Rockwell Automation MSR42 Curtains Configuration and Diagnostic Software Tool User Manual - Manual (Page 41)

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Light Curtain Multi-Function Control Module User Manual
Original instructions
5.6.6. Muting with enable signal
This function is only available for 2 sensor T-type with enable applications. In some applications muting should only be possible at certain times, for
example only when a conveyor is running. Likewise when the conveyor stops the muting function should also stop and the light curtain should return to
the normal safety mode. In this example the conveyor run signal (S3 in
Figure 54) is also the muting enable signal. Only when this signal is “low” can
muting be initiated.
Figure 54: 2 sensor T-type with enable signal (S3). Click on “?” to display timing diagram
5.6.7. Muting disable function
This function is only available for 2 sensor T-type and 2 sensor L-type applications.
If this function is used two additional mute disable signals are required. These signals must be “high” in order for a mute condition to take place. In some
applications these signals are provided by sensors placed to detect a person moving into the dangerous area, either to the left or right of the object. If
either of these signals is “low” (e.g. a sensor detects a person) a muting condition can not take place, or if already in progress, the muting condition will
cease. Muting can be initiated again only after both disable signals have simultaneously gone “low”. (
Figure 59 and Figure 63)
5.6.8. Safety light curtain interruption monitoring function
Some applications require that the interruption of the safety light curtain be part of the muting signal sequence. When this function is configured the
MSR42 will detect an interruption of the safety light curtain and it will also monitor:
A. The time from when the muting condition has started until the safety light curtain is interrupted.
B. The time from when the safety light curtain is no longer interrupted until the muting condition has stopped.
This time is referred to as “t(espe)”.
It must be confirmed that the configuration of a muting sensor output delay does not have influence on the
safety of the application. For example, the position of the muting sensors may have to be considered.
The mute dependent override function supersedes the muting disable signals.