SCHMITT Acuity AR100 User manual

© 2018 Schmitt Industries
Acuity AR100
Triangulation Sensor Manual
Revision 1.1 on 2.6.2018
© 2018 Schmitt Industries
2765 NW Nicolai St.
Portland, OR 97210 USA
[e-mail]
Tel: [phone]
Fax: [phone]
Acuitylaser.com
Acuity is a product line of
schmittindustries.com

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
2
Table of Contents
Safety Precautions..............................................................................................4
CE compliance....................................................................................................4
Laser safety.........................................................................................................4
General information............................................................................................4
Basic technical data ...........................................................................................5
Options to designate when ordering the AR100..............................................6
Structure and operational principle ..................................................................6
Dimensions and mounting.................................................................................7
Overall and mounting dimensions...........................................................................7
Overall demands for mounting.................................................................................7
Connection..........................................................................................................8
Configuration parameters..................................................................................8
Time limit for integration ..........................................................................................8
Sampling mode..........................................................................................................9
Sampling period ........................................................................................................9
Zero point.................................................................................................................10
Line AL operation mode .........................................................................................10
Time lock of the result ............................................................................................12
Method of results averaging...................................................................................12
Number of averaged values/time of averaging......................................................12
Factory parameters table........................................................................................12
Description of RS232 and RS485 interfaces...................................................13
RS232 port...............................................................................................................13
RS485 port...............................................................................................................13
Serial data transmission format.............................................................................13
Modes of data transfer............................................................................................13
Communication sessions types.............................................................................13
Configuration parameters.......................................................................................14
Rate of data transfer through serial port ................................................................14
Net address...........................................................................................................14
Factory parameters table.......................................................................................14
Acuity protocol (binary format)..............................................................................14
Request.................................................................................................................14
Answer ..................................................................................................................15
Data stream...........................................................................................................16
Output rate............................................................................................................16
Request code table................................................................................................16
Notes.....................................................................................................................18
Modbus RTU protocol (binary format)...................................................................22
Input Registers (Read only)...................................................................................22
Holding Registers (Read / Write)...........................................................................22
ASCII format ............................................................................................................23

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
3
Analog outputs..................................................................................................25
Current output 4…20 mA........................................................................................25
Voltage output 0…10 V ...........................................................................................26
Configuration parameters................................................................................26
Range of the analog output ...................................................................................26
Analog output operation mode...............................................................................27
Factory parameters table........................................................................................27
Parameterization program ...............................................................................27
Function...................................................................................................................27
Program setup.........................................................................................................27
Obtaining connection to sensor (RS232/RS485)...................................................28
Checking of the sensor operability........................................................................29
Connection via the ASCII interface........................................................................30
Connection via the Modbus RTU protocol ............................................................31
Display, gathering and scanning of data...............................................................32
Setting and saving parameters of the sensor .......................................................33
Setting parameters................................................................................................33
Automatic data stream mode after power switch on...............................................34
Saving parameters ................................................................................................34
Saving and writing a set of parameters..................................................................34
Recovery of default parameters.............................................................................35

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
4
Safety Precautions
•Use supply voltage and interfaces indicated in the sensor specifications
•In connection/disconnection of cables, the sensor power must be switched
off
•Do not use sensors in locations close to powerful light sources
•To obtain stable results, wait about 20 minutes after sensor activation to
achieve uniform sensor warm-up
CE compliance
The sensors have been developed for use in industry and meet the requirements
of the following Directives:
•EU directive 2014/30/EU. Electromagnetic compatibility (EMC).
•EU directive 2011/65/EU, “RoHS“category 9.
Laser safety
The sensors make use of a c.w. 660 nm (or 405 nm, 450 nm) wavelength
semiconductor laser. The maximum output power is 0.95 mW. The sensors
belong to the 2 laser safety class. The following warning label is placed on the
sensor body:
The following safety measures should be taken while operating the sensor:
•Do not target the laser beam to humans;
•Do not disassemble the sensor;
•Avoid staring into the laser beam.
General information
The sensors are intended for non-contact measuring and checking of position,
displacement, dimensions, surface profile, deformation, vibrations, sorting and
sensing of technological objects as well as for measuring levels of liquid and bulk
materials.

