LA Series

LA Series

Technical information

Light Curtain Type LA

Status: 2011-04-27

Subject to change without notice.

No responsibility is taken for the correctness of this information.

Your suggestions for corrections or improvements are welcome!

Features

No separate control unit is needed. The device can be directly connected to 24 V DC.

2 short-circuit-proof PNP-outputs, NPNoutputs optionally

Functions and parameters configurable via

PC interface.

Easy-Run: full configuration settings from factory.

Automatic range setting during calibration cycle

Diagonal beams analysis for enhanced monitoring resolution.

DUOmetric AG

Weberstr. 8

86836 Lagerlechfeld /Graben

Tel: +49-8232-95979-0

Fax: +49-8232-95979-29 www.duometric.de

E-Mail: [email protected]

Technical information

Light Curtain Type LAII

Table of content

Features ..................................................................................................................... 1

Table of content .......................................................................................................... 2

The bars and mechanical design ................................................................................ 3

Functions .................................................................................................................... 4

Signal output ........................................................................................................... 4

Switching Threshold ................................................................................................ 4

Usage .................................................................................................................. 4

Output assignment .................................................................................................. 4

Output assignment „normal“ ................................................................................ 4

Output assignment „inverted“ .............................................................................. 4

Output as signment „inverted without warning“ .................................................... 5

OutDelay ................................................................................................................. 5

Beam variations ...................................................................................................... 6

Recommendations: ............................................................................................. 6

Contamination alarm ............................................................................................... 6

Recommendations: ............................................................................................. 6

TopBlankable .......................................................................................................... 7

Beam Blanking ........................................................................................................ 7

Recommendations: ............................................................................................. 7

Syncbeam

– Synchronisation beam ........................................................................ 7

Recommendations: ............................................................................................. 7

Areas....................................................................................................................... 7

Recommendations: ............................................................................................. 7

NOFDARK .............................................................................................................. 8

Configuration values ............................................................................................... 9

Recommendation ................................................................................................ 9

Calibration Sequence ............................................................................................... 10

Recommendations: ........................................................................................... 10

Flashing codes during the calibration cycle ....................................................... 10

LED Indicators / Error Diagnosis .............................................................................. 11

Receiver bar .......................................................................................................... 11

Transmitter bar ...................................................................................................... 11

Interfaces / Outputs .................................................................................................. 12

M8 connector ........................................................................................................ 12

Installation / Initial Operation .................................................................................... 12

Conformity ................................................................................................................ 13

Technical Data .......................................................................................................... 13

PC-Interface ............................................................................................................. 14

Ordering Key and Example....................................................................................... 15

Key: ....................................................................................................................... 15

Example ................................................................................................................ 15

Accessories .............................................................................................................. 16

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Technical information

Light Curtain Type LAII

The bars and mechanical design

A wide choice of beam spacing and attachment options (mechanical) is available.

Please refer to separate light curtain bar information sheet:

Information sheet: light curtain bars

Page LA 3 of LA 16

Technical information

Light Curtain Type LAII

Functions

Signal output

You can configure the light curtain to be light or dark switching via the output

function parameter.

Free beams interrupted beams light

active inactive

dark

inactive active

Switching Threshold

During the calibration sequence the signal intensity of each (parallel) beam is measured and permanently stored. By multiplying with the relative switching threshold (percentage of the relative threshold) the absolute threshold for each beam is determined.

In order to have the system react to small signal reductions a higher switching threshold has to be adjusted. The threshold shall not exceed 179 (equivalent to

~70%).

Usage

o Automatic threshold detection o Detection of transparent objects o Reduced beam deflection influence

=> RelThreshold = 0

=> high threshold

=> high threshold

Output assignment

The light curtain has two outputs (wires black and yellow).

The Output functions can be set via the parameter Output assignment.

