30 Rockwell Automation Publication 440C-WD001C-EN-P - June 2015
Chapter 5 Muting 2-Sensor L-Type Unidirectional
Operational Sequence
The muting sensors and the light curtain participate in the sequence of events to
achieve the muting. The material must move past the sensors and into the light
curtain within the synchronization times, which are set in the Connected
Components Workbench function block. In addition, the material must move
through the light curtain within the muting time, which is also set in the
Connected Components Workbench function block.
Figure 17 - Operational Sequence
As the material moves out of the hazard area, it first breaks muting sensor 1
(MS1). The material continues to move and must break muting sensor 2 (MS2)
within the first synchronization time, which is set on the Connected
Components Workbench software to 1 second. Then, the muting lamp turns
ON and the light curtain is muted. The material continues to move and must
break the light curtain within the second muting time, which is also set on the
Connected Components Workbench software to 1 second. Finally, the material
must move through the light curtain within the muting time, which is configured
on the Connected Components Workbench software to 10 seconds.
If the material movement exceeds one of the synchronization times or the muting
time,
the conveyor stops. An operator can press and hold down the override
button during the override time. The conveyor contactors turn on until the
override time expires (or the operator releases the button).
LC
Muting sensor 1
Muting sensor 2
Muting lamp
t > 30ms
t > 30ms
t > 50ms
30ms <= t
t < synchronization
time
30ms <= t
t < synchronization
time
t < muting time
muted
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