Eaton Power Xpert PXR 10, Руководство пользователя

Страница: 54 / 172

9 Modbus RTU – integrated Modbus port specification
9.1 Indication/configuration of the Modbus parameters
50
PXR Electronic trip unit 01/21 MN012005EN www.eaton.com
9.1 Indication/configuration of the Modbus parameters
The Power Xpert Protection Manager software and the Modbus
communication link can be used to display and configure the setpoints of the
Modbus module via USB commands on the LCD display.
The Modbus communication settings are stored in registers 404000 to
404003 and can be read by means of the function codes 03 or 04, as listed in
￫ table 24. The Modbus settings can be changed by writing these four
registers one after the other with function code 06. If the data written in
these registers are outside the range, the trip unit will return the exception
code 03.
The default settings of the PXR trip units are as follows:
• Address: 2
• Baud rate: 19,200 bit/s
• even parity
• 1 stop bit
Table 22: Modbus settings
Setting value Modbus
register number Data range
Slave ID 404000 001 - 247
Baud rate 404001 00: 9,600 bit/s
01: 19,200 bit/s
02: 38,400 bit/s
03: 57,600 bit/s
Parity 404002 00: none
01: odd
02: even
Stop bit 404003 00: 1 bit
01: 2 bits