Output assignment

„normal“

Output Wire Function Description

Out 1

Out 2

Out 1

Out 2

Yellow

Black

Yellow

Black

Signal out light or dark switching

Warning out Active during disruption

Exception

–> Start second range ≠ „0“

Area 1

Area 2 light or dark switching light or dark switching

Output assignment „inverted“

Functions like „normal“ but with switched outputs

Output

Out 1

Wire

Yellow

Function Description

Warning out Active during disruption

Out 2 Black Signal out light or dark switching

Exception

–> Start second range ≠ „0“

Page LA 4of LA 16

Technical information

Light Curtain Type LAII

Out 1

Out 2

Yellow

Black

Area 2

Area 1 light or dark switching light or dark switching

Output assignment „inverted without warning“

Out 1 is without function.

Out 2 is used as Signal out on black wire

Output Wire Function Description

Out 1

Out 2

Out 1

Out 2

Yellow

Black

Yellow

Black

- No function

Signal out light or dark switching

Exception

–> Start second range ≠ „0“

-

Area 1

Output assignment „antivalent “

Out 1 is as Signal out on yellow wire

Out 2 is active when Out 1 is inactive.

No function light or dark switching

OutDelay

This configuration value delays the status change of switching outputs by the set value in milliseconds (ms). Maximum delay value is 255 ms.

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Technical information

Light Curtain Type LAII

Beam variations

Parameter

Description

Diagonal = 0 diagonal beams off

Number of beams

Max beam number (n)

Drawing n

128

Diagonal = 1 diagonal beams on

2n-1

64

Diagonal = 4

Multiple beam crossings

5n-6

26

Recommendations:

o After changing this parameter run a calibration cycle. o The cycle time increases with the number of beams. o A total of 128 logical beams is supported.

Contamination alarm

If the beam brightness remains under a certain threshold (weak signal threshold) for a specific duration (weak signal delay

), the light curtain signals a “simple error“.

Remedy:

Clean the beam output.

Attention: do not damage the front foil. Do not use caustic cleaning agents.

Align the bars and recalibrate.

Recommendations:

Set the weak signal threshold parameter to “0“ in order to switch off the contamination alarm.

Page LA 6of LA 16

Technical information

Light Curtain Type LAII

TopBlankable

When turning on the device interrupted beams and the bar ends can be blanked out permanently.. TopBlankable defines, how many consecutive beams are blanked out.

This function was specifically implemented for elevator systems.

Beam Blanking

Permanently interrupted beams can be blanked automatically. Which identical beams can be blanked is adjusted with the Max.autoblanked parameter.

Max.autoblanked Automatic Blanking

0

1

None each 2. identical beam

2

... each 3. identical beam

...

Defective beams are not considered in the analysis. The parameter Maxdefect defines the number of ignored beams. A serious error is signaled should the number of defective beams exceed the value of Maxdefect.

Blanked out beams are not added to Maxdefect.

Recommendations:

o Use the section Beam Configuration on the right side of the DUO-Konfapplication window in order to manually blank out beams. Select there which receiver element shall be blanked out. o The Syncbeam must always stay active!

Syncbeam – Synchronisation beam

The Syncbeam parameter defines whether the first (near the connectivity point) or the last beam is used for the optical synchronisation.

Recommendations:

o Transmitter and receiver have to be set to the same value. o The Syncbeam cannot be blanked. o Interruption of the Syncbeam is signal on both sections.

Areas

Parameter Start second area separates the light curtain into two areas.

The status of the areas is signaled at outputs OUT 1 and OUT 2.

Recommendations:

o Switching ranges for Diagonal

≠ 0 (=> diagonal beams on) overlap. o Interruption of the Syncbeam is signaled in both areas. o Areas can be configured to be light or dark switching.

Page LA 7 of LA 16

Technical information

Light Curtain Type LAII

NOFDARK

Defines the threshold after which number of interrupted beams the outputs are switched (separately for both areas).

Example

: NofDark1 = ’5’

=> Output of areas 1 switches after 5 interrupted beams in section 1.

