Riftek RF602 Series User manual

Certified according to ISO 9001:2015
LASER TRIANGULATION SENSORS
22, Logoisky tract, Minsk
220090, Republic of Belarus
tel/fax: [phone]
[e-mail]
User's manual
www.riftek.com
RF602 Series

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Laser Triangulation Sensors. RF602 Series
RF602 [Revision 1.2.0] 28.01.2019
Contents
.............................................................................................................................................41. Safety precautions
.............................................................................................................................................42. CE сompliance
.............................................................................................................................................43. Laser safety
.............................................................................................................................................44. General information
.............................................................................................................................................55. Basic technical data
.............................................................................................................................................66. Example of item designation when ordering
.............................................................................................................................................67. Structure and operational principle
.............................................................................................................................................68. Dimensions and mounting
........................................................................................................................................... 68.1. Overall and mounting dimensions
........................................................................................................................................... 78.2. Overall demands for mounting
.............................................................................................................................................79. Connection
.............................................................................................................................................810. Configuration parameters
........................................................................................................................................... 810.1. Time limit for integration
........................................................................................................................................... 810.2. Sampling mode
........................................................................................................................................... 810.3. Sampling period
........................................................................................................................................... 910.4. Zero point
........................................................................................................................................... 910.5. Line AL operation mode
........................................................................................................................................... 1010.6. Time lock of the result
........................................................................................................................................... 1010.7. Method of results averaging
........................................................................................................................................... 1010.8. Number of averaged values/time of averaging
........................................................................................................................................... 1110.9. Factory parameters table
.............................................................................................................................................1111. Description of RS232 and RS485 interfaces
........................................................................................................................................... 1111.1. RS232 port
........................................................................................................................................... 1111.2. RS485 port
........................................................................................................................................... 1111.3. Serial data transmission format
........................................................................................................................................... 1111.4. Modes of data transfer
........................................................................................................................................... 1111.5. Communication sessions types
........................................................................................................................................... 1211.6. Configuration parameters
................................................................................................................. 1211.6.1. Rate of data transfer through serial port
................................................................................................................. 1211.6.2. Net address
................................................................................................................. 1211.6.3. Factory parameters table
........................................................................................................................................... 1211.7. RIFTEK protocol (binary format)
................................................................................................................. 1211.7.1. Request ................................................................................................................. 1311.7.2. Answer ................................................................................................................. 1311.7.3. Data stream
................................................................................................................. 1311.7.4. Output rate
................................................................................................................. 1311.7.5. Request codes table
................................................................................................................. 1411.7.6. List of parameters
................................................................................................................. 1511.7.7. Notes ................................................................................................................. 1511.7.8. Examples of communication sessions
........................................................................................................................................... 1811.8. Modbus RTU protocol (binary format)
................................................................................................................. 1811.8.1. Input Registers (Read only)
................................................................................................................. 1811.8.2. Holding Registers (Read / Write)
........................................................................................................................................... 1911.9. ASCII format
.............................................................................................................................................2012. Analog outputs
........................................................................................................................................... 2012.1. Current output 4…20 mA
........................................................................................................................................... 2112.2. Voltage output 0…10 V
........................................................................................................................................... 2112.3. Configuration parameters
................................................................................................................. 2112.3.1. Range of the analog output
................................................................................................................. 2112.3.2. Analog output operation mode
........................................................................................................................................... 2112.4. Factory parameters table
.............................................................................................................................................2113. Parameterization program

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........................................................................................................................................... 2113.1. Function
........................................................................................................................................... 2213.2. Program setup
........................................................................................................................................... 2213.3. Obtaining connection to sensor (RS232/RS485)
........................................................................................................................................... 2313.4. Checking of the sensor operability
........................................................................................................................................... 2413.5. Connection via the ASCII interface
........................................................................................................................................... 2513.6. Connection via the Modbus RTU protocol
........................................................................................................................................... 2613.7. Display, gathering and scanning of data
........................................................................................................................................... 2713.8. Setting and saving parameters of the sensor
................................................................................................................. 2713.8.1. Setting parameters
................................................................................................................. 2713.8.2. Automatic data stream mode after power switch on
................................................................................................................. 2713.8.3. Saving parameters
................................................................................................................. 2813.8.4. Saving and writing a set of parameters
................................................................................................................. 2813.8.5. Recovery of default parameters
.............................................................................................................................................2814. RFSDK library
.............................................................................................................................................2815. Warranty policy
.............................................................................................................................................2816. List of changes
.............................................................................................................................................2917. Distributors

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Laser Triangulation Sensors. RF602 Series
RF602 [Revision 1.2.0] 28.01.2019
1. 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.
2. CE сompliance
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.
3. Laser safety
The sensors make use of an c.w. 660 nm (or 405 nm or 450 nm) wavelength
semiconductor laser. Maximum output power is 1 mW. The sensors belong to the 2 laser
safetyclass. 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.
4. 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.
The series includes 6 models of sensors with the measurement range from 10 to
500 mm and the base distance from 20 to 105 mm.
There are two options of laser mounted in the sensor: 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.

