SICK DMT-2/DML-2, Profibus, RS 232, RS 422 Operating instructions

DMT-2, DML-2

Profibus, RS 232, RS 422

Distance measuring device

O P E R AT I N G

I N S T R U C T I O N S

DMT10-2/DML40-2

2 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30

1 Use in Accordance with Regulations ......................................................................................... 4

2 Safety Notes ................................................................................................................................. 4

3 Connection ................................................................................................................................... 5

3.1 DMT10-2-1111,1113,2111/DML40-2-1111 (RS 232/RS 422) ................................................. 5

3.1.1 View of Plug Cover ............................................................................................................................... 5

3.1.2 Cable shield connection ..................................................................................................................... 5

3.1.3 Connection of the supply lines ........................................................................................................... 6

3.1.4 Connection of the Digital Switching Outputs Q1 and Q2 (open collector) ....................................... 6

3.1.5 Connection of the analogue output ................................................................................................... 7

3.1.6 Connection of the RS 232/RS 422 Interface .................................................................................... 7

3.2 DMT10-2-1211,1213,2211/DML 40-2-1211 (Profibus) .............................................................. 8

3.2.1 Supply Voltage Connection ................................................................................................................. 8

3.2.2 Profibus Connection ............................................................................................................................ 8

3.2.3 Connection RS232 .............................................................................................................................. 8

4 Assembly and Alignment ............................................................................................................ 9

4.1 Alignment ........................................................................................................................................ 9

4.2 Outdoor installation ........................................................................................................................ 9

4.3 Recommendations for front pane dimensions for a protective housing .................................. 10

4.4 LED Display ................................................................................................................................... 11

4.4.1 RS 232/RS 422 ................................................................................................................................ 11

4.4.2 Profibus.............................................................................................................................................. 11

5 Operation Startup ...................................................................................................................... 12

5.1 Installation and Start of the Setup Program .............................................................................. 12

5.2 Operating the setup program ...................................................................................................... 13

5.2.1 Graphic window ................................................................................................................................. 13

5.2.2 Configuration window ....................................................................................................................... 14

5.3 Serial interface ............................................................................................................................. 16

5.3.1 Output format .................................................................................................................................... 16

5.3.2 Data output ....................................................................................................................................... 16

5.3.3 Correction values .............................................................................................................................. 17

5.3.4 Ambient data ..................................................................................................................................... 17

5.3.5 Filter ................................................................................................................................................... 17

5.3.6 Analogue output configuration ......................................................................................................... 18

5.3.7 Analogue output ON/OFF ................................................................................................................. 18

5.3.8 Digital switching outputs .................................................................................................................. 19

5.3.9 Saving and loading of the configurations ........................................................................................ 20

5.3.10 Recorder ....................................................................................................................................... 20

5.3.11 Display settings: ........................................................................................................................... 21

6 Profibus ...................................................................................................................................... 22

6.1 Setting the slave address ............................................................................................................ 22

6.2 Input data format .......................................................................................................................... 22

DMT10-2/DML40-2

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6.3 Input/output data format and command procedure ................................................................. 22

6.4 DMT10-2/DML40-2 Commands and statuses ........................................................................... 23

6.5 Output data format ....................................................................................................................... 24

6.6 Diagnosis format .......................................................................................................................... 24

7 Program-controlled configuration with configuration codes ................................................ 26

7.1 Basic structure of a configuration code ..................................................................................... 26

7.2 List of configuration codes .......................................................................................................... 27

7.3 Configuration overview ................................................................................................................ 28

8 Measurement configuration ..................................................................................................... 29

9 Troubleshooting ......................................................................................................................... 31

9.1 Data output malfunctions RS 232 ............................................................................................... 31

9.2 Malfunction display of the LED RS232/RS422 ......................................................................... 31

9.3 Malfunction display of the LED for the Profibus ........................................................................ 32

9.4 Measurement problems with the Profibus ................................................................................. 32

10 Specifications .................................................................................................................. 33

11 Dimensional drawings ..................................................................................................... 35

