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DS2
User Manual
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IDEC DS2 User Manual

DS2 series Instruction manual

INDEX

1. GENERAL INFORMATION..................................................................................................................... 1
1.1. General description of the AREAscan
TM
light grid............................................................................ 1
2 INSTALLATION MODES ........................................................................................................................4
2.2.1. Minimum installation distance ................................................................................................ 4
2.2.2. Minimum distance from reflecting surfaces ........................................................................... 5
2.2.3. Installation of several adjacent light grids .............................................................................. 6
3. MECHANICAL MOUNTING .................................................................................................................... 7
4. ELECTRICAL CONNECTIONS...............................................................................................................8
5. FUNCTIONING MODES........................................................................................................................ 10
6. FUNCTION AND PROGRAMMING SELECTION................................................................................. 12
6.1.1. Teach-in with detection ........................................................................................................ 14
6.1.2. Absolute detection mode ..................................................................................................... 15
6.1.3. Relative detection mode ...................................................................................................... 16
6.2.1. DS2 user interface – General information ........................................................................... 18
6.2.2. Program installation .............................................................................................................19
6.2.3. Graphic user interface..........................................................................................................20
6.2.4. Connection with AREAscanTM DS2 series........................................................................... 20
6.2.5. Configuration of the AREAscanTM DS2 series ..................................................................... 24
6.2.6. File saving of the configuration options ............................................................................... 29
6.2.7. File loading of the configuration options ..............................................................................29
7. AREASCANTM DS2 SERIES – COMMUNICATION PROTOCOL........................................................30
7.1.1 Binary data packet structure ................................................................................................30
7.1.2. Short protocol binary data packet structure ......................................................................... 30
7.1.3. ASCII data packet structure ................................................................................................. 30
7.2.1. Packet description................................................................................................................31
7.3.1 Host appropriation procedure of the bus ............................................................................. 34
7.3.2 Command packet description: .............................................................................................35
8. DIAGNOSTIC FUNCTIONS AND LED INTERFACE ERROR SIGNALLING ...................................... 41
9. CHECKS AND PERIODICAL MAINTENANCE.................................................................................... 42
10. TECHNICAL DATA ............................................................................................................................... 43
11. LIST OF AVAILABLE MODELS ........................................................................................................... 44
12. OVERALL DIMENSIONS ...................................................................................................................... 44
Instruction manual DS2 series

1. GENERAL INFORMATION

1.1. General description of the AREAscan
TM
light grid
The AREAscanTM light grids are multibeam optoelectronic devices that can be used to detect objects, including small and transparent targets as well as for measurement detection. The variety of functions implemented make the DS2 a particularly flexible device that suits many different applications.
The AREAscan
TM
light grids of the DS2 series are manufactured in accordance with the international
Standards in force and in particular:
CEI EN 60947-5-2: low voltage proximity devices
CEI EN 50319: proximity switches: requirements for proximity switches with analogue
output
The device, consisting of emitter and receiver units housed inside sturdy aluminium profiles, generates infrared beams that detect any object positioned in the light grid’s detection field. The command and control functions are inside the two units; the connections are made through M12 connectors located in the lower side of the profiles. The synchronisation between the emitter and the receiver takes place via cable through direct connection between the two units. The control and management of the emitted and received beams are guaranteed by microprocessors. The operator obtains information relative to the light grid status and error conditions through LEDs located on the device and/or through the control interface of a remote PC.
Some parts or paragraphs of this manual, containing important information for the operator, are proceeded by a note:
Notes and detailed descriptions about particular characteristics of the AREAscan been added to better explain functioning.
DATASENSOR Technical Support is available for questions related to the functioning and installation of the DS2 series light grids and for any information and/or suggestions necessary for a correct installation (see section 9 “Checks and periodical maintenance”).
AREAscan
TM
ARE NOT safety devices; the use of the device for safety purposes and operator
safeguarding is not conform and dangerous.
TM
devices have
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DS2 series Instruction manual

