Siemens SIMATIC MV440 - Control with FB79

Process interfacing via an automation system (PLC, PC)
10.4 Control with FB79
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
269
10.4 Control with FB79
Principle of data transmission via PROFINET IO
The following figure shows the reader interfaces relevant for data transmission via
PROFINET IO (FB79).
'3PDVWHU,2FRQWUROOHU
5HDGHU
&RQWUROE\WH
6WDWXVE\WH
8VHUGDWD
LQWHUIDFH
6HQG
E\WHV
8VHUGDWD
LQWHUIDFH
5HFHLYH
E\WHV
F\FOLF
Figure 10-4 Principle of data transmission via PROFINET IO (FB79)
Note
Bytes 1 to 31 of the "Send" user data interface are relevant. Bytes 1 to 4 of the "Receive"
user data interface are relevant.