11.1 Dimensional drawing of DMT10-2-1111,1113,2111 and DML40-2-1111 RS232/RS422 ... 35

11.2 Dimensional drawing of DMT10-1211,1213,2211 and DML40-1211 Profibus ...................... 36

12 Accessories ...................................................................................................................... 37

12.1 Triple prism for DML ..................................................................................................................... 37

12.2 Triple prism with heater DML ...................................................................................................... 37

12.3 Combi-reflector PL 880 FS01 ...................................................................................................... 37

12.4 Reflector PL 880 DG ..................................................................................................................... 37

12.5 Reflector PL 560 DG ..................................................................................................................... 38

12.6 Joint bracket for DMT10-2 / DML40-2........................................................................................ 38

13 Maintenance .................................................................................................................... 38

DMT10-2/DML40-2

4 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30

1 Use in Accordance with Regulations

The DMT10-2/DML40-2 is a compact optical distance sensor. It measures the distance to an object or

reflector based on the principle of time of flight measurement. Typical applications include filling level

measurements and slab measurements (DMT) or the positioning of rail mounted vehicles such as storage

and retrieval units or cranes (DML).

2 Safety Notes

This is not a safety component in accordance with the EU Machine Guidelines.

Read the operating instructions before starting operation.

Only trained professionals should perform connection, assembly and settings.

Protect the device against moisture and contamination when operating.

Observe suitable ESD protection measures during installation.

DML40-2

DMT10-2

Class 1 laser product

EN/IEC 60825-1:2014

Identical laser class for issue EN/IEC 60825-1:2007

Class 1 laser product

EN/IEC 60825-1:2014

Identical laser class for issue EN/IEC 60825-1:2007

Measuring laser: Measuring laser:

Maximum power rating Pmax 8 W Maximum power rating Pmax 30 W

Pulse duration tp 6 ns Pulse duration tp 7 ns

Wavelength λ 905 nm Wavelength λ 905 nm

Marking laser: Marking laser:

Maximum power rating Pmax 0.39 mW Maximum power rating Pmax 0.39 mW

Wavelength λ 650 nm Wavelength λ 650 nm

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3 Connection

3.1 DMT10-2-1111,1113,2111/DML40-2-1111 (RS 232/RS 422)

3.1.1 View of Plug Cover

1. PG 9 cable feed-through

2. Sub D 9 cable connector for the data interface

3. Terminal block in plug cover

4. DIP switch for data lines

5. Internal connection between plug cover and

DMT10-2/DML40-2

3.1.2 Cable shield connection

Use a shielded and twisted paired cable for the terminal strip (3) and connect the cable shield through the

shortest path possible to the screw terminal in the plug cover.

DMT10-2/DML40-2

Switch cabinet

Supply

e.g.

RS 232

e.g.

24 V

Plug cover

Evaluation

1

Place the shield as close as possible to the supply/evaluation unit.

2

Strip the cable and connect the shield to the ground rail over a large area.

3

Connect the shield in the metallic or metallized plug (Sub-D) over a large area.

4

Connect shield end to the grounding screw at the shortest distance possible.

1

2

3

4

5

DMT10-2/DML40-2

6 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30

3.1.3 Connection of the supply lines

The supply lines are connected to the terminal block in the plug cover.

The DMT10-2/DML40-2 requires direct voltage from 18 to 30 VDC with typ. 6 watt power consumption.

Terminal

Assignment

Significance

1

L+

+24 V DC

2

M

0 V

3

–

4

–

5

–

6

–

7

–

8

–

3.1.4 Connection of the Digital Switching Outputs Q1 and Q2 (open collector)

5

3/4

6

Load

Terminal

Assignment

Significance

1

–

2

–

3

Q1

Switching output Q1

4

Q2

Switching output Q2

5

L+/Q

External voltage

5 to 30 V DC.

Supply only with

PELV* voltage

6

M/Q

Signal ground

7

–

8

–

* PELV: Protective Extra Low Voltage (see EN

50178)

Imax = 100 mA

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3.1.5 Connection of the analogue output

When using the analogue output, only Q1 remains to be used as distance-dependent switching output. In

the case of invalid measuring results ("No echo"), Q2 has the function of an error output.

