Safety Functions; Optional Safety Equipment; Light Barrier - Siemens SIDOOR ATD4 W Series System Manual

SIDOOR functions

4.4 Safety functions

4.4 Safety functions
Introduction
Using the safety functions described below, you can:
• Expand the system with optional safety devices
• Use the inputs with secure input signals
The effectiveness of the safety functions must be checked during commissioning of the system
and at regular intervals, depending on the application.
4.4.1

Optional safety equipment

4.4.1.1

Light barrier

Note
If the light barrier is operated according to this chapter (without sensor function test), no
performance level is determined for it.
Description of function
If no power is supplied at the light barrier input, this is interpreted as an interruption of the light
barrier. The door cannot then close.
If the light barrier is interrupted while the DOOR CLOSE command is active, the door is moved
in the OPEN direction. An interruption of the light barrier while the DOOR CLOSE command is
inactive does not change the state.
Exception: If the door is open less than 1 cm, the light barrier signal is ignored.
Connection and parameter assignment
SIDOOR ATD420W / ATD430W
The sensor signal must be generated by the PLC as part of the process image. See Table A-17
DCMD expansion bits (Page 320).
The status of the sequential control must be considered when using the light barrier (LB) signal.
The process data (including the LB signal) are only valid in the status "S4: Z_ operation" (see
112
WARNING
ATD4xxW for industrial applications
System Manual, 06/2022, A5E51901827B AA