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Emergency stop switch

Regular price €4,90 EUR
Regular price Sale price €4,90 EUR
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Description

The FB_NotAus function block implements emergency stop logic with safe shutdown behavior according to EN ISO 13849. It evaluates the state of an emergency stop switch ( #E_Stop ) and controls normally closed ( #Out14 ) and normally open ( #Out22 ) contacts using realistic contact mapping. Virtual inputs ( #In13 , #In21 ) serve as enable signals. When activated, pressing the emergency stop button safely shuts down the machine and sets an error code. A reset or deactivation ensures a defined initial state.

Note: This logic is intended as a template. Before productive use, it must be integrated into the target environment, verified, and released by qualified personnel. Improper implementation may compromise protection features.

How it works
Reset / Deactivation

When #Reset is set or if the block is deactivated ( #Enable = FALSE), the outputs are set to a safe state: normally closed contact open, normally open contact open. The status indicates Reset/Deactivated; no errors are reported.

Simulation mode

In simulation mode, the behavior is simulated directly based on the inputs, independent of real safety connections:

  • #Out14 (normally closed) is set if #In13 is set and no emergency stop is active.
  • #Out22 (normally open) is set when #In21 is set and the emergency stop is active.

Errors and status are reset (OK).

Normal operation

If the emergency stop button is not pressed ( #E_Stop = FALSE ), the normally closed contact is set when the enable input #In13 is active, and the normally open contact remains inactive. When the emergency stop button is pressed, the machine is shut down:

  • #Out14 is forced open.
  • #Out22 is closed as an error signal if #In21 is present.

In the event of an emergency stop, #Error is set, #Status is set to 1 (E-Stop active) and #Diagnostic is set to 100 (emergency stop triggered).

Technical details
  • Inputs: #Enable , #Reset , #SimMode , #E_Stop , #In13 , #In21
  • Outputs: #Out14 (normally closed contact), #Out22 (normally open contact)
  • Status & Diagnostics: #Error , #Status (0=OK, 1=E-Stop active, 2=Reset/Disabled), #Diagnostic (e.g. 100 = Emergency Stop triggered)
  • Logic: Standard-compliant emergency stop with release, simulation and safe basic state
  • Modes: Reset/Disabled, Simulation, Real-time Operation
Possible applications
  • Protection of machines and systems through standard-compliant emergency stop circuits
  • Integration into safety-related control systems according to EN ISO 13849
  • Feedback of the shutdown state via opener/closer
  • Testing and validation in simulation mode without physical operation

Note: Safety-relevant validation and approval by qualified personnel is required before productive use.

compatibility
  • Can be used in PLC systems with SCL support (e.g. Siemens TIA Portal)
  • Integration into safety controls and hazard analyses
  • Safe basic state when deactivated
  • Virtual releases enable preparation and commissioning without actual emergency stop activation
Scope of delivery

You will receive:

  • An SCL file with the implemented function block FB_NotAus
  • Detailed declaration of all inputs/outputs and states
  • Commented logic for easy customization
  • Quick guide to secure integration into control systems

The download link will be provided after purchase.

Support

I support you with:

  • Adaptation of the emergency stop logic to specific machines
  • Integration into security architecture
  • Test and simulation without live emergency stop
  • Extension for redundant or extended safety circuits

Contact is possible via shop message or email. Individual adjustments are available as optional customizations.