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8

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Functions

Baumer

34

Operating Manual

OM20/ OM30 RS485 with Modbus RTU | V1

Invalid Value Handling – example 2

n

Parameters:
▪ Time period (Hold Time):

1000 ms

n

Interpretation: After expiration of the time period, the placeholder for an invalid value is out-
put at the digital output.

Digital output

50

250

1

2

3

4

5

s

mm

Hold Time

Signal quality

NaN

Ill. 10:

Invalid Value Handling – example 2

Modbus RTU command – holding register: Invalid Value Handling

Address 800 – Dropout Timeout:

Address

Access

Number of
registers

Data type

Description

800

Read/write

1

uint16_t

Interval for suppressing invalid mea-
sured values [ms]

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Содержание 11233538

Страница 1: ...V1 3 16 2021 EN US Operating Manual Laser distance sensors OM20 OM30 RS485 with Modbus RTU...

Страница 2: ...3 Measurement field 10 3 4 Operating and display elements 11 3 4 1 Sensor LEDs 11 3 4 2 Teach button 11 3 5 Modbus RTU 13 3 6 Dimensional drawing 16 4 Transport and storage 17 4 1 Transport 17 4 2 Del...

Страница 3: ...7 Switching points 35 8 8 Polarity 36 8 9 Hysteresis 37 8 10 Function of the LED 40 8 11 Function of the Teach button 40 8 12 Switching the laser on and off 41 8 13 Resetting the sensor 42 8 14 Indivi...

Страница 4: ...with all safety instructions and handling instructions given in this manual In addition the local occupational health and safety regulations and general safety regulations apply The illustrations in...

Страница 5: ...rdance with the applicable standards and regulations the state of the art and our many years of knowledge and experi ence The manufacturer accepts no liability for damage due to the following reasons...

Страница 6: ...n 1 x sensor n 1 x Quickstart n 1 x general information leaflet In addition you can find the following information among other things in digital format at www baumer com n Operating manual n Data she...

Страница 7: ...his product is a precision device designed for the detection of objects the acquisition of physical measuring units and for the evaluation of measured values for output in the form of electrical signa...

Страница 8: ...with the following type codes are specified according to laser class 1 OM20 xxxxx HH xxx OM30 xxxxx HH xxx LASER RADIATION DO NOT STARE INTO BEAM Wavelength 640 670nm IEC 60825 1 Ed 3 2014 CLASS 2 LA...

Страница 9: ...a tion principle For this purpose the sensor projects a laser point on the object to be measured This laser point is mapped on the receiver element by the receiving optics The distance to the object t...

Страница 10: ...n Region in which the measurement object must be present for the sensor to deliver reliable measurement results n Unwanted objects objects not to be measured in this region may lead to deviations in t...

Страница 11: ...is automatically deactivated after 5 min timeout can be parameterized via Modbus RTU When the teach button is pressed for longer than 12 seconds the sensor returns to operating mode without performin...

Страница 12: ...ch button is active If the LEDs do not light up the teach button is deactivated by the timeout Restart the sensor b Keep the Teach button pressed for 8 seconds Yellow and green LEDs blink simultaneous...

Страница 13: ...ster corresponds to 2 bytes If the data type of a sensor parameter is wider than a 2 byte Modbus register the parameter is divided among several Modbus registers The less sig nificant bits are located...

Страница 14: ...togram for exposure reserve 1050 16 App Specific Tag Customer spec identification of the sen sor 1066 16 Function Tag Customer spec identification of the sen sor 1082 16 Location Tag Customer spec ide...

Страница 15: ...stance his togram 312 1 Histogramm Distance Number of Bins Number of bins in the distance histogram 313 40 Histogramm Distance Bin 1 20 Distance histogram bins 1 20 353 2 Histogramm Exposure Re serve...

