Table 2- 17 Data Flow Control (Printer Driver); Table 2- 18 X27 (Rs 422/485) Interface (Ascii Driver) - Siemens Simatic S7-300 CP 341 User Manual

Data flow control
The table below contains a description of the parameters for data flow control.
Data flow control is not possible with the RS 485 interface. RTS/CTS data flow control is only
supported with the RS 232C interface.
Table 2- 17 Data flow control (printer driver)
Parameters
Data flow control
XON character
(Only for data flow control
with XON/XOFF.)
XOFF character
(Only for data flow control
with XON/XOFF.)
Wait for XON after XOFF
(wait time for CTS = ON)
(Only for data flow control
with XON/XOFF or
RTS/CTS.)
X27 (RS 422/485) interface
You will find a description of the parameters for the X27 (RS 422/485) interface in the table
below.
Table 2- 18 X27 (RS 422/485) interface (ASCII driver)
Parameters
Receive line initial state
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01
www.gkbpx.com
Description
Defines which data flow
control procedure is used.
Code for XON character
Code for XOFF character
Period of time for which the
CP 341 should wait for the
XON code or for CTS="ON"
of the communication partner
when sending.
Description
R(A)5V/R(B)0V: This initial
state supports BREAK
detection; it cannot be
deactivated.
R(A)0V/R(B)5V: This initial
state does not support break
detection.
Basic Principles of Serial Data Transmission
Range of values
None
XON/XOFF
RTS/CTS
For 7 data bits:
•
0 to 7FH (hex)
With 8 data bits:
•
0 to FFH (hex)
(Depending on whether you
set 7 or 8 data bits for the
character frame.)
For 7 data bits:
•
0 to 7FH (hex)
With 8 data bits:
•
0 to FFH (hex)
(Depending on whether you
set 7 or 8 data bits for the
character frame.)
Up to 655350 ms
in 10 ms increments
Range of values
R(A) 5V / R(B) 0V
R(A) 0V / R(B) 5V
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2.8 Configuration data
Default value
None
11 (DC1)
13 (DC3)
2000 ms
Default value
R(A) 5V / R(B) 0V
95