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3-1-2 Floating Blanking Function
This function is set in each SF4B / SF4B<V2> series.
If the number of the blocked beam channels is less than the set number of the beam channels, the
control output (OSSD 1 / 2) of SF4B / SF4B<V2> series is not turned "OFF."
This function is useful when an obstacle moves within the sensing area.
The factory setting of this function is "ineffective."
The following items can be set.
Set number of beam channels
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Ineffective setting of both end beam channel
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lected.
‡ SET (Effective) : The floating blanking function becomes ineffective for the both end beam
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Non-serial beam channel setting
‡ SET (Effective) : Even if the beam channels are blocked discontinuously in the set beam
‡ CLR (Ineffective) : When the beam channels are blocked discontinuously even in the set beam
[For use in Europe (EU) (as EN 999)] (Also applicable to ISO 13855)
(For intrusion direction perpendicular to the sensing area)
<In case that the minimum sensing object is ø40mm or less>
Equation
S : Safety distance (mm)
Minimum required distance between the sensing area surface and the dangerous parts of
the machine.
K : Intrusion velocity of operator's body or object (mm/sec.)
Taken as 2,000 (mm/sec.) for calculation
T : Response time of total equipment (sec.)
T = T
m
T
: Maximum halting time of machine (sec.)
m
T
: Response time of SF4B / SF4B<V2> series (sec.)
SF4B
C : Additional distance calculated from the size of the minimum sensing object of the SF4B /
SF4B<V2> series (mm)
However, the value of C cannot be under 0.
C = 8 × (d - 14)
d: Diameter of the minimum sensing object (mm)
© Panasonic Electric Works SUNX Co., Ltd. 2011 MJE-SFBHC No.0024-49V
channels. In case either end of the beam channel is blocked, the control out-
put (OSSD 1 / 2) of SF4B / SF4B<V2> series is turned "OFF" regardless of
the set number of the beam channels.
cluding both end beam channels.
channels, the control output (OSSD 1 / 2) of SF4B / SF4B<V2> series is
turned "ON." (Discontinuous mode)
channels, the control output (OSSD 1 / 2) of SF4B / SF4B<V2> series is
turned "OFF." (Continuous mode)
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comes larger, and the safety distance is longer as well. For the calculation of the safety
distance, refer to the instruction manual enclosed with SF4B / SF4B<V2> series.
Before designing the system, refer to the relevant laws and standards of the region
where SF4B / SF4B<V2> series is to be used and then install SF4B / SF4B<V2> series.
The minimum sensing object differs depending on the set number of the beam channels.
S = K × T + C
+ T
SF4B
Functional Descriptions
12
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