
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