Functions
5.5 Intelligent DP slaves (I-slaves)
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC
81
5.5.2
Data exchange with higher-level DP master
Introduction
The following section describes the data exchange between the I-slave and the higher-level
DP master.
Transfer areas
Transfer areas are an interface to the user program of the I-slave CPU. Inputs are processed
in the user program and outputs are the result of the processing in the user program.
The data for communication between DP master and I-slave is made available in the transfer
areas. A transfer area contains an information unit that is exchanged consistently, in terms of
bytes, words or overall, between DP master and I-slave. You can find more information on
configuration and use of transfer areas in the section Configuring transfer areas (Page 84).
The following figure shows the data exchange between the I-slave and the higher-level DP
master. The individual communication relations are explained below based on the numbers.
Figure 5-14 Data exchange with the DP master
Summary of Contents for SIMATIC ET 200AL
Page 2: ......
Page 143: ......
Page 218: ......
Page 250: ......
Page 296: ......
Page 337: ......
Page 365: ......
Page 392: ......
Page 419: ......
Page 451: ......
Page 483: ......
Page 597: ......
Page 648: ......
Page 702: ......
Page 739: ......
Page 781: ......
Page 804: ......
Page 828: ......
Page 853: ......
Page 880: ......
Page 906: ......
Page 996: ...Diagnostics ...
Page 1121: ......
Page 1565: ......