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
5
The series includes 6 models of sensors with the measurement range from 10 to
500 mm and the offset distance from 20 to 105 mm.
There are two options of laser sensors: RED laser (660 nm) or BLUE laser (405
or 450 nm). The use of blue lasers instead of conventional red lasers greatly
enhances capabilities of the sensors, in particular, for such uses as control of
high-temperature objects and organic materials.
Basic technical data
AR100
-10
-25
-50
-100
-250
-500
Base distance, mm
20
20
30
50
65
105
Range, mm
10
25
50
100
250
500
Linearity, %
±0.05% of the range
±0.1%
Resolution, %
0.01% of the range (for the digital output only)
0.02%
Temperature drift
0.02% of the range per /°С
Max. measurement
frequency, Hz
9,400 Hz
Light source
red semiconductor laser, 660 nm wavelength;
blue or UV semiconductor laser, 405 nm or 450 nm wavelength
(BLUE version)
Output power
≤0.95 mW
Laser safety class
2 (IEC60825-1)
Output interface:
digital
RS232 or RS485 (max. 921.6 Kbit/s)
analog
4…20 mA (load

500 Ohm) or 0…10
Synchronization
input
2.4 – 24 Volts
Logic output
programmed functions, NPN: 100 mA max; 40 V max
Power supply
9 …36 Volts
Power consumption
1.5..2 Watts
Environmental
resistance:
Enclosure rating
IP67
Vibration
20 g /10…1000 Hz, 6 hours for each of XYZ axes
Shock
30 g / 6 ms
Operating
ambient
temperature
-10…+60 °С
Permissible
10,000

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
6
ambient light, lux
Relative humidity
5-95% (no condensation)
Storage
temperature
-20…+70 °С
Housing material
aluminum
Weight (without
cable)
40 gram
Options to designate when ordering the AR100
Description
1
Red or Blue laser option (450 nm)
2
Measurement range, mm
3
The type of serial interface: 232 (RS232) or 485 (RS485)
4
Analog output of either: 4…20 mA (I) or 0…10 Volts (U)
5
Synchronization input
6
User programmable input/output signal
7
Standard cable length is 2 meter with options for longer cable lengths
Structure and operational principle
Operation of the sensors is based on the principle of optical triangulation
(Figure 1). Radiation of a semiconductor laser (1) is focused by a lens (2) onto an
object (6). Radiation reflected by the object is collected by a lens (3) onto a linear
CMOS array (4). Moving the object (6 - 6') causes the corresponding shift of the
image. A signal processor (5) calculates the distance to the object from the
position of the light spot on the array (4).
Figure 1

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
7
Dimensions and mounting
Overall and mounting dimensions
Overall and mounting dimensions of the sensors are shown in Figure 2. The
sensor housing is made of anodized aluminum. The front panel of the housing
has a glass window. The housing also contains mounting holes. The cable is
mounted on the sensor without connector.
Overall demands for mounting
The sensor is positioned so that the object under control has to be placed in the
working range of the sensor. In addition, no foreign objects should be allowed to
stay on the path of the incident and reflected laser radiation.
Where the objects to be controlled have intricate shapes and textures, the
incidence of mirror component of the reflected radiation to the receiving window
should be minimized.

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
8
Connection
Assignment of the cable wires is shown in the table below:
Model of the
sensor
Pin number
Assignment
Wire color
232-U/I-IN-AL
free lead
free lead
DB9
DB9
free lead
free lead
free lead
DB9
-
-
2
3
-
-
-
5
Power 9 to 36 Volts+
Ground (power)
TXD
RXD
Voltage / Current
IN
AL
Ground (common for
signals)
Red
Brown
Green
Yellow
Blue
Violet
Orange
Black
485-U/I-IN-AL
free leads
Power 9 to 36 Volts+
Ground (power)
DATA+
DATA-
Voltage / Current
IN
AL
Ground (common for
signals)
Red
Brown
Green
Yellow
Blue
Violet
Orange
Black
Configuration parameters
The nature of operation of the sensor depends on its configuration parameters,
which can be changed only by transmission of commands through serial port
RS232 or RS485. The basic parameters are as follows:
Time limit for integration
Intensity of the reflected radiation depends on the surface characteristics of the
object under control. Therefore, the output power of the laser and the time of
integration of radiation incident onto the CMOS-array are automatically adjusted
to achieve the maximum measurement accuracy.

