
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Modbus RTU function codes
In addition to the Modbus RTU function codes of the COM16 module, described on
, the following definitions of the Status Regis-
ter, Control Bits, Extra Flags, Basic Types and Exception Status Bits apply to the COM16 module.
Status Register
The Status Register provides WL status information to the Modbus RTU master. The Status Register is accessed using the following func-
tions:
- 02 Read Input Status Discretes
- 04 Read Input Registers
Bit number
WL
0, 1
Circuit breaker position
00 = disconnected position
01 = connected position
10 = test position
11 = circuit breaker not present
2, 3
Circuit breaker status
00 = not ready
01 = circuit breaker open
10 = circuit breaker closed
11 = circuit breaker tripped
4
Circuit Breaker is "Ready-to-close"
5
Undervoltage release
6
Closing spring charged
7
Overload warning
8
Setpoints active
9
Warning(s) active
10
Modbus RTU "Write enable" input active
11
User input
12, 13, 14
Trip
000 = no trip
001 = overload trip
010 = instantaneous short-circuit trip
011 = short time delayed short-circuit trip
100 = ground-fault trip
101 = trip caused by extended protective function
110 = N conductor trip
15
Load shedding
Summary of Contents for UL 489
Page 36: ...5 21 Frame size II 3000 A Frame size III 1 Holes 14 mm 0720 1 0721_nu ...
Page 63: ...7 2 Horizontal connectors 0733_nu top view ...
Page 64: ...7 3 Rear vertical connectors 0734_nu top view rear view ...
Page 65: ...7 4 Front connectors 0736_nu front view top view ...
Page 66: ...7 5 Front connectors and pressure wire terminals 0737_nu top view front view ...
Page 67: ...7 6 7 2 Frame size II fixed mounted version 0494 3_nu ...
Page 68: ...7 7 Class C always 0494 5_nu top view rear view ...
Page 69: ...7 8 2500 0738_nu LH side view front view ...
Page 71: ...7 10 7 4 Frame size III fixed mounted version 0495 1_nu LH side view ...
Page 72: ...7 11 0495 2_nu top view top view ...
Page 73: ...7 12 0495 3_nu top view rear view ...
Page 75: ...7 14 7 5 Door cut outs fixed mounted circuit breaker Frame size I 0735_nu ...
Page 76: ...7 15 Frame size II III 0496_nu ...
Page 77: ...7 16 7 6 Frame size I draw out version 0745_nu ...
Page 78: ...7 17 0746_nu rear view top view ...
Page 79: ...7 18 0747_nu bottom view ...
Page 80: ...7 19 0748_nu ...
Page 81: ...7 20 0749_nu ...
Page 82: ...7 21 7 7 Frame size II draw out version 0490 1_ul ...
Page 86: ...7 25 7 8 Frame size III draw out version ...
Page 87: ...7 26 ...
Page 88: ...7 27 ...
Page 89: ...7 28 7 9 Door cut outs for draw out circuit breakers Frame size I 0750_nu ...
Page 91: ...7 30 7 11 External sensor for neutral conductor WLNCT2 ...
Page 92: ...7 31 WLNCT3 ...
Page 107: ...9 5 I tripping Ground fault tripping ...
Page 351: ......