Serial Communication Troubleshooting - Sena PS100 User Manual

The HelloDevice Pro
Series is configured to
reject IP address of the
PC
TCP connection with
the other host is
established already
C.7 Serial communication troubleshooting
Problem Cause
Serial data are not Too large inter-character
transferred by timeout
TCP/IP immediately
Cannot Invalid serial port
communicate with configuration
the HelloDevice Pro
Series
Only serial port#2 Serial console is used
of PS400 is not
working (PS400
only)
Invalid data Invalid serial port
transferred configuration
RS485 mode is not Invalid serial port
working configuration
Terminator resistor is not
attached
RS422 mode is not Invalid serial port
working configuration
Terminator resistor is not
attached
Change the remote host access control parameter using serial
or remote console to allow the IP address of the PC
Close established TCP connection or connect later
Action
Set inter-character timeout with smaller value
Check if serial port configuration of the HelloDevice Pro Series
are the same with that of the serial device
Serial port#2 of the PS400 is used commonly for both data port
and serial console port. While serial console is used, data
transfer through serial port#2 is disabled. Close serial console to
use serial port#2 for data transfer.
Check if serial port configuration is correct.
Check if serial port is set to RS485 Echo or RS485 Non-echo
mode.
The HelloDevice Pro Series has no terminator resistor inside for
RS485 communication. Please attach a 120 Ω resistor between
Data+ and Data- pins.
Check if serial port is set to RS422 mode.
The HelloDevice Pro Series has no terminator resistor inside for
RS422 communication. Please attach 120 Ω resistors between
Tx+, Tx- and between Rx+, Rx- pins.
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