Safety Integrated - Industry - Siemens

F-I/O-module data block
What is an F-I/O-module data block
For every F-I/O-module one data block is automatically generated
during compilation in the STEP 7 hardware configuration.
The F-I/O-module data block is the interface between the user
program and the F-system. Control and status information of
the F-I/O-module are exchanged via the interface.
The F-I/O-module data block contains variables which can be
accessed by the safety program as well as the standard program.
The F-I/O-module data block does not contain any process
values. The process values are located in the process image
of the F-CPU.
In standard program read
In the safety program read and write
Access to the F-I/O-module
data block
The following figure illustrates the relationships.
Functional Example No. AS-FE-I-011-V10-EN 349
Ex. No.
11