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Omron F3SN, Function Description

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Omron F3SN Function Description Download Page 8

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No. ST2-015031A                    -8-                         

    

 

1.3.2.  Floating blanking 

When more beams are interrupted than the specified number, the OSSD outputs go to the 
OFF-state. For example, if two beams are specified, the interruption of three or more beams 
is necessary to make OSSD outputs go to OFF-state. Up to three beams can be specified as 
floating. This function is used when there is a moving object in the detection zone that needs 
to be ignored. When the floating blanking function is valid, the blanking indicator is lit on a 
receiver. 
 
There are two modes in the floating blanking function. 
(1)  Sequential beam mode 

The mode ON:    When the number of consecutive obstructed beams exceeds the speci-

fied number of floating beams, the OSSD outputs go to the OFF-state. 
It means that the object size in the detection zone must be large 
enough to obstruct the floating beams completely at the same time to 
make the OSSD outputs OFF. Even if there exist plural smaller ob-
jects in the detection zone, the OSSD outputs keeps in ON-state.           

The mode OFF: When the total number of obstructed beams, which may not be con-

secutive, exceeds the specified number of floating beams, the OSSD 
outputs go to the OFF-state. 

 
 
 
 
 
 
 
 
 
 

- Sequential beam mode= ON 

Æ

 OSSD outputs =ON 

- Sequential beam mode= OFF

Æ

 OSSD outputs =OFF 

 

 

 

The sequential beam mode should be set ON when the ignored moving object is only one, 
and the mode should be set OFF when the objects are more than one, we recommend.   

Obstructed 
Light reception 

Condition: Three beams are floating 

Summary of Contents for F3SN

Page 1: ...scription S S S S S S S Sa a a a a a a af f f f f f f fe e e e e e e et t t t t t t ty y y y y y y y L L L L L L L Li i i i i i i ig g g g g g g gh h h h h h h ht t t t t t t t C C C C C C C Cu u u u u u u ur r r r r r r rt t t t t t t ta a a a a a a ai i i i i i i in n n n n n n n F3SN F3SN F3SN F3SN ...

Page 2: ... Start interlock 5 1 2 3 Restart interlock 6 1 3 Blanking function 7 1 3 1 Fixed blanking 7 1 3 2 Floating blanking 8 1 4 External device monitoring EDM 11 1 5 Auxiliary output function 12 1 5 1 Dark ON output mode 12 1 5 2 Light ON output mode 12 1 5 3 Outermost beam monitoring mode 13 1 5 4 Lockout mode 13 1 5 5 Light diagnosis mode 14 1 5 6 Specified beam mode 14 1 5 7 Blanking monitoring mode ...

Page 3: ...al l l l l l l l t t t t t t t te e e e e e e es s s s s s s st t t t t t t t f f f f f f f fu u u u u u u un n n n n n n nc c c c c c c ct t t t t t t ti i i i i i i io o o o o o o on n n n n n n n This function stops light emission of an emitter It is available for checking if the F3SN can show the correct OSSD Output Signal Switching Device outputs state and so on Directions for use Applying a ...

Page 4: ... ing corresponds to Manual reset mode the interlock function s are available For the fac tory setting both the start interlock and the restart interlock are set valid Direction for wiring Interlock selection input line Reset input line Manual reset mode 24 V PNP 0 V NPN A push button NO contact which connects with 24V PNP or 0V NPN Refer to the following diagram Auto reset mode 0 V PNP 24 V NPN 1 ...

Page 5: ...erlock function needs the wiring of Manual reset mode for the interlock selection input line and the reset input line Refer to 1 2 1 It is possible to release the interlock by applying 24 V for PNP type or 0V for NPN type to the reset input and by making the line open subsequently Application When you supply a machine with power at the start of work and you want to keep stopping it until the daily...

Page 6: ...erlock function needs the wiring of Manual reset mode for the interlock selection input line and the reset input line Refer to 1 2 1 It is possible to release the interlock by applying 24 V for PNP type or 0V for NPN type to the reset input line and by making the line open subsequently Application When you want to keep stopping a machine until you confirm its safety and get ready to re start it ev...

