SICK DMT-2/DML-2, Profibus, RS 232, RS 422 Operating instructions
- Category
- Measuring, testing & control
- Type
- 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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© SICK AG · Germany · Subject to change without notice 3
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
DMT10-2/DML40-2
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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
Off
Off
Off
Device switched off or defective
Switch on
On
On
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
Off
Off
Off
Device switched off or defective
Switch on
On
On
On
On
LED test for 1 second after device is switched on
Wait
Off
Off
Off
On
Error during self-test
Contact
manufacturer
Off
Off
On
Off
The DMT10-2/DML40-2 is operational and awaits
parameterization and configuration by the Profibus
DP Master.
Off
On
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
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
0
Scaling factor
1.000
1.000
Rain-filter *
only available at
DMT10-2-2X11
Off
DISTECHO = On
Off
DISTECHO = On
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© SICK AG · Germany · Subject to change without notice 15
Setting options
RS232/RS422
Profibus
Ambient data
(5.3.4)
Air temperature [°C]
20.0
20.0
Air pressure [hPa]
1013
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
16 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30
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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© SICK AG · Germany · Subject to change without notice 17
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
18 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30
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
© SICK AG · Germany · Subject to change without notice 19
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
20 © SICK AG • Germany • Subject to change without notice 8011242/ZMK5/2017-05-30
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
- Category
- Measuring, testing & control
- Type
- Operating instructions
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