D.22
SEL-749M Relay Instruction Manual Date Code 20080918
Modbus RTU Communications Protocol
Modbus Register Map
Trip Inhibit
00C1 (RW) TRIP INHIBIT
Bit 0 = CURRENT IMBALANC
Bit 1= JAM
Bit 2 = GROUND FAULT
Bit 3 = SHORT CIRCUIT
Bit 4 = UNDERCURRENT
Bit 5 = START INHIBIT
Bit 6 = PTC
Bit 7 = RTD
0 = N
1 = Y
0 255 1 293
Trip/Close Logic
00C2 (RW) MIN TRIP TIME s 0 4000 0.1 0.1 294
SELOGIC Enables
00C3 (RW) SELOGIC LATCHES 0 8 1 295
00C4 (RW) SV/TIMERS 0 8 1 296
Output Contacts
00C5 (RW) OUT101 FAIL-SAFE
0 = N
1 = Y
01 1 297
00C6 (RW) OUT102 FAIL-SAFE
0 = N
1 = Y
01 1 298
00C7 (RW) OUT103 FAIL-SAFE
0 = N
1 = Y
01 1 299
00C8 (RW) OUT401 FAIL-SAFE
0 = N
1 = Y
01 1 300
00C9 (RW) OUT402 FAIL-SAFE
0 = N
1 = Y
01 1 301
00CA (RW) OUT403 FAIL-SAFE
0 = N
1 = Y
01 1 302
00CB (RW) OUT404 FAIL-SAFE
0 = N
1 = Y
01 1 303
Event Report Settings
00CC (RW) EVENT LENGTH
0 = 15
1 = 64
cyc 0 1 1 304
00CD (RW) PREFAULT LENGTH cyc 1 59 1 1 305
00CE (RW) MSR RESOLUTION cyc 1 4 1 306
Table D.23 Modbus Register Map
a
(Sheet 12 of 26)
Address
b
(Hex) Name/Enums
c
Units
Range
Scale
Fa c tor
DeviceNet
Parameter
Number
Low High Step
Courtesy of NationalSwitchgear.com
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