12© Panasonic Electric Works SUNX Co., Ltd. 2011 MJE-SFBHC No.0024-49VFunctional Descriptions3-1-2 Floating Blanking FunctionThis function is set in each SF4B / SF4B series.If the number of the blocked beam channels is less than the set number of the beam channels, thecontrol output (OSSD 1 / 2) of SF4B / SF4B 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 $&{ = & & " Y+ + QIneffective setting of both end beam channel "
" = & & $ -lected._ SET (Effective) : The floating blanking function becomes ineffective for the both end beamchannels. In case either end of the beam channel is blocked, the control out-put (OSSD 1 / 2) of SF4B / SF4B series is turned “OFF” regardless ofthe set number of the beam channels._ G{@ " Y~ = & & $ " $ -cluding both end beam channels.Non-serial beam channel setting_ SET (Effective) : Even if the beam channels are blocked discontinuously in the set beamchannels, the control output (OSSD 1 / 2) of SF4B / SF4B series isturned “ON.” (Discontinuous mode)_ CLR (Ineffective) : When the beam channels are blocked discontinuously even in the set beamchannels, the control output (OSSD 1 / 2) of SF4B / SF4B series isturned “OFF.” (Continuous mode)[For use in Europe (EU) (as EN 999)] (Also applicable to ISO 13855)(For intrusion direction perpendicular to the sensing area) Equation S = K × T + CS : Safety distance (mm)Minimum required distance between the sensing area surface and the dangerous parts ofthe machine.K : Intrusion velocity of operator’s body or object (mm/sec.)Taken as 2,000 (mm/sec.) for calculationT : Response time of total equipment (sec.)T = T m + TSF4BT m : Maximum halting time of machine (sec.)T SF4B : Response time of SF4B / SF4B series (sec.)C : Additional distance calculated from the size of the minimum sensing object of the SF4B /SF4B series (mm)However, the value of C cannot be under 0.C = 8 × (d - 14)d: Diameter of the minimum sensing object (mm) & = & & + ? $$$ &: -comes larger, and the safety distance is longer as well. For the calculation of the safetydistance, refer to the instruction manual enclosed with SF4B / SF4B series. Before designing the system, refer to the relevant laws and standards of the regionwhere SF4B / SF4B series is to be used and then install SF4B / SF4B series. The minimum sensing object differs depending on the set number of the beam channels.
