E.68
SEL-751A Relay Instruction Manual Date Code 20100129
Modbus RTU Communications
Modbus Register Map
Trip/Warn Data
The Trip and Warn Status registers bits are “sticky” (once set they are not cleared until target reset is issued from any interface) when
a trip event occurs.
1780 (R) TRIP STATUS LO 0 65535 0 1 1880
Bit 0 = PHASE A1 50
Bit 1 = PHASE B1 50
Bit 2 = PHASE C1 50
Bit 3 = PHASE 50P1
Bit 4 = GROUND 50G1
Bit 5 = NEUTRAL 50N1
Bit 6 = NEG SEQ 50Q1
Bit 7 = PHASE A 51
Bit 8 = PHASE B 51
Bit 9 = PHASE C 51
Bit 10 = PHASE 51P1
Bit 11 = GROUND 51G1
Bit 12 = NEUTRAL 51N1
Bit 13 = NEG SEQ 51Q
Bit 14 = UNDERVOLT 27P1
Bit 15 = OVERVOLT 59P1
1781 (R) TRIP STATUS HI 0 65535 0 1 1881
Bit 0 = POWER FACTOR 55
Bit 1 = FREQUENCY 81D1
Bit 2 = FREQUENCY 81D2
Bit 3 = RTD-OTHER
Bit 4 = RTD-AMBIENT
Bit 5 = RTD-WIND BEAR
Bit 6 = RTD ERROR
Bit 7 = POWER ELEMENTS
Bit 8 = COMM IDLE
Bit 9 = COMM LOSS
Bit 10 = REMOTE TRIP
Bit 11 = COMM FAULT
Bit 12 = CONFIG FAULT
Bit 13 = RESERVED
Bit 14 = RESERVED
Bit 15 = BREAKER FAIL
1782 (R) WARN STATUS LO 0 65535 0 1 1882
Bit 0 = PHASE 50P2
Bit 1 = PHASE 50P3
Bit 2 = PHASE 50P4
Bit 3 = GROUND 50G2
Bit 4 = GROUND 50G3
Bit 5 = GROUND 50G4
Bit 6 = NEUTRAL 50N2
Bit 7 = NEUTRAL 50N3
Bit 8 = NEUTRAL 50N4
Bit 9 = NEG SEQ 50Q2
Bit 10 = NEG SEQ 50Q3
Bit 11 = NEG SEQ 50Q4
Bit 12 = PHASE 51P2
Bit 13 = GROUND 51G2
Bit 14 = NEUTRAL 51N2
Bit 15 = RESERVED
Table E.32 Modbus Register Map
a
(Sheet 43 of 56)
Modbus Register
Address
b
Name/Enums Units Min Max Default
Scale
Facto r
DeviceNet
Parameter
Numbers
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