Publication 1752-UM001A-EN-P - October 2006
Function Blocks Command Reference 183
Muting Function Details
The Muting Function Block reset, start, and stop conditions are
described in the following sections.
Reset Conditions
The safety output (Output Enable) is on when all of the following
conditions are met:
• The light curtain signal is active (light incident).
• A discrepancy error has not occurred.
Start Conditions
If the muting sensors meet the following conditions while the Output
Enable signal is on, muting is applied, and the muting signal turns on:
1. The muting sensors are all off.
2. While the muting sensors are off, two muting sensors detect an
object in the correct sequence.
3. While the muting sensors are off, the synchronization times of
the two muting sensors are within the normal range (not
including the position detection setting).
If an error occurs, an alarm output is generated. The sequence error
signal goes on if there is an invalid sequence. The synchronization
error signal goes on if an object cannot be detected within the
synchronization time. The safety output (Output Enable) goes off if
the light curtain signal is inactive (no light) before the controller
transitions into the muting state.
Stop Conditions
If the following conditions are met while muting is in effect, the
muting is stopped, and the muting signal turns off:
• Two or more sensors are not on.
• The maximum muting time has elapsed.
• A discrepancy error has occurred.
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