Table 2- 7 Receive Buffer On Cp (3964(R) Procedure); Table 2- 8 X27 (Rs 422) Interface (3964(R) Procedure) - Siemens Simatic S7-300 CP 341 User Manual

Extended error display at the receive FB
Table 2- 7 Receive Buffer on CP (3964(R) Procedure)
Parameters
Extended error display at the
receive FB
X27 (RS 422) interface
You will find a description of the parameters for the X27 (RS 422) interface in the table
below. RS 485 operation is not possible in conjunction with the 3964(R) procedure.
Table 2- 8 X27 (RS 422) interface (3964(R) procedure)
Parameters Description
Receive line initial None: This setting only makes sense with bus-
state capable special drivers.
R(A) 5V / R(B) 0V: Break detection is possible in
this initial state.
R(A) 0V / R(B) 5V: Break detection is not
possible in this initial state.
(also see the following figure)
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01
www.gkbpx.com
Description
Activate the parameter "Display receive error at FB" to
also display a message frame received with errors at the
status output of the function block P_RCV_RK.
If the parameter is deactivated, an entry is only created in
the diagnostic buffer of the CP 341.
Basic Principles of Serial Data Transmission
2.8 Configuration data
Range of
values
• Yes
No
•
Range of values Default value
None R(A) 5V / R(B) 0V
R(A) 5V / R(B) 0V
R(A) 0V / R(B) 5V
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Default value
No
83