Baumer OM20 Operating Manual
Laser distance sensors
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Summary of Contents for Baumer OM20
- Page 1 Operating Manual Laser distance sensors EN-US OM20/ OM30 RS485 with Modbus RTU...
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Page 2: Table Of Contents
7.2 Set up RS485 interface with Modbus RTU ................... 22 7.3 Measured value and additional information ..................23 7.3.1 Measurement rate........................24 7.3.2 Exposure reserve........................24 7.3.3 Response delay ........................25 Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... - Page 3 9.2 Histogram function..........................44 9.3 Device information ..........................48 10 Maintenance..............................50 10.1 Cleaning the sensor..........................50 11 Troubleshooting ............................51 11.1 Return and repair..........................51 11.2 Accessories ............................51 OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual...
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Page 4: About This Document
In addition, the local occupational health and safety regulations and general safety regulations apply. The illustrations in this manual are examples only. Deviations are at the discretion of Baumer at all times. Warnings in this manual Warnings draw attention to injury or material damage. -
Page 5: Labels In This Manual
Name plate Swiss made Ill. 1: Name plate Short item name (OMxx item number) Production date Serial number OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 6: Scope Of Delivery
In addition, you can find the following information, among other things, in digital format at www.baumer.com: Operating manual Data sheet 3D CAD drawing Quickstart Dimensional drawing Connection diagram & pin assignment Certificates (EU conformity declaration, etc.) Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 7: Safety
For further information see www.baumer.com. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 8: Laser
IEC 60825-1 Ed. 3., as described in Laser Notice No. 56, dated May 8, 2019 Products with the following type codes are specified according to laser class 2: OM20-xxxxx.HV.xxx OM30-xxxxx.HV.xxx Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 9: Description
RS485 interface with Modbus RTU protocol The following options are available to you for parameterizing the sensor: RS485 interface with Modbus RTU protocol Teach button on the sensor OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 10: Measurement Field
The following values depend on the zero position: ▪ Output measured values ▪ Switching points Capable of parameterization via: ▪ Modbus RTU ▪ Teach button Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 11: Operating And Display Elements
After shifting the zero point, the digital values before the zero point (closer to the sensor) are output with a negative sign. Distance values behind the zero point (furthermore the sensor) are output with a positive sign. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... - Page 12 Teach-in OK: Green and yellow LEDs light up briefly. Afterwards, the sensor returns to oper- ating mode. ü Teach-in not OK: Yellow and green LEDs blink simultaneously with 8 Hz. Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1...
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Page 13: Modbus Rtu
Switch Point 1 Far threshold of the switching output Switch Point 2 Near threshold of the switching output Switch Mode Select switching mode Hysteresis Width Hysteresis Polarity Polarity of the switching output OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... - Page 14 Production code All Measurement Values Measured value and additional information Operation Time: Powerup Operating time since the sensor powered Operation Time: Resetable Operating time since a defined point in time Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1...
- Page 15 Number of bins in the exposure reserve serve: Number of Bins histogram Histogramm Exposure Re- Exposure reserve histogram: bins 1 - 20 serve: Bin 1 - 20 Also see about this 2 Functions [} 26] OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual...
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Page 16: Dimensional Drawing
Description Baumer Dimensional drawing 34,5 31,6 Teach-in Ill. 3: Dimensional drawing OM20 40,3 13,6 Teach-in Ill. 4: Dimensional drawing OM30 Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 17: Transport And Storage
Storage temperature: -10 ... +60 °C Ambient humidity: 20 ... 85 % When storing for longer than 3 months, regularly check the general status of all parts and the packaging. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 18: Installation Instructions
Installation instructions Baumer Installation instructions INFO You can find the suitable installation accessories on the Baumer website. Go to www.baumer.com for this. Then enter the item number of the sensor in the search field of the website. For measurement objects with shiny surfaces: Tilt the sensor 6 to 10° to the side so that the light directly reflected by the surface does not hit the receiver of the sensor. - Page 19 ü û Mounting for round measurement objects: Align the sensor on the same axis as the measurement object to prevent reflections. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual...
