Moxa Technologies CP-168U - Manual (Page 62)

3-46 Smartio CP-168U User’s Manual
NOTE Up to now you have completed the configuration for CP-134U Series board. You might skip this step
and go directly to step 4 if you need not change any setting or configure any board.
4. Press F10 to save the modifications and exit the SETUP program.
Legends
Some noticeable fields and functions are explained below.
Port number
This is actually the port ID of each port. The application software will refer to the port by
its port number (ID). A duplicated port number is not allowed. That is, each MOXA serial
port is referred to as port number in terms of serial programming.
You may map the port number range to the one you prefer between 0 and 255, as long as
no port number overlapping condition or port number undefined condition occurs.
Generally, you should take the convenience of programming into consideration when
specifying the port numbers for the board.
TxD buffer size
The transmission (output) buffer allocated in the system for each port.