Light Curtain Muting Examples

From the instant the first of the two muting sensors is cleared.

Light curtain muting examples. Safety light curtains with muting area monitoring by means of safety light curtains. After 3 seconds the status output and mute function turn off. Light curtain is violated muting the light curtain using f cpu freeing of workpieces sequential muting with 4 muting sensors 2 sensor pairs is implemented in the application example. Light curtain with muting two sensor l type and configurable safety relay introduction light curtains are used to detect attempted access to a hazardous area.

For this purpose muting sensors are installed on both sides of the light curtain which determine in which cases to activate muting. Various types and sizes of. Usually safety light curtains with vertical detection zones. Muting shall be desabled as soon as the light curtain is cleared and not later than 4 seconds max.

In addition to muting these modules monitor up to three light curtains with presence. Important this application example is for advanced users and assumes that you are trained and experienced in safety system requirements. Muting differentiation between humans and machine lock application blanking european version. As an example muting a light curtain would ignore the light curtain safety function.

First we test the safety light curtain and latch reset with mute off. The temporary automatic suspension of a safety function during the non hazardous portion of the process machine cycle. 2 2 example minimum distance calculation for the lock application. The timer monitoring the 4 seconds shall be a safety related item.

Muting sensors shall be positioned beyond the light curtain in the dangerous area. For the transport direction of the workpiece both directions are permitted. Some typical muting applications include but are not limited to. In material handling applications material is allowed to pass through the protective field without shutting down the machine.

In normal operation if a light curtain detects an object it causes the safety system to stop any hazardous motion in the hazardous area. When enabled a function block is purple with a 3 second count down timer. It is not to be confused with blanking or bypassing. Also the status output for the mute light changes to green.

Next lets test the mute function. If the light curtain is muted then the demand on the light curtain is ignored if the muting sensors and light curtain are broken in the proper order. Muting light curtain monitoring relays allow the automatic temporary suspension of the safety function if certain conditions are met.