50
9 Available protection settings
PXR TRIP UNITS FOR POWER DEFENSE MOLDED CASE CIRCUIT BREAKERS MN012007EN June 2018 www.eaton.com
10.3.7 Date and time
Trip unit supports Modbus master read real-time clock information. Eight registers, starting
from register number 402921 are reserved for this information, as defined in 0. Detailed
information is listed in 0. User could set system time through function code 16.
Definition Modbus register number Modbus register address Data range
Month 402921 0x0B68 1-12
Day 402922 0x0B69 1-31
Year 402923 0x0B6A 2000-2099
Day of week 402924 0x0B6B 1=Sunday…7=Saturday
Hour 402925 0x0B6C 0-23
Minute 402926 0x0B6D 0-59
Second 402927 0x0B6E 0-59
1/100th second 402928 0x0B6F
10.3.8 Internal diagnostics
Trip unit support internal Modbus diagnostics to monitor internal Modbus port communica-
tion with function code 08. For different sub-function codes, diagnostics information is listed
below.
Sub-function code Data Action
0 Echo query
1 0000 remain the counters
00FF reset all counters
Restart communication
4 0000 Force listen
10 0000 Clear counters
11 0000 Modbus UART bus message count
12 0000 Modbus UART CRC error count
13 0000 Exception count
14 0000 Slave message count
15 0000 Slave no response count
16 0000 Slave NAK count
17 0000 Slave busy count
18 0000 Modbus UART over run error count
20 0000 Clear Modbus UART counters
23 0000 Modbus UART framing error count
24 0000 Modbus UART noise error count
25 0000 Modbus UART parity error count
26 0000 MCU1 firmware version
27 0000 MCU1 firmware reversion
28 0000 MCU1 firmware build
29 0000 MCU2 firmware version
30 0000 MCU2 firmware reversion
31 0000 MCU2 firmware build
32 0000 USB version
33 0000 USB reversion
34 0000 Reset block of registers
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