1.2. Selecting the device

The selection of the correct device version is linked to the detection area needed, which is considered as the sensitive area height of the device as well as to the maximum operating distance, considered as the distance between the emitter unit (TX) and receiver unit (RX) and optics interaxis.
Versions are available:
DS2-05-07-015-JV
DS2-05-07-030-JV
DS2-05-07-045-JV
DS2-05-07-060-JV
DS2-05-07-075-JV
DS2-05-07-090-JV
DS2-05-07-105-JV
DS2-05-07-120-JV
DS2-05-07-135-JV
DS2-05-07-150-JV
DS2-05-07-165-JV
Operating distance Detection field
5m
5m
5m
5m
5m
5m
5m
5m
5m
5m
5m
21 beams; h=150mm 6.75mm
42 beams; h=300mm
63 beams; h=450mm
84 beams; h=600mm
105 beams; h=750mm
126 beams; h=900mm
147 beams; h=1050mm
168 beams; h=1200mm
189 beams; h=1350mm
210 beams; h=1500mm
231 beams; h=1650mm
interaxis
6.75mm
6.75mm
6.75mm
6.75mm
6.75mm
6.75mm
6.75mm
6.75mm
6.75mm
6.75mm
DS2-05-25-045-JV
DS2-05-25-060-JV
DS2-05-25-075-JV
DS2-05-25-090-JV
10m 18 beams; h=450mm 25mm 10m
10m
10m
24 beams; h=600mm 25mm
30 beams; h=750mm 25mm
36 beams; h=900mm 25mm
The functions characterising the DS2 AREAscan
TM
light grids are available on all the versions that
consequently have the same operating modes.
The specific technical characteristics (e.g. resolution, sensitivity etc) remain the same for all the versions, until differently indicated.
For food industry applications, please verify with DATASENSOR Technical Support the compatibility of the materials of the light grid shell with the eventual chemical agents that are used in the production process.
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Instruction manual DS2 series

1.3. Typical applications

The following images supply an overview on some main applications.
Object detection and measurement on conveyor belt
Loop control and positioning (also transparent material)
Control of the correct material positioning (opaque and transparent) during functioning (plastic, metal, paper etc)
Detection of objects with different shapes in the food industry
Detection of objects in different positions (parallel beams)
Detection of slots and holes in different positions
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DS2 series Instruction manual

2 INSTALLATION MODES

2.1. Precautions to be observed for the choice and installation of the device

• The dimension of the smallest object to be detected should not to be lower than the resolution level of the device.
• The DS2 should be installed in a place compatible with the technical characteristics (see section 10 “Technical Data”) of the AREAscan
TM
light grids.
Other considerations:
- avoid installation near very intense and/or flashing light sources, in particular near the receiver unit.
- strong electromagnetic interference can compromise the correct functioning of the device. Please contact DATASENSOR Technical Service when this problem occurs.
- the operating distance of the device can be reduced in the presence of smog, fog or airborne dust.
- a sudden change in environment temperature, with very low minimum peaks, can generate a small condensation layer on the lenses and jeopardise functioning.
- relevant variations of the power supply can reduce the operating distance of the device.

2.2. General information on device positioning

• Place the device near the detection area.
• Align the receiver (RX) and emitter (TX) units in order that they are the most parallel possible.
Verify that the green receiver LED is on (stability condition), otherwise slight adjustments of both units have to be made in order to reach the stability position.
• Fix the receiver and emitter units on rigid supports not conditioned by strong vibrations using specific fixing brackets (see section 3 “Mechanical mounting”)
• Check that the distance between the receiver and emitter units is within the device operating distance (see section 10 “Technical data”)

2.2.1. Minimum installation distance

The minimum installation distance corresponds to the minimum operating distance = 0.3 m.
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Instruction manual DS2 series

2.2.2. Minimum distance from reflecting surfaces

Reflecting surfaces placed near light beams of the AREAscanTM device (over, under or laterally) may cause passive reflections that can compromise the detection of an object inside the controlled area (see Fig.1).
Fig. 1
However, the object may not be detected if the receiver detects a secondary beam (reflected by the side-reflecting surface), even if the entering object interrupts the main beam.
It is thus important to position the units at the correct distance from any reflecting surface: The minimum distance depends on:
- device operating distance
- reflecting surface nature
- position of the object inside the sensitive area
It is necessary to evaluate this distance on the field according to the operating conditions; however a minimum distance from the reflecting surface of about 0.5 m is suggested.
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DS2 series Instruction manual

