Siemens SIMATIC ET 200AL - Page 1311

Functions
5.5 Intelligent DP slaves (I-slaves)
PROFIBUS with STEP 7 V13
88 Function Manual, 12/2014, A5E03775446-AC
Programming the DP master
To program the sample program for the DP master, follow these steps:
1. Using the SCL programming language, create a new function with the name "further
processing" in the project tree under "Program blocks" > "Add new block". Open the
function.
2. In the interface of the function "further processing", create the following tags:
Name
Data type
Input/output type
result bool Input
output bool Output
3. In the instruction window of the function "further processing", write the following program
code:
#output:=#result;
4. Call the function "further processing" in a cycle OB, for example, in OB1.
5. Wire the function "further processing" in the cycle OB as follows:
Figure 5-19 DP master sample program
Result
You mastered the task successfully.