[Cause]
The DSR of the serial port has been closed.
[Countermeasure]
Confirms whether the serial port is set correctly. Confirm if the cable is broken. Confirms the state of the device connected to the serial port.
Loading fault information
The DSR of the serial port has been closed.
Confirms whether the serial port is set correctly. Confirm if the cable is broken. Confirms the state of the device connected to the serial port.