Siemens SIMATIC CP 440 Manual page 150

Technical Specifications
Technical Specifications of the ASCII Driver
The following table contains the technical specifications of the ASCII driver.
Table A-2 Technical Specifications of the ASCII Driver
Max. message frame
length
Parameters
The ASCII Driver with the Message Frame End Criterion "On Expiry of Character
Parameters
ASCII Driver with Message Frame End Criterion Using a Parameterizable End-of-Text
Parameters
ASCII Driver with Message Frame End Criterion Using the Configured Message
Parameters
A-4
ASCII driver
200 bytes
The following can be parameterized:
Transmission rate: 300, 600, 1200, 2400, 4800, 9600, 19200,
38400, 57600, 76800, 115200 bps
Character frame: 9, 10, 11 or 12 bits
Character delay time: 1 ms to 65535 ms in 1 ms steps
Flow control: none, XON/XOFF
XON/XOFF code (only when flow control = XON/XOFF)
Wait for XON to XOFF (waiting time for CTS=ON): 20 ms to
65535 ms in 10 ms steps
Number of message frames to be buffered: 1 to 10, use entire
buffer
Prevent overwriting: yes/no
End ID of a receive message frame:
– On expiry of character delay time
– On receipt of end character(s)
– On receipt of fixed number of characters
Delay Time"
No further parameters need to be set. The end of the message
frame is detected when the parameterized character delay time
expires.
Character
The following can also be parameterized:
Number of end-of-text characters: 1 and/or 2
Hex code for first/second end-of-text character
Frame Length
The following can also be parameterized:
Message frame length: 1 to 200 bytes
Point-to-point connection CP 440 Installation and Parameter Assignment
A5E00057742-02