G.17
Date Code 20110408 Instruction Manual SEL-551 Relay
Modbus RTU Communications Protocol
Modbus RTU Communications Protocol
Instantaneous Metering
0068 Inst. current
phase A
b
Amps 0 65535 1 1
0069 Inst. current
phase A angle
b
Degrees 0 36000 1 0.01
006A Inst. current phase B
b
Amps 0 65535 1 1
006B Inst. current phase B
angle
b
Degrees 0 36000 1 0.01
006C Inst. current phase C
b
Amps 0 65535 1 1
006D Inst. current phase C
angle
b
Degrees 0 36000 1 0.01
006E Inst. neutral current
b
Amps 0 65535 1 1
006F Inst. neutral current
angle
b
Degrees 0 36000 1 0.01
0070 Inst. residual current
b
Amps 0 65535 1 1
0071 Inst. residual current
angle
b
Degrees 0 36000 1 0.01
0072 Inst. negative-
sequence current
b
Amps 0 65535 1 1
0073 Inst. neg.-seq.
current angle
b
Degrees 0 36000 1 0.01
0074 Reserved
0075 Reserved
Relay Time and Date
0076 (RW)
(see Note 2)
Time
b
ss 0 59 1 1
0077 (RW)
b
mm 0 59 1 1
0078 (RW)
b
hh 0 23 1 1
0079 (RW) Date
b
dd 1 31 1 1
007A (RW)
b
mm 1 12 1 1
007B (RW)
b
yyyy 1992 2999 1 1
007C–007F Reserved
Relay Word
0080 Targets
Bit 0 = 1 if any of
bits 8–15 are set
to 1
Bit 0 = 0 if any of
bits 8–15 are set
to 0
Bits 1–7 = 0
Bit 8 = LO
Bit 9 = RS
Bit 10 = Phase N
51/50
Table G.18 Modbus Map (Sheet 5 of 15)
Address
(Hex)
Field Units
Range
Scale
Factor
Low High Step
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