Siemens SIMATIC CP 440 Manual page 74

Configuring and Parameterizing the CP 440
Data Flow Control
In the following table the parameters for data flow control are described. Data flow
control is only possible when "Full Duplex (RS 422) Four-Wire Mode Point to Point"
is set.
Table 5-7 Data Flow Control (ASCII Driver)
Parameter
Data Flow Control Defines the type of data flow
control to be used.
1
XON Code Code for XON
1
XOFF Code Code for XOFF
Wait for XON after Period of time for which the CP440
XOFF (Wait Time waits for the XON code or for
3
for CTS=ON) CTS="ON" of the communication
partner when sending.
1
Only in the case of XON/XOFF data flow control
2
Depends on whether you parameterize 7 or 8 data bits for the character frame (see Table 5-6).
3
Only in the case of XON/XOFF data flow control
Further Information
You will find more information on data flow control with XON/XOFF in
Section 2.2.2.
5-10
Description
20 to 65535 ms
in 10 ms increments
Point-to-point connection CP 440 Installation and Parameter Assignment
Value Range Default Value
None
XON/XOFF
2
7 data bits :
0 to 7FH (hex)
2
8 data bits :
0 to FFH (hex)
2
7 data bits :
0 to 7FH (hex)
2
8 data bits :
0 to FFH (hex)
None
11 (DC1)
13 (DC3)
20000 ms
A5E00057742-02