Autonics BF4R Посібник - Сторінка 6

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1. Sensitivity Adjustment

BF4 Series

Setting as max. sensitivity (common)

① Set the mode setting switch to [SET].

② If there is no sensing target,

- Light ON: Press the [ON → OFF] button

- Dark ON: Press the [OFF → ON] button

③ Set the mode selection switch to [LOCK] mode.

※ External sensitivity setting

- Light ON (From above ③)

External sensitivity setting ON input (High→Low→High)

External sensitivity setting OFF input (High→Low→High)

- Dark ON Mode (From above ③)

External sensitivity setting OFF input

(High→Low→High)

External sensitivity setting ON input (High→Low→High)

< Application >

● To extend sensing distance (diffuse reflective type):

If fiber optic sensor is used in place where there are

targets with high reflectivity and low reflectivity, it is able

to get stable detection by adjusting max. sensitivity.

● Used at bad environment (through-beam type):

If fiber optic sensor is used in place where there is lots of

dust or moisture, it might cause malfunction.

It can perform the stable detection by using max.

sensitivity.

External input sensitivity setting type

[BF4 -R]

External input sensitivity setting type, BF4 -R can adjust

the sensitivity with input signal lines without the mode

setting switch.

● Light ON

- ON input of remote sensitivity setting (SW1):

Turns ON the SW1 and then turn OFF instead of ③ state

of adjustment by the sensitivity setting button.

- OFF input of remote sensitivity setting (SW2):

Turns on the SW2 and then turn OFF instead of ⑤ state

of adjustment by the sensitivity setting button.

● Dark ON

- OFF input of remote sensitivity setting (SW2):

Turns on the SW2 and then turn OFF instead of ③ state

of adjustment by the sensitivity setting button.

- ON input of remote sensitivity setting (SW1):

Turns on the SW1 and then turn OFF instead of ⑤ state

of adjustment by the sensitivity setting button.

State

Signal condition

High

4.5-30VDC or Open

Low

0-1VDC

※ Input impedance:10kΩ

B-38

(brown) +V

(black) Control output

(white) Self-diagnosis output

(pink) ON input of remote sensitivity setting

(orange) OFF input of remote

sensitivity setting

S/W2

S/W1

(blue) 0V

Prohibition of inputting External

sensitivity setting [BF4 -R]

Even though mode switch is at Lock position, it is able to

input external sensitivity setting when Switch 1 and Switch

2 are ON. Therefore please install Switch 3 in order to

prevent from malfunction as below.

※ SW3 - OFF: Disable to set external sensitivity

※ SW3 - ON: Enable to set external sensitivity

(Brown) +V

(Black) Control output

(White) Self-diagnosis output

(Pink)ON input of remote sensitivity setting

(Orange)OFF input of remote

(Blue)0V

Switch for prohibiting sensitivity setting

Self-diagnosis output (answer back)

function [BF4 -R]

When ON or OFF input of remote sensitivity setting is

applied, after 300ms, self-diagnosis output turns on for

40ms and then the sensor keeps normal sensing state.

(Note: Time chart)

※ Self-diagnosis output does not turn on if there is no

difference of sensitivity between ON input and OFF input

and stable sensing is not executed, but stable sensing

operates after 340ms.

Power

supply

OFF

Remote

High

sensitivity

(OFF)

setting

Low

ON input

(ON)

Remote

High

sensitivity

(OFF)

setting

Low

OFF input

(ON)

Self-

diagnosis

output

(Answer

OFF

back

function)

Sensing

output

※ During period T3 (approx. 300ms), do not change the

received light value by moving the object, etc.

● T1≥1,000ms : after power turns ON, it can be set after 1sec.

● T2≥5ms : ON/OFF input time of remote sensitivity setting

must be min. 5ms

● T3≒300ms : when ON/OFF input of remote sensitivity

setting is applied, self-diagnosis output turns ON after

300ms)

● T4≒40ms : ON time of self-diagnosis output

● T5≥500ms : when ON input of remote sensitivity setting

is applied, apply OFF input of remote sensitivity setting

after 500ms

sensitivity setting

T3 ※

Detectable