5

4

6

7

R

M

Load

Terminal

Assign-

ment

Significance

1

–

2

–

3

–

4 Q2

Error output "No echo"

Max. 100 mA

5 L+/Q

External voltage

5 to 30 VDC for Q2

Supply only with PELV

voltage*

6

M/Q

Signal ground

7

QA

Analogue output

8

–

• * PELV: Protective Extra Low Voltage (see EN

50178)

• RM : max 450 Ohm

Time constants analog output QA: 500ms (5 dew,

approx. 99% of final value)

i

Note:

Time constants analog output QA:

500ms (5 dew, approx. 99% of final

value)

3.1.6 Connection of the RS 232/RS 422 Interface

Sub D 9 Connector

Jack on

DMT10-2/DML40-2

DIP switch setting

Switch 2

OFF

Switch 1

ON

Setting for RS 232

Switch 1

OFF

Switch 2

ON

Setting for RS 422

Signal

Inter-

face

Significance

1 RESET Hardware Reset

2

RxD

RS 232

Sensor input

3

TxD

RS 232

Sensor output

4 – – –

5

GND

Signal ground

6

Tx +

RS 422

Output

7

Tx –

RS 422

Output

8

Rx +

RS 422

Input

9

Rx –

RS 422

Input

i

Note:

DIP switch S1. 4 activates the signal RESET in the ON position.

The signal RESET is deactivated in the OFF position.

Set S1.4 to OFF (factory setting) to avoid unintentional reset.

!

Warning:

Configure either the RS 232C or the RS 422 interface on the DMT10-2/DML40-2 but never use

both interfaces together since this may cause defects in the device. Profibus and RS 232

interfaces are only separated with respect to potential via the power supply (24 V).

DMT10-2/DML40-2

8 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30

3.2 DMT10-2-1211,1213,2211/DML 40-2-1211 (Profibus)

3.2.1 Supply Voltage Connection

Terminal

Assign-

ment

Significance

1

L+

+24 V (DC)

2

M

0V

3.2.2 Profibus Connection

Jack on DMT10-2/DML40-2

Signal

Significance

1 – –

2

–

3 B

Profibus line B (RXD/TXD

+)

4 RTS

Control signal (Direction

detection for optical

waveguide)

5

GND

Signal ground

6 +5 V

With reference to GND, pin

5

7

–

8

A

Profibus line A (RXD/TXD -)

9

–

3.2.3 Connection RS232

Pin plug on DMT10-2/DML40-2

Signal

Significance

1 nRESET

Reset Input (Hardware

Reset)

2

RxD

RS 232 Input

3

TxD

RS 232 Output

4

–

5

GND

Signal ground

6

–

7

–

8

–

9

–

!

Warning:

Profibus and RS 232 interface are only potential-separated against the supply voltage.

Profibus and RS 232 interface are not potential-separated from each other. Pin 5 (GND) or both

plug connectors are connected in the device.

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4 Assembly and Alignment

4.1 Alignment

Connect the DMT10-2/DML40-2 with the computer.

Switch on the 24 V DC supply voltage.

Switch on the laser pointer using the setup program (see chapter 5).

The dot marked in red is positioned 30 mm (+/- 1 mm) above the actual measuring point.

(Specs. +/-1 mm)

Neutral point of device

To avoid faulty measurements, a minimum distance must be observed towards lateral objects (see

diagram):

0

200

400

600

800

1000

1200

1400

1600

1800

2000

1 10 100 1000

Distance [m]

Minimum distance [mm]

Perpendicular measurements on reflective surfaces or shiny metals are to be avoided with sensors of the

DMT10-2-2111 and DMT10-2-2211 series, as this can lead to spurious or invalid measurements (due to

self-dazzling). When measurements are carried out at an angle to the reflective surface the measurement

beam can be deflected and reflected from the objects into the surrounding area. This can influence the

measurement results.