Special:

„Start second area“= '1'

Both NofDark-values relate to the entire monitoring range.

After reaching the corresponding number id interrupts the corresponding output is switched.

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Technical information

Light Curtain Type LAII

Configuration values

First Beam

Last Beam

1

Output function

Output assignment

Diagonal

Relative Threshold

Maxdefect

Delay for Autoblanking

Max. Autoblanked

Start for second area

Syncbeam

NofDark1

Standard value xx

Description

1 value always equals 1 value is system dependent

Light switching

Dark switching

 normal inverted inverted without warning antivalent

0 = diagonal beams off

1 = diagonal beams on

2...4 = multiple beam crossings

84

1

60

84 equals 33% (256 equals 100%)

0 = automatic theshold adjustment activ.

Max. number of allowed defective beams

Time in seconds until a beam interruption can be blanked

0

1

Number of consecutive identical beams available for blanking

Beam number defining the start oft he second

0 section.

Only recommended for

„Diagonal = 0“!

 first = synchronisation via first beam last = synchronisation via last beam

Minimum number of interrupted beams defining an interruption. (Area 1)

NofDark2

OutDelay

TopBlankable

Weak signal threshold

1

0

0

147

Minimum number of interrupted beams defining an interruption. (Area 2)

Duration in ms between output state changes.

(range: 0

– 255 ms) number (1,2 or 3) of beams that can be blanked consecutively during power-up.

Threshold for contamination warning. equals 57% (Wert x 256)

Weak signal delay

60

Time in seconds after which a contamination is signaled

AutoCalDelay

Recommendation

o Configuration value

„Syncbeam“ must be identical for Transmitter and

Reciever for the light curtain to work properly.

1

Only the value of physically present beams can be adjusted. A incorrect value can result in improper functionality.

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Technical information

Light Curtain Type LAII

Calibration Sequence

1. Place yellow wire on +24 V DC during activation.

=> self-calibration (other flashing signals as those in normal mode).

2. Both LED of the receiver bar illuminate steady

=> self-calibration is completed without an error.

3. Remove yellow wire as long as LA is still switched on

=> saves sensitivity data.

Example for implementation with standard connectivity (plus switching):

1. Insert a bridge between connection points of yellow wire and brown wire

(plus).

2. Ensure that the entire monitoring range is uninterrupted.

3. Turn on supply voltages.

4. Remove bridge.

Recommendations:

The calibration is important for proper functionality of the light curtain.

Rerun the calibration after each change on the light curtain.

For an error-free calibration the monitoring range must be free of obstacles and both

LEDs on the receiver must light up.

Flashing codes during the calibration cycle

One LED flashes Defective beams

LEDs flash in-phase

Differences too big or not yet calibrated. Verify alignment of bars as well as monitoring range.

LEDs flash out-phase Error during Selftest

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Technical information

Light Curtain Type LAII

LED Indicators / Error Diagnosis

When the light curtain detects a failure, the warning output is enabled and the LED displays one of the following error codes. As soon as the failure is resolved, the output becomes inactive again.

Receiver bar

LED1 off on

LED2 off on

Operating mode off operational

Monitoring area unknown free on flashing off on flashing

Double off

Off flashing flashing flashing

(in phase) flashing flashing

(out of phase) operational simple error simple error

Configuration error fatal error A fatal error B beam interrupted free beam interrupted unknown unknown unknown

Simple error:

Light curtain continues to run with constriction, for example, beam blanked or contamination alarm.

Fatal error:

Light curtain no longer operational.

Transmitter bar

LED off on flashing

Operating mode off operational error

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Technical information

Light Curtain Type LAII

Interfaces / Outputs

M8 connector

View towards connector pins

Installation / Initial Operation

Pay attention to the installation rules (see mounting instructions for light curtain bar pairs).

Avoid optical sensors from mutually affecting each other, even through reflection, because this can lead to malfunction.

