Getting started
2.1 Introduction to example
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA
27
Example structure and task definition
Production cell with access protection
Control panel with start and acknowledgement pushbuttons
A laser scanner monitors the entry to the production area. A safety door secures the service
area.
Entering the production area or opening the safety door results in a stop or shutdown of the
production cell similar to an emergency stop.
The system can only be restarted when the emergency stop is cancelled, the safety door is
closed, and the laser scanner detects no one in the protected area. The user must
acknowledge that conditions have returned to a safe state before production can be
restarted.
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