F39-TGR-CVL-B-2-R datasheet(28/98 Pages) OMRON

28 / 98 page

Fixed Blanking

Section 5-1

The effect of this tolerance also allows the number of blocked beams to vary

±1. For example, a Fixed Blanked area of 8 blanked beams is allowed to

increase to 9 beams or decrease to 7 beams and the light curtain will remain

in MACHINE RUN.

There is an exception when there is only one clear beam separating Fixed

Blanked areas. For only this case, there is no positional tolerance allowed on

that side of the clear beam for the object closest to the entry endcap so that

clear beam can only be used by the object further away from the entry end-

cap. See the following table:

The minimum number of beams in a Fixed Blanking area is one. If only one

beam is blanked, the number of blocked beams has a size tolerance of +1/-0

meaning the number of blocked beams can increase to two but the area can-

not be completely eliminated.

The Fixed Blanking pattern must not prevent the light curtain from synchroniz-

ing. This means that the size of the blanked object can not exceed certain lim-

its as long as synchronization is maintained.

Fixed Blanking is allowed during all modes of operation (automatic start, start

and start/restart interlock).

No Fixed

Blanking

Fixed

Blanking

Enabled

Fixed

Blanking

Enabled

Fixed

Blanking

Enabled

Fixed

Blanking

Enabled

Fixed

Blanking

Enabled

MACHINE

STOP

MACHINE

RUN

MACHINE

RUN

MACHINE

RUN

MACHINE

STOP

MACHINE

STOP

Clear Optical

Channel

Blocked Optical Chan-

nel

Optical Channel

Selected by Fixed

Blanking

Opposite to entry endcap end

Fixed blanking enabled

MACHINE RUN

MACHINE STOP

Entry endcap end

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