Editing The Safety Program - Siemens SIMATIC S7-300 Getting Started

Function block FB 101
This block processes the signals of the emergency stop switch, the key switch and the door
contact switch securely with safety blocks. Signals for activation of the safety functions at the
drive will be written to the I/O area. This block also serves to reintegrate the drive after
passivation.
The function block is protected with the password "safety".
Advanced procedure
You create and generate the blocks of the safety program.
Note
For more detailed information on creating the safety program, refer to the manual
"S7 Distributed Safety - Configuring and Programming".
5.3

Editing the safety program

Requirement
The hardware configuration is complete, saved and compiled.
A fail-safe data block of type F-Global DB with the symbolic name F_GLOBDB is available in
the block folder of the S7 program. The F-Global DB is automatically inserted in HW Config
during saving and compiling of the hardware configuration when the "CPU contains safety
program" check box is selected in the properties of the CPU.
A fail-safe module of the type F_CALL is in the block folder of the S7 program.
Note
The "PROJECT_CPU317TF-3PN" sample project contains an FC1 block of the type
F_CALL.
Note
When the hardware configuration is compiled, S7 Distributed Safety automatically creates
fail-safe blocks that are required in the safety program. These blocks may not be deleted and
not be changed.
CPU 317TF-3PN/DP: Controlling a SINAMICS S120 with Safety Functions
Getting Started, 10/2013, A5E02982990-04
Programming
5.3 Editing the safety program
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