Control With Fb 79; Assignment Of The Interfaces Relevant To Profinet Io - Siemens SIMATIC MV540 H Operating Instructions Manual

Process interfacing via an automation system (PLC, PC)

9.4 Control with FB 79

9.4 Control with FB 79
Principle of data transmission via PROFINET IO
The following figure shows the interfaces of the optical reader that are relevant for data
transmission via PROFINET IO (FB 79).
Figure 9-3
Note
Relevant bytes of the user data
Bytes 1 to 31 of the "Send" user data interface are relevant. Only bytes 1 to 4 of the
"Receive" user data interface are relevant.
9.4.1

Assignment of the interfaces relevant to PROFINET IO

Control/status byte
Table 9- 33
Bit
0
1
126
Principle of data transmission via PROFINET IO (FB79)
Assignment of control bytes (input signals)
Signal Description
DISA Disable
Disables manual keyboard input, program selection and program sav-
ing, error acknowledgment, starting the optical reader
SEL0 Select 0
1)
Program selection bit 0
Operating Instructions, 06/2018, C79000-G8976-C494-01
SIMATIC MV500