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5.3 Function Modes
The Light Curtain can be used with four different function types:
• Safety operating mode
• Start-Up inhibit and restart inhibit
• Contactor monitoring
These functions, and how to set them up at the Light Curtain, are explained in detail below. The Start-Up inhibit and
restart inhibit function types are treated as a single topic based upon the same setup procedure.
5.3.1 Safety Operating Mode
This function type is preselected at the factory (see also section 4.2). When the Light Curtain is set up in
accordance with section 5.2, the device is in the safety operating mode.
5.3.2 Start Inhibit and Restart Inhibit
After correct adjustment, the light curtain is ready for operation. If restart inhibit is active, the machine is not
re-enabled after the safety field has been interrupted until the acknowledgement button has been activated.
If the restart inhibit function has been activated, start-up inhibit is active as well. This means that the machine, or
the light curtain, must be enabled by means of the acknowledgement button when the machine is first switched on.
If the Restart Inhibit function is combined with the operation mode Fix Blanking, Floating Blanking, Auto Floating
Blanking or Reduced Resolution, first configure the respective operation mode, then activate the function.
The acknowledgement button has to be mounted in order that the whole danger zone can be seen while
pressing the acknowledgement button.
Acknowledgement must originate from outside of the protected area, from a location at which the protected
area and all of the effected working area can be clearly observed.
The button for the acknowledgement input may not be accessible from inside the protected area.
