F39-TGR-CVL-B-2-R datasheet(31/98 Pages) OMRON

31 / 98 page

Floating Blanking

Section 5-2

5-2

Floating Blanking

!WARNING Use of Fixed Blanking and Floating Blanking will make the MS4800 system

less sensitive to objects in the detection zone. Improper use of these features

can result in severe injury to personnel. Fixed Blanking may require a hard

barrier. Fixed Blanking and Floating Blanking may require an increase in the

safety distance. Read the following section carefully.

One channel can be obstructed at any location in the detection zone as long

as the optical synchronization is maintained. Please refer to chapter 5-4 Opti-

cal Synchronization for further details.

This means that an object can freely float from one end of the protective field

to the other without the MS4800 system entering the MACHINE STOP state.

The obstructed channels are not fixed at a single location but "float" through

the detection zone.

Note Please refer for further information to the FAQ to section 17-6.

5-2-1

Selecting Floating Blanking with selector switches

Using the selector switches an authorized user can activate the Floating

Blanking function. This allows the system to operate with one obstructed opti-

cal beam anywhere within the protected zone. This obstruction is permitted

anywhere within the protected zone and is permitted to move over time. After

setting the appropriate selector switches, the receiver enters the Power-On

Self Test state and if no faults are detected the receiver shall enter the INTER-

LOCK or MACHINE RUN condition depending upon the selected operating

mode.

!WARNING Two-Beam Floating Blanking is not available on the MS4800 system.

Floating

Blanking

Inactive

Channel

Floating

Blanking Active

Channel

Floating

Blanking Active

Channel

Floating

Blanking Active

Channel

Floating

Blanking Active

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

System

Response

Exception

MACHINE STOP

Exceptions

Machine

Run

Exception

Machine

Run

Exceptions

MACHINE STOP

Exceptions

MACHINE STOP

Clear Optical Channel

Optical Channel is obstructed

Floating Blanking Effects on Minimum Object Resolution

Standard Minimum Object Resolution

(No Floating Blanking)

Minimum Object Resolution with

1 Beam Blanking

14 mm

24 mm

30 mm

50 mm

F39-TGR-CVL-B-2-R Datasheet(PDF) 31 Page - Omron Electronics LLC

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