dl-breadcrumbs__homedl-breadcrumb-item__separatorAC500-S safety PLCdl-breadcrumb-item__separatorSafety user manual V1.3.2dl-breadcrumb-item__separator...dl-breadcrumb-item__separatorSafety application examplesdl-breadcrumb-item__separatorExample 2: mutingdl-breadcrumb-item__separatorFunctional description of safety functions
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Functional description of safety functions

This is the web edition of the original ‎⮫ AC500-S safety user manual, version 1.3.2. This web edition is provided for quick reference only. The original safety user manual must be used to meet functional safety application requirements.

All hazardous movements are stopped in case of:

  • an opening of the door.

  • an error (e.g., invalid muting sequence).

  • an interruption of the unmuted light curtain (e.g., by a person).

  • pushing an emergency stop button.

By pushing an emergency stop button, the operator can also stop all hazardous movements in stop category 0 (via SF_EmergencyStop and subsequent FBs).

An infringement of the unmuted light curtain stops all hazardous movements. In this application, a light curtain type 2 is used, which requires a test by the FB SF_TestableSafetySensor.

For the described muting function, four muting sensors are applied sequentially (via SF_MutingSeq). Additionally, the muting phase is indicated by a lamp, which is monitored in this case (also via SF_MutingSeq).

An additional door for maintenance purposes is monitored by a door switch (via SF_Guard).

By resetting buttons, the operator must acknowledge the detected demand of the safety functions and errors.

The initial state and the operational state of the connected actuator are checked by an external device monitoring. In case an error is detected, the control cannot become operational (via SF_EDM).

The process and related movements inside the production cell are controlled by the functional application. Within the safety application, this control is enabled by the above-described safety circuit (via SF_OutControl) and drives the actuator via a safety output.