Rockwell Automation MSR42 Curtains Configuration and Diagnostic Software Tool User Manual - Manual (Page 47)

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Light Curtain Multi-Function Control Module User Manual
Original instructions
Figure 63: Example, “two sensor (S1 and S2) L-type” muting
This muting mode is used to allow a load to exit a dangerous area while helping prevent access from outside the dangerous area. The object coming from
the dangerous area interrupts the two muting sensors initiating the muting of the safety light curtain. As the object continues to move through the
protective field muting remains active until the light curtain is no longer interrupted.
According to IEC 62046:
Muting of the safety light curtain is initiated only after muting sensor S1 and S2 are activated within the specified time t(sens). The muting condition
will stop after t(espe) is exceeded, the light curtain is no longer interrupted or the maximum muting time t(mute) is exceeded (muting time out), which
ever occurs first.
Figure 64 shows the corresponding timing sequence
Figure 64: Timing sequence for “two sensors L-type” muting
It should not be possible for a person to pass undetected to the left or right of the object during the muting process.
The following parameters can be configured in the configuration window ( Figure 65) for “two sensor L-type” muting.
A detailed description about muting, muting restrictions as well as hints for the installation are given in the
standard IEC 62046. Additional hints are mentioned in the attachment A7 of IEC 61496-1.