Datalogic SG4 FIELDBUS Series, Instruction Manual, Page: 62 / 136

FUNCTIONS
52 SG4 EXTENDED
Muting L
In L type operation the device enters Muting function if the inputs go high in a particular
order: MUTING1 has to activate first, then MUTING2 can activate; if MUTING2 activates
before MUTING1, the device doesn't enter the Muting function.
“T12” is the activation delay between MUTING1 and MUTING2 that is selectable by the
user by means of ACM.
The Muting function ends after a time that is a multiple of the activation delay between
the two sensors (this time is m * T12). The value of “m” (T12 multiplier) can be chosen
by the user. In BCM this value is 2 by default.
The maximum activation delay between MUTING1 and MUTING2 can be set by the user
from a minimum of 1 sec to a maximum of 16 sec.
After this time, to enter in Muting the user has to deactivate the Muting input and start
the sequence from the beginning.
Figure 22 - Muting L timings
The sensor named A is the farthest from the light curtain, so its beam is intercepted
first. Referring to the next figure, since the pack goes from right to left only, B sensor
can't be intercepted first; if this happens the device doesn't enter Muting function.
“V” indicates a constant speed. As a consequence, “d1” is fixed according to the follow-
ing formula:
d1[cm] = V[m/s] * T12[s] * 100
Figure 23 - Muting L connection
CAUTION
Muting L must be used exclusively to allow the passage of the material
coming out of the dangerous area protected by the light curtain.