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Page 20: Electrical Installation
BU – Blue BK – Black Connecting the sensor to electricity Instruction: a) Ensure that the system is disconnected from power. b) Connect the sensor according to the pin assignment. Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 21: Commissioning
LED function SSC1 - Alarm Local User Interface Local Teach Mode XPert Button Time Out 5 min Type OM20-P0026.xx.xxx: SSC1 Param.SP 1 = -2 mm Type OM20-P0026.xx.xxx: SSC1 Param.SP 2 = +2 mm OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 22: Set Up Rs485 Interface With Modbus Rtu
204 - 205 float32_t Measurement rate [Hz] uint16_t Exposure reserve 207 - 208 uint32_t Response delay [µs] 209 - 210 uint32_t Time stamp [s] 211 - 212 uint32_t Time stamp [µs] Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 23: Measured Value And Additional Information
The distance value in address 202 and 203 can also be read individually. For this, read out reg- ister 202 with register number 2. A single readout of the distance can reduce the transmission time. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 24: Measurement Rate
During ongoing operation: Check the front panel of the sensor for contamination – if the ex- posure reserve decreases over time, it may be an indication of increased contamination of the front panel. Use the histogram function for this purpose (Histogram function [} 44]). Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 25: Response Delay
Dark objects to be measured reflect less light and thus need longer exposure times than light-colored objects; the response delay increases. Trigger Output Measurement Calculation Response delay Ill. 5: Response delay INFO Filter settings do not affect the response delay. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 26: Functions
Address 1101 – Modbus baud rate ID: Number of Address Access registers Data type Description 1101 Read/write uint8_t Set or read out baud rate: 0 = 38400 1 = 57600 2 = 115200 3 = 230400 Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 27: Filter
The median value is the mea- sured value located right “in the center” if the measured values are sorted by size. Time Ill. 6: Moving Median filter Raw data Data after filtering with Moving Median OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 28: Ill. 7 Moving Average Filter
When several sensors are calculated, for example, for thickness measurement, the Standard fil- ter should always be chosen to obtain a raw measured value of both sensors for further calcula- tions. Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... - Page 29 Address 103 – Custom Average Filter Length: Number of Address Access registers Data type Description Read/write uint16_t Only possible with filter setting Cus- tom. Configurable filter length – Average Filter: Min. length: 1 Max. length: 256 OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual...
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Page 30: Trigger Mode
0: Free Running 2: Interval Address 402 – Fix Time Trigger Intervall: Number of Address Access registers Data type Description 402 - 403 Read/write uint32_t Numerical time interval in Interval mode [µs] Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 31: Zero Position
Numerical zero position [μm] Address 185 – Teach Zero Position: Number of Address Access registers Data type Description Write Teach zero position: Call up the function by writing any number. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 32: Measurement Range
Measurement range limit far [mm] Address 220 – Meas Range to MAX: Number of Address Access registers Data type Description Read Maximize measurement range: Call up the function by writing any num- ber. Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 33: Invalid Value Handling
Interpretation: Invalid measured values are ignored at the digital output. The last valid value is maintained during the time period. Digital output Hold Time Hold Time Signal quality Ill. 9: Invalid Value Handling – example 1 OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... - Page 34 Modbus RTU command – holding register: Invalid Value Handling Address 800 – Dropout Timeout: Number of Address Access registers Data type Description Read/write uint16_t Interval for suppressing invalid mea- sured values [ms] Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1...