4.2 Outdoor installation

i

Notes:

When mounted outdoors, a housing must be used to protect the sensor from direct environmental

effects. The device must be operated within the specified temperature range and protected

against damp precipitation.

See also Chapter 4.3.

DMT10-2/DML40-2

10 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30

4.3 Recommendations for front pane dimensions for a protective housing

i

Notes:

- Apply anti-reflective coating for 905 nm

- Tilt front pane against axis of beam

- The inside of the housing must not contain any reflective surfaces.

- It is recommended to coat the inside of the housing with a non-gloss black varnish.

- The beam reflected by the front pane must generally not hit well-reflecting objects in the

surroundings since this may create a "virtual" target hitting a surface at a distance that can

no longer be suppressed

- Activate the nearfield suppression ( ref. 5.3.5 ).

Comparing the distance of the pane to the minimum angle of the pane

0

5

10

15

20

25

30

35

40

0 50 100 150 200 250

Distance sensor-reference <-> pane [mm]

Minimum tilt angle [°]

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4.4 LED Display

4.4.1 RS 232/RS 422

The status of the measurement and the states of the switching outputs are displayed via the 4 LEDs on the

front of the DMT10-2/DML40-2

.

Status indicator

Yellow

(Q1)

Yellow

(Q2)

Green

Red

Significance

Troubleshooting

Off

Device switched off or defective

Switch on

On

LED test for 1 second after device is switched on

Wait

On

Off

The DMT10-2/DML40-2 is ready to operate.

Previous measurements were terminated.

Start measurement

Blinks

Off

Measurement in progress

Blinks

On

No target contact

Focus on target

On

Switching output Q1 is active

On

Switching output Q2 is active

Off

On

Error during self-test

Contact

manufacturer

Blinks

Operating temperature range exceeded or fallen

short of, also blinks in stand-by operation

Lower or increase

outside

temperature

4.4.2 Profibus

The status of the measurement and the states of the switching outputs are displayed via the 4 LEDs on the

front of the DMT10-2/DML40-2.

Status indicator

Yellow

(Q1)

Yellow

(Q2)

Green

Red

Significance

Troubleshooting

Off

Device switched off or defective

Switch on

On

LED test for 1 second after device is switched on

Wait

Off

On

Error during self-test

Contact

manufacturer

Off

On

Off

The DMT10-2/DML40-2 is operational and awaits

parameterization and configuration by the Profibus

DP Master.

Off

On

Off

The DMT10-2/DML40-2 is in the data exchange

state. Parameterization and configuration are

successfully completed.

Start measurement

Blinks

Off

Measurement in progress

Blinks

On

No target contact

Focus on target

Blinks

Operating temperature range exceeded or fallen

short of also blinks in stand-by operation

Lower or increase

outside

temperature

DMT10-2/DML40-2

12 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30

5 Operation Startup

The scope of delivery includes a CD containing the setup program for the configuration of the DMT10-

2/DML40-2.

You will need the following to use the setup program:

A computer with an available RS232 interface

Windows 98, Windows ME; 32 MB RAM, 64 MB RAM recommended

Windows NT 4.0; 32 MB RAM, 64 MB RAM recommended

Windows 2000 Pro; 64 MB RAM, 128 MB RAM recommended

Windows XP or Windows XP Pro; 128 MB RAM, 256 MB RAM recommended

Windows 7

Resolution 800 x 600 with 256 colors

Users of Windows NT, Windows 2000, Windows XP/XP Pro and Windows 7 must possess administrator

rights to perform the installation.

i

Note:

Windows 98/XP contains the terminal program „HyperTerminal“, which can also be used to

operate the DMT10-2/DML40-2. The pertaining description can be found in chapter 7.

5.1 Installation and Start of the Setup Program

1. Switch the DMT10-2/DML40-2 off.

Connect the serial interfaces of the computer and

DMT10-2/DML40-2 with the zero-modem cable,

part no. 2014054.

2. Insert the CD supplied into the CD drive of your

computer.

3. Start the program „DMT2_DML2_setup.exe“ on the

CD and follow the instructions of the installation

program. Start the program after the successful

installation.