2.2.3. Installation of several adjacent light grids

When several devices must be installed in adjacent areas, it is necessary to prevent the interference between the emitter of one device and the receiver of another.
Fig.2 provides an installation example of possible interference between different devices and two possible solutions.
NO
SI
SI
Fig. 2
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Instruction manual DS2 series

3. MECHANICAL MOUNTING

The emitter and receiver units have to be mounted with the relevant sensitive surfaces facing each other. The connectors must be positioned on the same side and with the operating distance of the model used (see section 10 “Technical data”). The two units must be aligned and parallel as much as possible. To mount the device, insert the threaded pins supplied (see Fig.3) in the slots present on the two units.
Depending on the particular application and/or type of support, the operator can use the fixing pins or the rigid fixing brackets supplied to mount the two units (see Fig.4).
Fig. 3
Fig. 4
Rigid fixing brackets can be used where no big mechanical corrections are required during the alignment operation. Rotating supports for the correction of the unit inclination of ±1° on the medial transversal axis and of ±5° on the longitudinal axis, are available on request. In applications with particularly strong vibrations, the use of anti-vibration shock absorbers able to reduce the impact of vibrations together with threaded pins, rigid brackets and/or rotating supports are recommended.
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DS2 series Instruction manual

4. ELECTRICAL CONNECTIONS

The electrical connection between the emitting and receiving units is made through a male M12 connector located in the lower part of the light grid.
TEACH-IN /
(OUTPUT HOLD) / (SERIAL OUTPUT ENABLE)
RECEIVER (RX):
RX/TX +
GND
RX/TX -
NOT USED
5
6
7
1
4
3
2
8
SYNC
1 = white = RX/TX ­2 = brown = +VDC 3 = green = ANALOGUE OUT 4 = yellow = SWITCHING OUTPUT 5 = grey = TEACH-IN / (OUT HOLD) / (SERIAL OUT ENABLE) 6 = pink = RX/TX + 7 = blue = GND 8 = red = SYNC
SWITCHING OUTPUT
ANALOGUE OUTPUT
+ VDC
+VDC
2
1
EMITTER (TX):
GND
3
4
SYNC
8
1 = brown = +VDC 2 = white = NOT USED 3 = blue = GND 4 = black = SYNC
Instruction manual DS2 series

4.1. Notes on connections

The following precautions regarding electrical connections have to be respected for the correct functioning of the AREAscan
TM
light grid.
• Shielded cables are not foreseen in the standard connection. However, if necessary, these cables can be used in presence of ground connection of both the unit and cable, as shown in Fig.5.
Fig. 5
• In any case, these cables must not be placed in contact with or near any high voltage cables (e.g. motor power supplies, inverters, etc) that, generating strong electromagnetic fields, can compromise the correct functioning of the device.
• Ground connection of the two units is not necessary. However, if required, the connection is possible tightening the specific screw supplied instead of one of the 8 screws that lock the heads of each unit (see Fig.6).
• Follow the connection illustrated in Fig.5 when ground connection of the entire system is used.
Fig. 6
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DS2 series Instruction manual

5. FUNCTIONING MODES

The DS2 light grids detect and measure objects placed inside the detection area. Hence, beam interruptions can cause output switching, analogue output signal variation and serial output updating. Small objects (up to 12 mm) detection and geometrical measurements determined with approximately 6 mm resolution can be obtained by setting the device according to the different functioning modes. Beam scanning is sequential and the update of all the outputs is made at each scanning, within a period equal to the device response time.

