Floating Blanking Function - Panasonic SF4D-TM1 User Manual

Communication module for the sf4d series

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Table Of Contents

Table of Contents

5-4-2 Floating Blanking Function

This function prevents the light curtain's control output (OSSD 1 / 2) from turning OFF when the num-

ber of blocked beam axes is equal to or less than the set number of beam channels in any position.

This function is convenient when there is a moving obstacle in the sensing area.

The factory setting for the floating blanking function is invalid.

The following settings can be selected.

● Number of floating blanking beam channels

Set a minimum number and maximum number of beam channels.

● Both end beam axes valid / invalid setting

You can validate or invalidate the floating blanking function for both end beam axes of the light curtain.

When the both end beam axes setting is "invalid", the floating blanking function is invalid for

both end beam axes. When even one of the end beam channels is blocked, the light curtain's

control output (OSSD 1 / 2) turns OFF, regardless of the set number of beam axes.

● When the floating blanking function is used, the minimum sensing object becomes larger, and

the safe distance also becomes longer. To calculate the safe distance, refer to the "Light Cur-

tain Instruction Manual".

● Before designing and installing the system, refer to the applicable laws and standards of the re-

gion where the light curtain is to be used.

● The minimum sensing object varies depending on the number of set beam channels.

● When the floating blanking function is used, the light curtain's digital indicator / received light

amount (green) turns OFF when there is a blocking object in the sensing area, regardless of the

intensity of light received.

● The light curtain only operates in continuous mode. If beam axes are blocked discontinuously,

the control output (OSSD1 / 2) of the light curtain turns OFF, even if less than the set number of

channels are blocked.

[For use in Europe (EU) (based on EN ISO 13855)] (Also applies to JIS B 9705)

(For intrusion perpendicular to the sensing area)

● Equation 1

S: Safety distance (mm)

Minimum required distance between the sensing area plane and the dangerous part

of the machine

K: Intrusion speed of person or object (mm/s)

Normally 2,000 (mm/s) is used.

T: Response time of overall system (sec)

T=T

: Maximum response time of machine (sec)

SF4D

C: Additional distance calculated from the minimum sensing object of the device (mm)

The value of C cannot be less than 0.

C=8 × (d-14)

d: Diameter of minimum sensing object (mm)

SF4D-F□

SF4D-H□

SF4D-A□

S=K×T+C

SF4D

: Response time of device (sec)

Not set

ø14mm

ø25mm

ø45mm

CAUTION