4. Select the serial RS 232 interface to which the

sensor is connected. Select the transfer rate of the

DMT10-2/DML40-2 (Factory setup 9600 baud).

5. Now switch the DMT10-2/DML40-2 on. Wait until

the green LED at the sensor lights.

6. The measurement begins by pressing the "Start"

button in the graphic window.

i

Note:

A change of the baud rate only becomes effective after switching the sensor off and on again. The

setup program remembers the baud rate set last.

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5.2 Operating the setup program

5.2.1 Graphic window

Setting options

RS 232/RS 422

Profibus

Serial interface

COM port

COM 1

COM 2 to COM 255

COM 1

COM 2 to COM 255

Baud rate in bits/s

1200

2400

4800

9600

19200

38400

1200

2400

4800

9600

19200

38400

DMT-2/DML-2

Averaging depth

1

16

64

256

1024

1

16

64

256

1024

Moving average

Inactive

Active

Inactive

Active

Red marking laser

Inactive

Active

Inactive

Active

Measurement

Start button

Start/Stop

Status indicator

Red: No contact to sensor

Yellow: Standby; Contact to

sensor

Green: Measurement in

progress

Red: No contact to sensor

Yellow: Standby; Contact to

sensor

Green: Measurement in

progress

Measuring value

Displays the measuring value

numerically

Displays the measuring value

numerically

Temperature

Displays the temperature in

the laser and indicates as

status (e.g. "OK")

Displays the temperature in

the laser and indicates as

status (e.g. "OK")

Temperature query

during measurement

Inactive

Active

Inactive

Active

* Factory settings are shown in bold

DMT10-2/DML40-2

14 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30

5.2.2 Configuration window

* only available at DMT10-2-2111 and DMT10-2-2211

Setting options

RS 232/RS 422

Profibus

Select

configuration

Configuration

Device

Stored configurations

Device

Stored configurations

Source

Device

Path of the stored

configuration

Device

Path of the stored

configuration

Serial interface

(5.3.1)

(5.3.2)

Baud rate in bits/s

1200

2400

4800

9600

19200

38400

1200

2400

4800

9600

19200

38400

Data output

Continuous

Single

On request

Continuous

Output format

ASCII

ASCII + unit

Binary

Binary + CRC

ASCII

ASCII + unit

Binary

Binary + CRC

Measuring unit

Millimeter

Meter

Inch

Foot

Yard

Mile

Nautic Mile

Millimeter

Meter

Inch

Foot

Yard

Mile

Nautic Mile

Profibus address

Not active with RS

232/422

0 - 125

Correction

values (5.3.3)

Offset [mm]

0

Scaling factor

1.000

Rain-filter *

only available at

DMT10-2-2X11

Off

DISTECHO = On

Off

DISTECHO = On

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Setting options

RS232/RS422

Profibus

Ambient data

(5.3.4)

Air temperature [°C]

20.0

Air pressure [hPa]

1013

Setting

Autostart

Inactive

Active

Inactive

Active

Filter (5.3.5)

Moving average

Inactive

Active

Inactive

Active

Averaging depth

1

16

64

256

1024

1

16

64

256

1024

Timeout

0% (infinite)

25%

50%

100%

200%

0% (infinite)

25%

50%

100%

200%

Automatic echo evaluation

Inactive

Active

Inactive

Active

Nearfield suppression

Inactive

Active

Inactive

Active

Analogue output

(5.3.6)

Analogue output

Inactive

Active

Not available

Distance @ 4 mA

[mm]

1000

Not available

Distance @ 20 mA

[mm]

9000

Not available

Switching logic Q2

Positive

Negative

Not available

Switching

outputs (5.3.7)

Switching logic Q1

Positive

Negative

Not available

ON Threshold value Q1

[mm]

10000

Not available

OFF Threshold value Q1

[mm]

9900

Not available

Switching logic Q2

Positive

Negative

Not available

ON Threshold value Q2

[mm]

1000

Not available

OFF Threshold value Q2

[mm]

900

Not available

* Factory settings are shown in bold

DMT10-2/DML40-2

i

Note:

When setting an offset, switch to automatic axis adjustment or adapt the manual axis adjustment.