Страница 16: ...20 OM30 RS485 with Modbus RTU V1 3 6 Dimensional drawing 13 34 5 37 M8 x 1 2 9 11 2 19 31 6 LED Teach in 26 3 2 3 2 2 2 7 7 Ill 3 Dimensional drawing OM20 13 6 49 4 2 3 9 41 M8 x 1 6 4 29 40 3 Teach i...

Страница 17: ...ect as soon as it is detected Damages can only be claimed within the applicable claims deadlines In case of externally visible transport damage proceed as follows Instruction a Do not accept the deliv...

Страница 18: ...he sensor 6 to 10 to the side so that the light directly reflected by the surface does not hit the receiver of the sensor n For mounting use at least 1 tooth lock washer to break open the paint layer...

Страница 19: ...vent measurement errors Mounting near strong ambient light Prevent the ambient light from entering the detection range of the receiver Mounting several sensors close to each other Prevent the detectio...

Страница 20: ...0 V 3 analog 2 1 Vs teach in 1 2 4 3 1 Vs 2 Rx Tx 3 0 V 4 Rx Tx 6 2 Connection diagram WH 2 BK 4 Rx Tx Rx Tx RS 485 0 V BU 3 BN 1 VS 1 BN Brown 2 WH White 3 BU Blue 4 BK Black 6 3 Connecting the sens...

Страница 21: ...ighest Sampling Mode Free Running Measurement Range Zero Position 0 mm Distance Near Sdc Distance Far Sde Invalid Value Handling Hold Time 0 ms SSC1 Configuration SP 1 Sde 10 mm I SP 2 Sdc 10 mm II Po...

Страница 22: ...Number of registers 13 Result You receive the response telegram with the following structure the measured value is in ad dress 202 and 203 INFO 1 Modbus register corresponds to 2 bytes If the data typ...

Страница 23: ...register with the address 200 Modbus RTU command input register measured value and additional information Address 200 All Measurement Values Address Access Number of registers Data type Description 2...

Страница 24: ...us achieve a sufficient exposure reserve The exposure time depends on the properties of the measured surface color structure etc and the alignment of the sensor to the object to be measured Dark objec...

Страница 25: ...s exposure time to the object to be measured in order to always receive an optimum light quantity and thus achieve a sufficient exposure reserve The exposure time depends on the properties of the meas...

Страница 26: ...ication The sensor is set as follows in the factory settings n Slave address 1 n Baud rate 57600 Bd Modbus RTU command holding register communication Address 1100 Modbus slave address Address Access N...

Страница 27: ...ision filter calculates the results in the form of floating values The old est measured value is removed as soon as a new measurement is added Therefore the mea suring frequency is not affected by the...

Страница 28: ...Average and Moving Median The higher the number of measured values per filter the longer the response time of the sen sor This means that a change in distance only becomes fully visible for the outpu...

Страница 29: ...Moving Median filter 1 21 values n Moving Average filter 1 256 values Modbus RTU command holding register Filter mode Address 101 Precision Address Access Number of registers Data type Description 101...

Страница 30: ...ed in most applications fac tory setting The fastest possible recording of measurement results ensures a larger amount of data Interval trigger mode n The sensor measures with a constant time interval...

Страница 31: ...Output measured value 150 mm Example 2 n Physical distance to the object to be measured 150 mm n Set zero position 150 mm n Output measured value 50 mm The following options are available to you for...

Страница 32: ...it of the measurement range must be smaller than the maximum limitation of the sensor Sde The alarm output is activated as soon as no object to be measured is located within the config ured measuremen...

Страница 33: ...l is too weak due to reflections or unidentifiable objects The function can be configured via the following parameter n Time period Hold Time The time period indicates how long an invalid measured val...

Страница 34: ...d the placeholder for an invalid value is out put at the digital output Digital output 50 250 1 2 3 4 5 s mm Hold Time Signal quality NaN Ill 10 Invalid Value Handling example 2 Modbus RTU command hol...