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5. Basic technical data
RF602-
20/10
20/25
30/50
55/100
65/250
105/500
Base distance, mm
20
20
30
55
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/°С
Max. measurement
frequency, Hz
9400
Light source
red semiconductor laser, 660 nm wavelength;
blue or UV semiconductor laser, 405 nm or 450 nm wavelength (BLUE version)
Output power, mW
1
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 V
Synchronization input, V
2,4 – 24
Logic output
programmed functions, NPN: 100 mA max; 40 V max
Power supply, V
9...36
Power consumption, W
1.5...2
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, °С
-10…+60
Permissible ambient
light, lx
10000
Relative humidity, %
5-95 (no condensation)
Storage temperature,
°С
-20…+70
Housing material
aluminum
Weight (without cable),
gram
40

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6. Example of item designation when ordering
RF602(BLUE)-X/D-SERIAL-ANALOG-IN-AL--M
Symbol
Description
(BLUE)
Blue laser option (405 nm or 450 nm)
X
Base distance (beginning of the range), mm
D
Measurement range, mm
SERIAL
The type of serial interface: 232 (RS232) or 485 (RS485)
ANALOG
Attribute showing the presence of analog output: 4…20 mA (I) or 0…10 V (U)
IN
Synchronization input
AL
User programmable input/output signal
М
Cable length, m
Example: RF602-65/250-232-I-IN-AL-3 – red laser, base distance - 65 mm, measurement range - 250 mm,
RS232 serial port, 4…20 mA analog output, synchronization input and AL output are available, cable length -
3 m.
7. 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
8. Dimensions and mounting
8.1. 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.

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Figure 2
8.2. 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.
9. 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 U+
Gnd (power)
TXD
RXD
U/I
IN
AL
Gnd (common for signals)
Red
Brown
Green
Yellow
Blue
White
Pink
Gray
485-U/I-IN-AL
free leads
Power U+
Gnd (power)
DATA+
DATA-
U/I
IN
AL
Gnd (common for signals)
Red
Brown
Green
Yellow
Blue
White
Pink
Gray

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10. 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:
10.1. 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.
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
s (minimum possible integration time is 3 s). As the integration time increases above
106 s, 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 s.
Note 3. Decreasing of this parameter lets to increase the measurement frequency,
but can decrease the measurement accuracy.
10.2. 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.
10.3. 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 s.
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 is so built
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

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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 in п. 11.7.4.
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.
10.4. 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.
10.5. 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. 3.1).
The "Mutual synchronization" mode makes it possible to synchronize
measurement times of two and more sensors. It is convenient to use this mode to control
one object with several sensors, e.g., in the measurement of thickness. On the hardware
level, synchronization of the sensor is effected by combining AL lines (Fig. 3.2). Using the
parametrization program, one of the sensors should be set to the "Master" mode, and the
rest - to the "Slave" mode.
In the "Hardware zero-set" mode, connection AL input to the ground potential sets
the beginning of coordinates into the current point (Fig. 3.3)*.
In the "Hardware laser switch OFF/ON" mode, connection AL input to the ground
potential switches the laser ON/OFF (Fig. 3.3)*.
In the "Encoder" mode, the AL and IN lines work as inputs of quadrature signals. In
this mode, the encoder can be connected to these lines, and the measurements will be
synchronized with the encoder.
In the "Input" mode, the AL line state is transmitted in the status word in the Ethernet
packet.

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In the "Reset of the Ethernet packets counter" mode, connection AL input to the
ground potential resets the counter (Fig. 3.3)*.
*Note. A low level of the AL line is holding for 100 s or more, and a high level of
the AL line is holding for 100 s.
Out of the range indication
Mutual synchronization
Hardware zero-set/
Hardware laser ON/OFF
Figure 3.1
Figure 3.2
Figure 3.3
10.6. Time lock of the result
If the sensor does not find the object or if the authentic result cannot be received, a
zero value is transferred. The given parameter sets time during which the last authentic
result is transferred.
10.7. Method of results averaging
This parameter defines one of the two methods of averaging of measurement
results implemented directly in the sensor:
· Averaging over a number of results
· Time averaging
When averaging over a number of results is selected, sliding average is
calculated.
When time averaging is selected, the results obtained are averaged over the time
interval chosen.
10.8. Number of averaged values/time of averaging
This parameter specifies the number of source results to be averaged for deriving
the output value or time of the averaging .
The use of averaging makes it possible to reduce the output noise and increase the
sensor resolution.
Averaging over a number of results does not affect the data update in the sensor
output buffer.
In case of time averaging, data in the output buffer are updated at a rate equal to the
averaging period.
Note. The maximum value is 127.