5.1. Detection mode

The detection mode is activated whenever at least one beam is interrupted inside the detection area. The activation causes the digital output switching (signalled by the powering of the yellow LED). The DS2 presents many different functions, listed below, that condition the switching output:
• Switching Output Mode: indicates if electrical current passes through switching output; the output
can be normally closed (N.C.) or normally open (N.O.).
• Switching Output Delay: delays the re-setting of the switching output after detection. The delay
time can be selected.
• Acquisition and detection (Teach-in): allows a conditioned detection of the object inside the
detection area: if the object corresponds (without resolution) to the object detected during the Teach­in phase, the output switches. On the contrary nothing happens. The following modes can be set:
- absolute Teach-in detection: the output switches only if the previously set object is re-detected in the same position.
- relative Teach-in detection: the output switches only if the previously set object (without resolution) is re-detected, independently from the position in the sensing area.

5.2. Measurement mode

The measurement mode depends on the number of interrupted beams and causes the switching of the analogue output and of the serial output (and also of the digital output). The DS2 presents many different measurement functions, listed here below:
• Absolute measurements: measurement is obtained considering the first photoelement (1) as the reference beam beginning from the connector side. The DS2 light grid has in particular the following functions:
1. top beam: provides the measurement between the reference beam and the obscured beam
furthest away from the reference
2. bottom beam: provides the measurement from the reference beam and the obscured beam
closest to the reference
3. middle beam: provides the measurement of the beam corresponding to the medium point
between the obscured beam furthest away from the reference and the obscured beam closest to the reference
• Relative measurements: measurement is obtained not considering absolute references. The measurement depends on the number of obscured beams. The DS2 light grid has in particular the following functions:
4. total beams: supplies the measurement corresponding to the total number of obscured beams
5. total contiguous beams: supplies the measurement corresponding to the maximum number of
contiguous beams obscured
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Instruction manual DS2 series

5.3. Transition detection (number of transitions)

The transition detection counts the number of transitions in the detection area. The number of transition increases each time that an object is detected inside the detection area and decreases each time the objects remain outside (transition light->dark).

5.4. Notes on functioning mode

• The DS2 light grids can configure the beam reference status, specifically selecting it from the user
interface. The default selection is “dark beam”, but the operator can select the complementary situation i.e. “light beam”.
• Not all the functions can be selected using dip-switches. Please refer to the following tables to
discover the local programmability of the device.
• The 0-10 V analogue output, supplies limited information if compared to the information that can be
obtained from the serial output; some functions are significant only if obtained in a serial ambient. The analogue voltage value is supplied, in these cases, without direct correspondence, as indicated in the tables found in page 12, 24 and 26. The formula to determine the voltage is obtained with the following syntax:
V
OUT
=V
RES
* N
[xxx ; yyy]
BEAM
Where V
V
= voltage value of the analogue output
OUT
= 10V/total n° of beams of the device = Voltage value corresponding to the
RES
minimum resolution (obtained obscuring only one beam)
N
[xxx ; yyy] = Number of beams belonging to the group [XY]
BEAM
(i.e. between “xxx” beam and “yyy” beam)
Please note that the longer DS2 is, the less conditioning is V
In the worst case V
RES.
= 43 mV !
RES
(using the DS2 165 model)
The first reference beam to select, by using only dip-switches, can be the one closest beam (default reference) or the one furthest away from the connector, located at the opposite side of the unit where the analogue voltage is at the minimum level (positive ramp 0-10 V) or maximum (negative ramp 10-0V) in correspondence of the obscuring of the default reference beam.
Fig. 10 can be used as an example, considering a device with 10 beams, where the obscuring of one beam corresponds to the V
variation of 1V (V
OUT
= 1V). At last beam obscuring, the V
RES
OUT
reaches 10 V full scale. If the first beam is selected as the reference, the V selected as the reference, the V
in the example is = 7 V (B).
OUT
in the example is = 6 V. If the last beam is
OUT
Analogue output Output level Switching output
A Reference = 1° beam 6 V B Reference = last beam 7 V
ON
Fig. 10
The information can be obtained from the serial output, setting the top beam and bottom beam measurement modes.
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DS2 series Instruction manual

