4
Baud rate
：
Serial port baud rate: optional range is 1200~115200bps and default is 9600bps. Please set
this parameter to be consistent with the device to which the serial port is connected.
Check Digit
：
It could choose none, odd, even and default is set as none. Please set this parameter to be
consistent with the device to which the serial port is connected.
Stop bit
：
It can choose stop bit 1 or stop bit 2. The default is set as stop bit 1. Please set this
parameter to be consistent with the device to which the serial port is connected.
Receive character interval
：
When receiving message the frame interval detection time can be chose from 1.5t to 200t.
Default is 3.5t. (T is the transmission time of a single character, and it is related with baud
rate). In general, there is no need to change this parameter.
Timeout processing
：
The gateway serves as the Modbus RTU/ASCII slave. And it is the
time interval between receiving a message from the master and sending a reply message.
This is related to the master performance.
