JRC Alphatron Marine AlphaTurn, Инструкция по установке и эксплуатации

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2.5.2.5 Serial Port Monitor (SERIAL MON)
It is possible to show serial data transmitted and received over the serial ports.
Usually, NMEA signals should be viewed as ASCII data and Modbus data should be viewed as HEX data. Received data
as well as sent data can be viewed (but not simultaneously). Select the appropriate button (Tx/Rx). For NMEA, Rx is
normally used.
Figure 37: Serial Port 1 Figure 38: Serial Port 3
1. In the MENU, touch the ADV SET button.
The PASSWORD screen appears.
2. Key in the password and confirm with the
√
button.
The ADVANCED SETTINGS MENU appears.
3. Touch the SERIAL MON button.
The SERIAL PORT MONITOR 1 screen appears, see Figure 37: Serial Port 1 on page 41.
4. Touch the < or > buttons to select next port, see Figure 38: Serial Port 3 on page 41.
5. Touch the Rx/Tx buttons to show the Received/Transmitted data.
6. Touch the ASCII/HEX buttons to show the characters in ASCII code or in HEX values.
7. Touch the
←
button to return to ADVANCED SETTINGS MENU.
Note All serial ports are configured the same way, the Serial Port screen has the following options:
• Baud rate: - Baud rate is a setting for Modbus devices, NMEA talkers, and other devices. It is also known
as symbol rate and modulation rate. The term roughly means the speed that data is transmitted. It is a
derived value based on the number of symbols transmitted per second. Valid values are: 1200, 2400,
4800, 9600, 19200, 38400, 57600 or 115200. The default value for NMEA is 4800. The default value for
Modbus communication is 19200.
• Data bits: - The numbers of data bits in each character can be 7 (for true ASCII), 8 (for any kind of data,
as this matches the size of a byte) 8 data bits are almost universally used in newer applications. 7 bits
is only used on special occasions. Valid values are: 7 or 8. The default value for NMEA and Modbus
communication is 8.
• Stop bits: - Stop bits sent at the end of every character allow the receiving signal hardware to detect the
end of a character and to resynchronize with the character stream. Electronic devices usually use one
stop bit. Valid values are: 1 or 2. The default value for NMEA and Modbus communication is 1.
41 | Operation