5.5. RS485 serial output setting

Serial output data updating is usually made at the end of each scanning cycle. This conditions enormously the response time, as it is depends on the serial baud-rate, data structure and information detail that has to be transmitted on the serial output for the application. Some serial configuration commands have been added to make the device flexible to different applications. The remote user interface completely controls these commands.
• Baud-rate: allows the change of the serial switching speed. The 485 standard guarantees
excellent disturbance immunity and thus the increase of the transmission speed may compromise the system. The speed has to be evaluated according to the application, plant and cabling.
• Transmission standard selection: the ASCII or Binary data structure transmitted by the serial
output can be selected; in applications where time is important, the binary structure is preferred. For details concerning data transmission please see section 7 “Communication protocol”.
• Data partition selection: allows a partial serial data transmission. In particular, the transmission of
the complete beam status array or partial beam status array is distinguished: The two conditions exclude each other (one or the other). If the partial transmission is selected, one of the aforementioned measurement modes has to be chosen. Partial transmission is preferred for applications where time factors are important. Further partial transmission is short protocol which transmission is purely binary and extremely fast. Fuction is enable for single measure only. For data transmission details please see section 7 “Communication protocol”.
• Data sending mode selection: function allows the operator to choose when to send the data from
the serial output. The sending can also be inhibited by a specific selection (via “software”, using the specific command, via “hardware” programming the serial output enable input – pin 5 RX connector – using the user interface). The sending mode selection can be reached only via remote control. Four options can be selected: data sending at each machine cycle which is the default setting, data sending at each output status change, data sending at analogue output value change, user sending request, using the interface command button. This last condition can be requested also by an external command previously programming the device (per details please see section 7 “Communication protocol”).

6. FUNCTION AND PROGRAMMING SELECTION

The functions implemented in the AREAscanTM DS2 light grids can be selected using the dip-switches present on the device receiving unit or via remote. The default configurations are given below:
• Default configuration for receiver unit The device is supplied with the standard configuration shown in the figure:
• Default configuration for emitter unit The device is supplied with the maximum emission adjustment setting (minimum sensitivity)
• Sensitivity adjustment Sensitivity adjustment is made using the trimmer located inside the emitter unit lid. This function allows the operator to change the emitter intensity.
ON
ON
1 2 3 4
ON
1 2 3 4
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Instruction manual DS2 series

6.1. Local programming

ON
1A 2A 3A 4A
ON
1B 2B 3B 4B
Dip
N.
1A
2A
3A
reference beam
4A
Function
Programming
mode
Serial output
analysis mode
Measurement
Measurement
analysis beam
The function programming and selection is made using dip-switches located inside the receiver unit lid.
The following table indicates the type of function and relative position of the dip-switches.
Active Pos
Run
Time
Start-up
Start-up
Start-up
Setting Output
Mode Analogue Switching Serial
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Local
Remote
- - -
See remote setting
Complete - -
Partial - -
Reference = First
(closest to connector)
Beam
Reference = Last
Beam
Top or Bottom
(Absolute Measure)
Total
(Relative Measure)
V=V
Res*NBEAM
Incr. Ramp(0-10V)
V=10-V
Decr. Ramp(10-0V)
V=V
[Top; ref]
Res*NBEAM
[Top; ref]
- -
Res*NBEAM
[dark]
Complete
Beam Status
Array
Partial
ASCII
-
Partial
Top Beam
Partial
Bottom Beam
-
Partial
Total Beam
Inactive Teach-in
1B
analysis mode
2B
3B
4B
Teach-in detection
Teach-in
Mode
Switching
Output
Mode
Switching
Output
Delay
ON
OFF
Start-up
ON
Start-up
OFF
ON
Start-up
OFF
ON
OFF
Start-up
(Normal mode)
Active Teach-in -
Absolute pos.
detection
Relative pos.
detection
Normally
Open
Normally
Closed
No
Delay
100ms -
- Presence detection -
Conditional
presence detection
-
from Teach-in
Positional detection
-
of Teach-in ref.
-
object
-
Detection of Teach-
in reference object
-
Voltage on
-
switching device
-
during detection
No voltage on
-
switching device
-
during detection
- - -
Restore from
detection
-
delay = 100ms
( - ) Shows that the state of considered dip-switch does not influence kind of output correlated; ouptut is old setting by state of function of the others dip-switches.
The functions, with the exception of the programming mode, cannot be activated during device functioning. The functions are activated at device powering.
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