Siemens SIMATIC ET 200AL - Page 1076

Functions
5.2 Intelligent IO devices (I-devices)
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
129
Programming I-device
To program the sample program for the I-device, follow these steps:
1. Using the SCL programming language, create a new function with the name
"preprocessing" in the project tree in "Program blocks" > "Add new block". Open the
function.
2. In the interface of the function "preprocessing", create the following tags:
Name
Data type
Input / output type
input 1
bool
Input
input 2 bool Input
result
bool
Output
3. In the instruction window of the function "preprocessing", write the following program
code:
#result:=#input 1&#input 2;
4. Call the function "preprocessing" in a program cycle OB, for example, in OB1.
5. Wire the function "preprocessing" in the program cycle OB as follows:
Figure 5-15 I-device sample program
Programming IO controller
To program the sample program for the IO controller, follow these steps:
1. Using the SCL programming language, create a new function with the name "further
processing" in the project tree in "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;