Publication 1752-UM001A-EN-P - October 2006
Function Blocks Command Reference 191
4. As the workpiece continues to advance, the workpiece is no
longer detected by sensor 21 at the entrance (sensor 12 during
workpiece exit), the muting status is cleared, and the muting
signal turns off.
Distance Settings
When setting up this type of muting application, the distance settings
must prevent a passing person from enabling the muting function, and
the light curtain and muting sensors must be set up so that a
workpiece passes by all of the muting sensors before the next
workpiece arrives at the muting sensors.
To calculate the appropriate setup distances for this example, use
these formulas, where:
D2 and D3 = minimum distance required for muting sensor
performance
d2 = maximum distance required for muting sensor performance
L = length of the workpiece
V = transit speed of the workpiece
T1min = controller cycle time
T1max= synchronization time setting (the default setting is 3
seconds)
Formula 3: D2 < L
Formula 4: D3 < L
Formula 5: V x T1min < d2 < V x T1max
For the muting function to operate effectively, formulas 3, 4, and 5
must be satisfied.
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