Configuration changes only become effective after "Send configuration to DMT/DML" (temporary)

has been executed. "Store setting permanently" must be executed for the non-volatile storage.

5.3 Serial interface

5.3.1 Output format

ASCII

ASCII text can be displayed and read directly on the screen. One character is transmitted for each number.

Each transmitted line ends with a carriage return (ASCII 13) and line feed (ASCII 10).

ASCII + unit

Apart from the ASCII text, the unit of measure can also be transmitted in this format.

Binary

The binary measuring values are output in 4 byte LONG INTEGER format.

The distance information items are output as 32 bit binary; the LSB is thereby transmitted first.

When using the data output in binary format, the "Request Mode" is the best method to control the data

flow and to prevent data overflow into the connected PLC.

Binary + CRC

Each record is supplemented by a CRC 16 checksum (standard: ITU.T X25, Polynom 1021hex).

0xFFF is used as starting value. The CRC calculation must be performed through the complete value

including CRC and must render 0.

5.3.2 Data output

Continuous Mode

Continual measurement with continuous data output

.

Single Mode

Individual measurement. The command "M" starts the measurement. The measurement is stopped again

following the output of the measuring value.

Request Mode

The request mode means that the sensor constantly measures internally thus providing current values but

the output via the interface only takes place upon request.

The request mode must be activated in the setup menu.

Initially, the internal measurement must be started using the command "M".

Subsequently, individual measurement values can be invoked as needed, using the command "G" (Get

measurement).

The internal measurement is stopped using the command "S".

In addition, the sensor can also be set with the setup menu for "Autostart".

After applying the supply voltage to the sensor, the internal measurement starts automatically; data output

only takes place upon request using the command "G".

DMT10-2/DML40-2

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5.3.3 Correction values

Offset/Scaling factor

Setting the zero point and scaling factor.

The zero point of the DMT10-2/DML40-2 is located on the front varnished housing surface.

The zero point can be moved by entering an offset and the measured distance can be scaled by a scaling

factor:

omdD +⋅=

with

D = corrected distance

d = measured distance

m = scaling factor set by the user (scale)

o = zero point set by the user (offset)

Rain filter

Measurements can be affected by rain during outdoor operation.

DMT10-2-2111 and DMT10-2-2211 sensors, that are equipped with electronic compensation, have a rain

filter that can be switched on and which suppresses weak echos up to a distance of 15 m – thus largely

cutting out any effect caused by rain.

The capability of making measurements on dark targets in line with specifications is retained.

5.3.4 Ambient data

Setting the ambient conditions.

The travel time of the light depends on the air pressure and the temperature. Both factors may impact the

distance measurement. A significant impact only occurs with extreme environmental conditions or

distances in the kilometer range. We therefore recommend keeping the factory set values unchanged.

5.3.5 Filter

Moving average

ON = Moving average

OFF = Block by block evaluation of the measuring values

A mean value formation serves to improve the measured value statistics since the individual

measurements are subject to straggling.

Block by block averaging is a summarization of a series of individual measurements divided by the number

of the individual measurements. Subsequently, the individual measurements are determined for the next

mean value block. The results of the previous measurements are rejected.

The number of individual measurements entering the mean value formation is used to determine the

quality of the statistics but also the output rate. A high quality signifies a low measuring rate.

Block by block averaging is recommended for applications with rapidly changing distances.

In case of the moving average value formation, the oldest value is replaced by a current measurement

value. Each individual measurement thereby already produces results.

This method is especially suitable for linear distance changes, e.g., as with crane positioning.

Averaging depth

Number of the measured values used to averaging an output value.

A large number means a high quality of the statistics with a small scattering but low data output with block

by block averaging, or a slurring of the measurement in case of the floating mean value formation

depending on the repositioning speed.

DMT10-2/DML40-2

Timeout

The DMT10-2/DML40-2 performs an automatic evaluation of the reflected signal. If the signal is too strong

or too weak and the automatic aperture has not yet positioned the incident signal into the work area, then

the measuring result can be noisy and therefore inaccurate. The DMT10-2/DML40-2 will then report an

invalid internal measurement.