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
9
Parameter "time limit for integration" specifies the maximum allowable time of
integration. If the radiation intensity received by the sensor is so small that no
reasonable result is obtained within the time of integration equal to the limiting
value, the sensor transmits a zero value.
Note 1. The measurement frequency depends on the integration time of the
receiving array. The maximum frequency (9.4 kHz) is achieved for the integration
time ≤106 μs (minimum possible integration time is 3 μs). As the integration time
increases above 106 μs, the result updating time reduces proportionally.
Note 2. Increasing of this parameter expands the possibility of control of low-
reflecting (diffuse component) surfaces; at the same time this leads to reduction
of measurement frequency and increases the effects of exterior light
(background) on the measurement accuracy. Factory setting of the limiting time
of integration is 3200 μs.
Note 3. Decreasing of this parameter lets to increase the measurement
frequency, but can decrease the measurement accuracy.
Sampling mode
This parameter specifies one of the two result sampling options in the case
where the sensor works in the data stream mode:
•Time Sampling;
•Trigger Sampling.
When Time Sampling is selected, the sensor automatically transmits the
measurement result via serial interface in accordance with the selected time
interval (sampling period).
When Trigger Sampling is selected, the sensor transmits the measurement result
when the external synchronization input (IN input of the sensor) is switched and
taking the division factor set into account.
Sampling period
If the Time Sampling mode is selected, the ‘sampling period’ parameter
determines the time interval in which the sensor will automatically transmit the
measurement result. The time interval value is set in increments of 1 μs.
If the Trigger Sampling mode is selected, the ‘sampling period’ parameter
determines the division factor for the external synchronization input. For
example, for the parameter value equal to 100, data are transmitted through bit-
serial interface when each 100th synchronizing pulse arrives at IN input of the
sensor.
Note 1. It should be noted that the ‘sampling mode’ and ‘sampling period’
parameters control only the transmission of data. The sensor operation algorithm

AR100 Operation Manual
© 2018 Schmitt Industries Revision 1.1
10
is built so that measurements are taken at a maximum possible rate determined
by the integration time period, the measurement results are sent to buffer and
stored therein until a new result arrives. The above-mentioned parameters
determine the method of the readout of the result form the buffer.
Note 2. If the bit-serial interface is used to receive the result, the time required for
data transmission at selected data transmission rate should be taken into
account in the case where small sampling period intervals are used. If the
transmission time exceeds the sampling period, it is this time that will determine
the data transmission rate. The calculation of time required to transmit the result
is given on p.16.
Note 3. It should be taken into account that the sensors differ in some variation in
the parameters of the internal generator, which affects the accuracy of the Time
Sampling period.
Zero point
This parameter sets a zero point of absolute system of coordinates in any point
within the limits of a working range. You can set this point by corresponding
command or by connecting AL input to the ground line (this input must
beforehand be set to mode 4). When the sensor is fabricated, the base distance
is set with a certain uncertainty, and, if necessary, it is possible to define the
point zero more accurately.
Line AL operation mode
This line can work in one of the eight modes defined by the configuration
parameter value:
•mode 1: indication of run-out beyond the range;
•mode 2: mutual synchronization of two or more sensors (slave);
•mode 3: mutual synchronization of two or more sensors (master);
•mode 4: hardware zero-set line;
•mode 5: hardware laser switch OFF/ONN;
•mode 6: encoder;
•mode 7: input;
•mode 8: reset of the Ethernet packets counter.
In the "Indication of run-out beyond the range" mode, logical “1” occurs on the AL
line if an object under control is located within the working range of the sensor
(within the selected window in the range), and logical "0" occurs if the object is
absent in the working range (within the selected window). For example, in such
mode this line can be used for controlling an actuator (a relay), which is activated
when the object is present (absent) within the selected range (Fig. 6.1).