Basic Principles of Serial Data Transmission
2.6 Data Transmission with the ASCII Driver
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
64 Manual, 09/2008, A5E02191071-01
2.6.3 Receiving data with the ASCII driver
Receiving data with ASCII driver
For data transmission using the ASCII driver you can choose between three different end
criteria for data receipt. The end criterion defines when a complete message frame is
received. The possible end criteria are as follows:
● Expiration of the character delay time
The message frame has neither a fixed length nor a defined end-of-text character; the
end of a message frame is defined by a pause on the line (expiration of character delay
time).
● Receipt of the end-of-text character(s)
The end of the message frame is marked by one or two defined end-of-text characters.
● Receipt of fixed number of characters
The length of the receive message frames is always identical.
Code transparency
The code transparency of the procedure depends on the choice of the assigned end criterion
and the flow control:
● With one or two end-of-text characters
– Not code-transparent
● When end criterion is character delay time or fixed message frame length
– Code-transparent
● Code-transparent operation is not possible when the flow control XON/XOFF is used.
Code-transparent means that any character combinations can occur in the user data without
the end criterion being recognized.
该文档是极速PDF编辑器生成，
如果想去掉该提示,请访问并下载：
http://www.jisupdfeditor.com/
To Next Page
Loading...
