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Siemens SIMATIC S7-1200 Güvenlik Programlama Manualline

3 Methods for Safety Programming

3.5.2

Standardizing actuator control

Recommendation

Create a separate function block for each actuator type (e.g., contactors, valves,

drives, etc.) that combines actuator control and the necessary auxiliary functions.

Use this actuator block for other actuators of the same type.

Create F-data types for complex actuators.

Auxiliary functions for a safe actuator include, for example:



Feedback circuit monitoring



Error acknowledgment



Edge evaluation



Time functions



Functional switching



Provision of diagnostic information

Figure 3-7: Standardizing actuator control

Safety Programming Guideline

Entry ID: 109750255,

V1.0,

10/2017