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Page 35: Switching Points
302 - 303 Read/write float32_t Near threshold Address 304 – Switch Mode: Address Access Number of registers Data type Description 304 - 305 Read/write int32_t Select switching mode: 0: Point 1: Window OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 36: Polarity
Modbus RTU command – holding register: polarity Address 38 – Polarity: Number of Address Access registers Data type Description Read/write uint8_t Polarity of the switching output: 0 = Active low 1 = Active high Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 37: Hysteresis
The Hysteresis prevents unwanted switching of the switching output. The parameterized value of the hysteresis is the difference in distance between the points at which the switching output is activated and deactivated. Baumer recommends always setting the hysteresis not equal to 0. Positive hysteresis... -
Page 38: Ill. 17 Behavior Of The Switching Output In Point Mode (Positive Hysteresis)
Ill. 17: Behavior of the switching output in point mode (positive hysteresis) Negative hysteresis: Switching point P1 Hysteresis High Active low level Level Ill. 18: Behavior of the switching output in point mode (negative hysteresis) Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 39: Ill. 19 Behavior Of The Switching Output In Window Mode (Positive Hysteresis)
Ill. 20: Behavior of the switching output in window mode (negative hysteresis) Modbus RTU command – holding register: hysteresis Address 306 – hysteresis: Number of Address Access registers Data type Description 306 - 307 Read/write float32_t Hysteresis [mm] OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 40: Function Of The Led
Green LED blinks with 2 Hz. Result: ü Teach-In ok: Sensor goes back to the operating mode. ü Teach-in not OK: Green and yellow LEDs blink simultaneously with 8 Hz. Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 41: Switching The Laser On And Off
Modbus RTU command – holding register: laser Address 410 – Laser On/Off: Number of Address Access registers Data type Description Read/write uint16_t Status of the laser: 0 = off 1 = on OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 42: Resetting The Sensor
Data type Description 1066 Read/write STRING[] Enter function of the sensor. Address 1082 – Location Tag: Number of Address Access registers Data type Description 1082 Read/write STRING[] Enter location of the sensor. Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 43: Diagnostic Data
Modbus RTU command – holding register: operating time Address 1001 – Reset Operation Time Number of Address Access registers Data type Description 1001 Write Reset operating times: Call up the function by writing any number. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... -
Page 44: Histogram Function
< 100 mm Bin 3 100 mm < 125 mm Bin 4 125 mm < 150 mm Bin 5 150 mm < 175 mm Example of a recorded distance histogram: Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... - Page 45 Reset histogram (distance): Call up the function by writing any number. NOTICE Reset the histogram after the zero position has been moved (the measured distance depends on the zero position). OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual...
- Page 46 Value range max. measurements Bin 1 < 5 Bin 2 < 10 Bin 3 < 15 Bin 4 < 20 Bin 5 < 25 Example of a recorded exposure reserve histogram: Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1...
- Page 47 Address 1003 – Reset Exposure Reserve Histrogramm Number of Address Access registers Data type Description 1003 Write Reset the histogram (exposure re- serve): Call up the function by writ- ing any number. OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual...
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Page 48: Device Information
Address Access registers Data type Description Read STRING[] Product text Address 95 – Serial Number: Number of Address Access registers Data type Description Read STRING[] Serial number of the sensor Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... - Page 49 Data type Description Read STRING[] Firmware version of the sensor Address 115 – P-Code: Number of Address Access registers Data type Description Read STRING[] Production code of the sensor OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual...
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Page 50: Maintenance
Do not use jets of liquid for cleaning, for example, a high-pressure cleaner. d) Do not scrape off contamination with sharp-edged items. Interior cleaning No interior cleaning of the sensor is required. Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1... -
Page 51: Troubleshooting
Reduce the ambient light (e. g. with a cover). 11.1 Return and repair In case of complaints, please contact the relevant sales company. 11.2 Accessories You can find accessories on the website at: https://www.baumer.com OM20/ OM30 RS485 with Modbus RTU | V1 Operating Manual... - Page 52 Behavior of the switching output in point mode (negative hysteresis) ..........38 Ill. 19 Behavior of the switching output in window mode (positive hysteresis) ..........39 Ill. 20 Behavior of the switching output in window mode (negative hysteresis)..........39 Operating Manual OM20/ OM30 RS485 with Modbus RTU | V1...
- Page 54 Baumer Worldwide Belgium Brazil Canada Baumer SA/NV Baumer do Brasil Ltda Baumer Inc. BE-2260 Westerlo BR-13208-120 Jundiaí, São Paulo CA-Burlington, ON L7M 4B9 Phone +32 14 57 462 0 Phone +55 11 4523-5120 Phone +1 905 335 8444 China France Denmark Baumer (China) Co., Ltd.
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