Optimizing Safety Programs; Optimizing The Compilation Duration And Runtime - Siemens SIMATIC S7-1200 Safety Programming Manualline

4 Optimizing Safety Programs

Optimizing Safety Programs
4
4.1

Optimizing the compilation duration and runtime

Introduction
User programming protection by coded processing is an important part of a safety
program (see Chapter 5). The objective is to detect any data corruption in the
safety program and thus prevent non-safe states.
This protection program is generated during the compilation, which extends the
compilation duration. The protection program also extends the F-CPU's runtime as
the F-CPU additionally processes this program and compares the results with the
user program.
You will find the protection program that is automatically generated by the system
in the system block folder of your F-CPU.
Figure 4-1: Protection program
User-generated
F-blocks
Some of the instructions that can be used in the safety program influence a fail-
safe controller's performance to a greater extent than others.
This chapter shows different options for reducing the compilation and program
runtime.
Safety Programming Guideline
Entry ID: 109750255, V1.0, 10/2017
System-generated
F-blocks
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