The TimeOut setting reflects a percentage to the setting of the averaging depth and renders the maximum

number of invalid measurements. If this threshold is exceeded then the output will cause a "No echo"

message.

With some measuring situations, e.g., the flickering of the air between the sensor and the measuring target,

increasing the time-out value can facilitate a measurement.

With situations where monitoring of the measuring capability is important, a small time-out value can

facilitate rapid reaction to an interruption of the measurement.

Automatic echo evaluation

In some borderline situations, e.g., in case of highly dynamic measurements, these measurement results

are already desired if the automatic mechanical aperture has possibly not yet sufficiently vaporized to

deliver a clean signal for accurate measurement. For these cases, the automatic echo evaluation can be

deactivated for echo amplitudes that are too large. However, measurements that are too large can lead to

accuracy variations and yet, because the aperture immediately regulates the value, the subsequent

measurements are once more accurate. Small echo amplitudes continue to be monitored.

Nearfield suppression

Nearfield suppression facilitates the use of a front pane in a protective housing. Optical interference’s in

the short range, which can already lead to faulty measurements because of even slight contaminations, are

effectively suppressed. This increases the interval required for cleaning the pane.

The Nearfield suppression changes the measuring behavior. The specified data are reached starting at a

distance of 2.0 m. Without Nearfield suppression, the specified data are valid in the entire measuring area

.

5.3.6 Analogue output configuration

Distance @ 4 mA (min.)

Lower threshold value of the desired measurement range in [mm].

Minimum distance between MIN and MAX: 1000 mm.

Distance @ 20 mA (max.)

Upper threshold value of the desired measurement range in [mm].

Minimum distance between MIN and MAX: 1000 mm.

Note: The last valid measured value will be output in the event of invalid measured values (i.e. "no Echo").

The 2nd Switching output is used to indicate that the measured value is invalid in the event that the value

is out of the scaled range or no measurement is possible with insufficient or excessive echo. It is

recommended to monitor the switching output. In order to do so, an input must be assigned on the PLC or

IPC.

5.3.7 Analogue output ON/OFF

Remark: When the analogue interface is switched on, the switching output Q2 is used to output "No echo" if

the defined measurement range is exceeded or fallen short of. Q2 can no longer be freely configured.

DMT10-2/DML40-2

8011242/ZMK5/2015-05-30

5.3.8 Digital switching outputs

Definition of the switching on and off thresholds as well as the switching logic of the two digital switching

outputs. The distance between the switching thresholds must be at least 10 mm. The distance shall be

increased accordingly in case of small filter settings.

The following applies with positive switching logic: Q1

ON

> Q1

OFF

Switching hysteresis

The following applies with negative switching logic: Q1

ON

< Q1

OFF

Switching hysteresis

DMT10-2/DML40-2

5.3.9 Saving and loading of the configurations

Applies only to the operation with the setup program.

Performing factory settings:

Resets all parameters to the factory-set parameters.

Permanent storage of settings:

Saves the modified data in a file.

Sending configuration to the sensor:

Sends the modified configuration data to the sensor.

Loading configuration from the sensor:

Loads the data stored in the sensor.

Import

Loads the data permanently stored in a file.

5.3.10 Recorder

Setting options

RS232/RS422

Profibus

Left button

Start recording

Active: red

Inactive: black

Active: red

Inactive: black

Center button

Stop recording

Active: black

Inactive: grey

Active: black

Inactive: grey

Right button

Play recording

Active: black

Inactive: grey

Active: black

Inactive: grey

The data are automatically stored on the hard disk after stopping the recording.

Click on the right button to play. All recorded data sequences will then appear.

i

Note:

Automatic scaling is selected when playing the measuring values with the recorder.

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SICK DMT-2/DML-2, Profibus, RS 232, RS 422 Operating instructions

SICK DMT-2/DML-2, Profibus, RS 232, RS 422 Operating instructions

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