Sel 551 - Page 255

G.19
Date Code 20110408 Instruction Manual SEL-551 Relay
Modbus RTU Communications Protocol
Modbus RTU Communications Protocol
Bit 0 = 0 if all of
bits 8–15 are set
to 0
Bits 1–7 = 0
Bit 8 = 50P4
Bit 9 = 50P3
Bit 10 = 50P2
Bit 11 = 50P1
Bit 12 = 51Q2T
Bit 13 = 51Q1T
Bit 14 = 51Q2
Bit 15 = 51Q1
0084 Row 3
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
Bits 1–7 = 0
Bit 8 = 50Q2
Bit 9 = 50Q1
Bit 10 = 50G2
Bit 11 = 50G1
Bit 12 = 50N2
Bit 13 = 50N1
Bit 14 = 50P6
Bit 15 = 50P5
0085 Row 4
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
Bits 1–7 = 0
Bit 8 = CF
Bit 9 = CC
Bit 10 = OC
Bit 11 = IN2
Bit 12 = IN1
Bit 13 = 50C
Bit 14 = 50B
Table G.18 Modbus Map (Sheet 7 of 15)
Address
(Hex)
Field Units
Range
Scale
Factor
Low High Step