
Bit 0 = 1 if any of
bits 8–15 are set
to 1
Bit 0 = 0 if all of
bits 8–15 are set
to 0
Bit 1–7 = 0
Bit 8 = LO
Bit 9 = RS
Bit 10 = Phase N
51/50
Bit 11 = Phase C
51/50
Bit 12 = Phase B
51/50
Bit 13 = Phase A
51/50
Bit 14 = Inst.
Bit 15 = 0
Event Reporting (see Note 4)
00B0 Number event
records
b
–12011
00B1 Event selection
b
–12011
00B2 Channel selection
b
–11811
00B3 1/4 cycle
c
–32767 32767 1 1
00B4 1/2 cycle
c
–32767 32767 1 1
00B5 3/4 cycle
c
–32767 32767 1 1
00B6 1 cycle
c
–32767 32767 1 1
00B7 1 1/4 cycle
c
–32767 32767 1 1
00B8 1 1/2 cycle
c
–32767 32767 1 1
00B9 1 3/4 cycle
c
–32767 32767 1 1
00BA 2 cycle
c
–32767 32767 1 1
00BB 2 1/4 cycle
c
–32767 32767 1 1
00BC 2 1/2 cycle
c
–32767 32767 1 1
00BD 2 3/4 cycle
c
–32767 32767 1 1
00BE 3 cycle
c
–32767 32767 1 1
00BF 3 1/4 cycle
c
–32767 32767 1 1
00C0 3 1/2 cycle
c
–32767 32767 1 1
00C1 3 3/4 cycle
c
–32767 32767 1 1
00C2 4 cycle
c
–32767 32767 1 1
00C3 4 1/4 cycle
c
–32767 32767 1 1
00C4 4 1/2 cycle
c
–32767 32767 1 1
00C5 4 3/4 cycle
c
–32767 32767 1 1
Table G.18 Modbus Map (Sheet 12 of 15)
Address
(Hex)
Field Units
Range
Scale
Factor
Low High Step