Page 7: ...de valid 3 The blanked beams are selected There are two methods of the selection teaching and manual Note 1 When a blanked beam gets in the light reception state the blanking function stops not only for the light reception beam but also for all beams automatically After the power is restored the fixed blanking function gets available with the previous setting Note 2 There is no limit for the numbe...

Page 8: ... modes in the floating blanking function 1 Sequential beam mode The mode ON When the number of consecutive obstructed beams exceeds the speci fied number of floating beams the OSSD outputs go to the OFF state It means that the object size in the detection zone must be large enough to obstruct the floating beams completely at the same time to make the OSSD outputs OFF Even if there exist plural sma...

Page 9: ...termost beam invalid mode is set as ON or OFF Note 1 Series connection The validity of the floating blanking depends on the setting of the 1CH sensor which is the closest to power supply Regarding the number of the floating beams the se quential beam mode and the outermost beam invalid mode the settings are applied to each channel sensor All relating to the floating blanking function are set inval...

Page 10: ...OFF Obstructed beam 1 Obstructed beam 2 b In case of 1 beam floating the sequential beam mode ON Outputs OFF when consecutive two or more beams are obstructed Outputs ON Outputs OFF Consecutive obstructed beam 1 Consecutive obstructed beams 2 Floating blanking function Setting configuration Obstructed beam Light reception beam Blanked by the fixed blanking and obstructed beam Floating blanking Val...

Page 11: ... a receiver via the series connected NC contacts of external relays for PNP type For NPN type 0 V is applied If an NC contact does not react within 300 ms the default time after the OSSD outputs change over the F3SN enters lockout condition EDM function Setting configuration The determination time allowed delay time must be set longer than the response time and release time of the relay or contact...

Page 12: ... operation modes by the F39 MC11 setting console 1 5 1 Dark ON output mode When a beam is interrupted the auxiliary output goes to the ON state This state is inverted from that of the OSSD outputs Response time OFF Æ ON ON Æ OFF response time of OSSD outputs x 2 ON Æ OFF ON Æ OFF response time of OSSD outputs x 5 Timing chart of the Dark ON output mode Power supply Light Dark OSSD outputs Auxiliar...

Page 13: ...me of OSSD outputs x 2 Note 1 When the fixed blanking function is used the outermost beam monitoring mode is not available Timing chart of the outermost beam monitoring mode Power supply Light Dark OSSD outputs Auxiliary output State 1 All beams Light State 2 No 1 beam Dark The others Light State 3 No 1 and 2 beam Dark The others Light tOFF ON Æ OFF response time of OSSD outputs 1 5 4 Lockout mode...

Page 14: ...and receiver deterioration of an LED and so on The unstable state means that the received light is in the range from OFF threshold 20 to ON threshold 20 Timing chart of the Light diagnosis mode Power supply State OSSD outputs Auxiliary outputs tOFF ON Æ OFF response time of OSSD outputs 1 5 6 Specified beam mode When any of specified beams is interrupted the auxiliary output goes to the ON state R...

Page 15: ...5 7 Blanking monitoring mode In case that the fixed blanking function is valid the output goes to the ON state when a blanked beam becomes light reception state Response time OFF Æ ON ON Æ OFF response time of OSSD outputs x 2 ON Æ OFF ON Æ OFF response time of OSSD outputs x 2 Timing chart of the blanking monitoring mode Power supply State of blanked beam Auxiliary output tOFF ON Æ OFF response t...

Page 16: ... OSSD outputs keeps in the OFF state 5 Floating blanking When more beams are interrupted than the specified number the OSSD outputs go to the OFF state Up to three beams can be specified as floating 6 EDM External device monitoring This function detects a failure of an external device such as a relay or contactor If the feedback signal from the external device is not correct the F3SN enters lockou...

Page 17: ...e er r r r r r r ri i i i i i i ie e e e e e e es s s s s s s s No ST2 015031A 17 3 3 3 3 3 3 3 3 R R R R R R R Re e e e e e e ev v v v v v v vi i i i i i i is s s s s s s si i i i i i i io o o o o o o on n n n n n n n h h h h h h h hi i i i i i i is s s s s s s st t t t t t t to o o o o o o or r r r r r r ry y y y y y y y Sym Date Contents Pages A 29 05 01 First edition ...

Page 18: ...Just Fit Reliable and Easy OMRON Corporation 2001 All Right Reserved Specifications are subject to change without notice ...

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