45
9. Modbus register map
Power XPert® release triP unit for MagnuM PXr circuit breakers
MN013015EN January 2022 www.eaton.com
Table 25. Modbus protection group data (continued).
func.
code
register
number
address
(hex)
setpoint name
r/w
Definition
3,4,6
Source ground CT ratio
R/W
Value = CT ratio
2401 = 1200:1
2001 = 1000:1
1601 = 800:1
801 = 400:1 (factory default)
401 = 200:1
201 = 100:1
101 = 50:1
51 = 25:1
21 = 10:1
9.4.3 Group 5 – Enhanced protection group
Table 26. Modbus enhanced protection group data.
func. code
register number
address (hex)
setpoint name
r/w
Definition (PXr 25 only)
6
3000
0x0BB7
Password
W
Factory default = 00000
3,4,6
3001
0x0BB8
Group 5 = enhanced protection R/W
0x05FF selects group 5
3,4,6
3002
0x0BB9
Over voltage action
R/W
0 = trip, 1 = alarm, 2 = OFF
3,4,6
3003
0x0BBA
Over voltage pickup
R/W
Valid range: 180 to 720 (volts)
3,4,6
3004
0x0BBB
Over voltage time
R/W
Valid range: 1 to 300 (seconds)
3,4,6
3005
0x0BBC
Under voltage action
R/W
0 = trip, 1 = alarm, 2 = OFF
3,4,6
3006
0x0BBD
Under voltage pickup
R/W
Valid range: 60 to 670 (volts)
3,4,6
3007
0x0BBE
Under voltage time
R/W
Valid range: 1 to 300 (seconds)
3,4,6
3008
0x0BBF
Voltage unbalance action
R/W
0 = trip, 1 = alarm, 2 = OFF
3,4,6
3009
0x0BC0
Voltage unbalance pickup
R/W
Valid range: 5 to 25 (as % of phase voltage)
3,4,6
3010
0x0BC1
Voltage unbalance time
R/W
Valid range: 1 to 300 (seconds)
3,4,6
3011
0x0BC2
Current unbalance action
R/W
0 = trip, 1 = alarm, 2 = OFF
3,4,6
3012
0x0BC3
Current unbalance pickup
R/W
Valid range: 5 to 25 (as % of phase voltage)
3,4,6
3013
0x0BC4
Current unbalance time
R/W
Valid range: 1 to 300 (seconds)
3,4,6
3014
0x0BC5
Reverse power action
R/W
0 = trip, 1 = alarm, 2 = OFF
3,4,6
3015
0x0BC6
Reverse power pickup
R/W
Valid range: 1 to 65500 (kW)
3,4,6
3016
0x0BC7
Reverse power time
R/W
Valid range: 1 to 300 (seconds)
9.5 Remote control commands
A set of three registers is reserved for sending commands
to the trip unit. These registers should be written together
using function code 16, with the data encoded as a 3-byte
command and it’s 1’s complement for a total of 6 bytes.
If the three registers are valid, the trip unit will begin to
execute the action. If the three registers are invalid, the trip
unit returns exception code 03.
Once the command is successfully acknowledged by trip
unit, it returns a normal function code 16 response to
Modbus client. Since it may take some time for trip unit
to take the action, the client may further determine if the
product completed the slave action function successfully
after the normal response by reading status.
Table 27. Modbus remote control command encoding.
register
number
address (hex)
trip unit remote control - register definition
2901
0x0B54
Command byte 1
Command byte 0
2902
0x0B55
1’s complement of byte 0
Command byte 2
2903
0x0B56
1’s complement of byte 2
1’s complement of byte 1