Maximal 1.5 secounds after power up the light curtain is operating.

Insulate unused wires.

Disconnect the connections during insulation measurements.

Execute a calibration cycle.

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Technical information

Light Curtain Type LAII

Conformity

The light curtain version LA is compliant and meets all the requirements of the following standards:

EN 61000-6-3:2001.

EN 61000-6-1:2001.

The light curtains are not certified safety lights curtains compliant with EN 61496. They are not safety components in the context of

EU Machine Guideline 89/392/EEC with 93/44/EMW addition,

Appendix 4.

Therefore, they must not be used so as not to endanger individuals.

Technical Data

Light curtain housing

Connection

Transmitter

Receiver

Operating voltage

Power consumption

Outputs

Naturally anodised aluminium, plastic front panel, dark red

(Do not use any cleaning agents containing solvents!)

Securely attached lines 4 m long, precut with wire end ferrules

2-core round cable,

about 4,9 mm (PVC)

4-core round cable,

about 4,9 mm (PVC)

24 V DC (-15%..+20%) with max. ripple 5%, protected against polarity reversal, use polarised earthed power supply! approx. 8 W (total)

Short-circuit-proof semiconductor outputs

PNP (or NPN) switched current max. 200 mA

Operating temperature -10°C to 45 °C

Range

2

~ 0.7 ... 4 m (calibration necessary)

Reduced range default setting: 4m

~ 0.2 … 1 m (calibration necessary)

Response time

Maximum number of

1 ms cycle time per beam plus base time (~4 ms)

128 logical beams beams

2

With standard profile. Range with other profile types see techn. Information light grid bar pairs.

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Technical information

Light Curtain Type LAII

PC-Interface

The PC Interface connects to the serial port of a PC.

Use the Software DUO-Konf for configuration of a light curtain pair.

Plus switching light curtain

Transmitter

brown blue green

Receiver

brown blue black yellow

Minus switching light curtain

Receiver

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brown blue black yellow

Technical information

Light Curtain Type LAII

Ordering Key and Example

Key:

Light curtain bar pair

Consisting of receiver and transmitter bar

Type Beam Number /

Beam Separation

„LA“

Choose from beam seperation between

5mm and 112 mm.

Mechanical

Choose from 4 shapes and 8 mounting options

Options

Color

Cable length

Connectivity option

Front cover

….

For details regarding the specific ordering codes refer to detailed light curtain bar document

.

Example

LA16/112-2000A Light curtain bar pair with integrated controler unit

(24 Vdc, PNP)

16 beams

Beam spacing of approx. 112 mm

Bar length 2000 mm, bar cross-section 12x24 mm,

Aluminium naturally anodized

4 bolts on top, cone on the bottom

Protection class IP54

Parameterisation: standard*)

LA24/12,5-510I Light curtain bar pair with integrated controler unit

(24 Vdc, PNP)

24 beams

Beam spacing of approx. 12,5 mm

Bar length 510 mm, bar cross-section 12x24 mm,

Aluminium naturally anodized

2 M4x10 threaded stud bolts spaced 400 mm apart

Protection class IP54

Parameterisation:

dark

diagonal beams

*) Default values can be found in the configuration table. Please mention different parameterisations in your purchase order.

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Technical information

Light Curtain Type LAII

Accessories

LCPower/2

FP-110-00001

LCPower/2-SR

FP-110-00002

Programminginterface LA

FP-20-13538

Power Supply(24Vdc) for types LC/LA/LT

- 230/110 Vac

- plastic housing

- Protection class IP65

- Relais

Power Supply(24Vdc) for types LC/LA/LT

- 2xRelaisoutput

- connections via PG 9

- internal connection via terminal block

- plastic housing

- buzzer

Programming interface for plus- and minus switching systems

Including connection wires

DUO_Konf-Software for Download: http://www.duometric.com/Dokus/LA/

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