Страница 35: ...asurement object Reach a desired position with a tool that edits an object Window mode SP1 SP2 SP1 SP2 0 1 Ill 12 Sensor in the window mode measurement mode n The smallest switching window is 2 mm n P...

Страница 36: ...is not reached n Window mode The switching output is activated as soon as the measured value is within the window of SP1 and SP2 Active Low SP1 SP2 SP1 Point mode Window mode 0 1 0 1 Ill 14 Polarity A...

Страница 37: ...his results in a right aligned hysteresis If the measured distance is less than 200 mm the switching output is active If the object to be measured moves from 200 mm to 201 mm the switching output rema...

Страница 38: ...measured nears the switching points from the inside of the window the switching output remains active until 200 mm and 300 mm parameterized switching points Point mode switching output behavior Posit...

Страница 39: ...9 Behavior of the switching output in window mode positive hysteresis Negative hysteresis High Low Level Hysteresis Switching point P2 Active high level Switching point P1 Hysteresis Window Ill 20 Beh...

Страница 40: ...of the Teach button With the Teach button function Local User Interface you have the option of specifying the mode of the Teach button You have a choice between the Xpert factory setting and Xpress m...

Страница 41: ...rs Data type Description 412 Read write 1 uint8_t Parameterize mode of the teach but ton n 0 Xpert n 1 Xpress Also see about this 2 Teach button 11 8 12 Switching the laser on and off INFO The laser c...

Страница 42: ...e sensor various individual identifiers in order to uniquely iden tify the sensor An identification of the sensor can be stored in relation to the application the function or the place of use as well...

Страница 43: ...re available n Operating time since the last power up n Operating time since an individually configurable point in time by reset n Operating time since the initial power up Modbus RTU command input re...

Страница 44: ...End of valid range n Number of intervals bins Example Measurement range of the sensor 50 550 mm n Unit mm n Start of valid range 50 mm n End of valid range 550 mm n Number of intervals bins 20 This y...

Страница 45: ...isters Data type Description 310 Read 2 int32_t End of valid range Address 312 Histogramm Distance Number of Bins Address Access Number of registers Data type Description 312 Read 1 uint16_t Number of...

Страница 46: ...of valid range 0 n End of valid range 100 n Number of intervals bins 20 This yields 1 interval covers a value range of 5 Example The object to be measured is outside the measurement range for 5 measu...

Страница 47: ...ption 355 Read 2 uint32_t End of valid range Address 357 Histogramm Exposure Reserve Number of Bins Address Access Number of registers Data type Description 357 Read 1 uint16_t Number of bins Address...

Страница 48: ...ption 0 Read 16 STRING Manufacturer Address 16 Vendor Text Address Access Number of registers Data type Description 16 Read 16 STRING Manufacturer s note Address 32 Product Name Address Access Number...

Страница 49: ...isters Data type Description 105 Read 5 STRING Hardware version of the sensor Address 110 Firmware Revision Address Access Number of registers Data type Description 110 Read 5 STRING Firmware version...

Страница 50: ...at do not affect the housing surface and seals NOTICE Material damage due to improper cleaning Unsuitable cleaning agents and methods can cause leaks and damage the sensor the seals or the connections...

Страница 51: ...on can be found in the data sheet n Remedy Move the measurement object into the measurement range n Error The measurement results are incorrect n Possible cause The direct reflection of the laser hits...

Страница 52: ...10 Invalid Value Handling example 2 34 Ill 11 Sensor in the point mode measurement mode 35 Ill 12 Sensor in the window mode measurement mode 35 Ill 13 Polarity Active High 36 Ill 14 Polarity Active Lo...

Страница 53: ......

Страница 54: ...KR 03923 Seoul Phone 82 2 6351 9909 Denmark Baumer A S DK 8210 Aarhus V Phone 45 8931 7611 India Baumer India Private Ltd IN 411038 Pune Phone 91 20 66292400 Venezuela Baumer BAVE SA VE 1070 Caracas...

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