Eaton Power Xpert Release PXR 20 - Remote Control Commands

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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