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Controlling with a PLC
6.2
Control via the "PROFIBUS DP" Interface
6.2.1
Principle of Data Transmission via PROFIBUS DP
The following block diagram shows the relevant interfaces of the processing unit for
data transmission over PROFIBUS DP.
DP master
Note
Of the "Send" user data interface, bytes 1 to 31 are relevant, of the "Receive" user
data interface, only byte 1 is relevant.
If these two user data interfaces are not located in the process image of OB1, you
must use SFC 14 "DPRD_DAT" during the data transfer from the "Send" user data
interface of the processing unit to the DP master to ensure data consistency. In
the opposite direction, SFC 15 "DPWR_DAT" must be used for data transmission
from the DP master to the "Receive" user data interface.
6-6
Processing unit
Control byte
Status byte
Nutzdaten-
User data
schnittstelle
interface
"Send"
"Senden"
(32 bytes)
(32 Bytes)
User data
interface
"Receive"
(32 bytes)
Vision Sensor VS 130
A5E00199459-01
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