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Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
Chapter 4 Safety Function
Figure 17 - Muting Time for Two-sensor T-type Muting Arrangement
For proper operation, MS1 and MS2 must be activated/deactivated within the
time (t
sens
), and the light curtain must be clear before the muting time (t
Mute
)
expires.
Muting of the safety light curtain is achieved only when muting sensor MS1
and MS2 are activated within the specified time (t
sens
). Since this muting
mode is bidirectional, the muting sequence also functions in reverse (for
example, muting sensor one before muting sensor two, or two before one are
both allowed). Both signals, however, cannot arrive simultaneously (t
sens
minimum). The muting condition stops if one of the muting sensors is not
activated or if the maximum muting time (t
Mute
) is exceeded (muting
timeout).
The minimum time between the sensors (t
sens
minimum) is dependent on the
position of the muting sensors and the speed of the object to be muted. You
must maintain at least a delay of t
sens
minimum for more dependable
operation.
shows the default timing values for T-type muting. These values can
be adjusted by using Connected Components Workbench software.
If t
sens
, t
espe
or t
Mute
is exceeded, the STS and the MUT indicator flashes
). The muting lamp output has the same characteristic as
the MUT indicator. If the material is backed away from the sensors, the fault is
cleared and the muting lamp turns off. If the material proceeds to break the
light curtain, the OSSD output turns off. The STS and MUT indicator continue
to flash. Use the muting override command to turn on the OSSD outputs
temporarily and clear the material from the protective field.
Table 10 - Two-sensor T-type Muting Default Settings
Parameter
Default Value
Parameter
Default Value
t
sens
4 s
t
mdo
20 s
t
sens
min
50 ms
t
espe
5 s
t
Mute
5 minutes
IMPORTANT
It must not be possible for a person to pass undetected to the left or
right of the object during the muting process.
ESPE
Muting Sensor S1 (S2)
Muting Sensor S2 (S1)
Mute
t
sens
t
sens
t
espe
t
Mute
t
espe