Lufft SHM31 - Page 66

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Table of Contents3
Read before Commissioning5
Symbols Used5
Safety Instructions5
Notes on Laser Safety and Laser Classification5
Intended Use6
Incorrect Use6
Brand Names Used6
Item Names and Technical Data7
Labelling7
Technical Data8
Scope of Delivery9
Additional Documents and Software11
Description of the Device12
Basic Principles of the Measurement Method12
Introduction to Assembly and Commissioning12
Sensor Heating13
Generating the Measured Values14
Measured Values (Curr, Avg)14
Normal Mode14
Assembly15
Assembly Instructions15
Connections17
Connecting the Device17
Connector Pin Assignment17
Recommended Cable Shield Connection17
Supply Voltage17
Data Interfaces17
Heating Release17
Commissioning18
Important Information for Commissioning18
Switching on18
Settings over RS232 or RS48518
UMB Configtool.net18
Basic Installation with Configtool.net and a Serial Interface18
The SHM 31'S Sensor Parameters26
Communication over UMB-ASCII 2.029
Syntax29
Checksum29
Examples29
Description of the Data Telegram #1 with an Example30
Angle Adjustment30
Switching from UMB Protocol to ASCII Protocol30
ASCII Command Overview31
UMB Communication37
Factory Settings37
Overview of Measuring Channels37
Communication in Binary Protocol39
Data Frame39
Addressing with Class ID and Device ID39
Example of Creating Addresses39
Example of a Binary Protocol Query39
Status and Error Codes in the UMB Binary Protocol40
CRC Calculation41
Communication in SDI-12 Mode42
Connector Pin Assignment42
Settings for Using SDI-1242
Exiting SDI Mode42
Command Overview43
Setting the Address44
Measured Data Telegrams44
Example: C and M Queries of the SHM 31-UMB45
Buffer Assignment - Basic Data - SHM 31-UMB45
Additional Measuring Commands46
Device Identification Telegram47
Telegram Verification47
Query Measured Value Parameter Command (SDI-12 V1.4)48
Switching Commands49
Unit System Changeover Command49
Device Reset Command49
End Measurement Command50
Start Measurement Command50
Laser on Command50
Laser off Command50
Calibrate Offset and Angle Command50
Calibrate Offset Command51
Switch on Defrost Heating Cycle Command51
Switch off Defrost Heating Cycle Command51
Parameter Setting Commands51
Retrieving the Current Parameter Setting51
Setting the Parameter Setting52
Communication in Modbus Mode53
Modbus Connection and Communication Parameters53
Addressing53
Modbus Functions53
0X03 Read Holding Registers, 0X06 Write Single Register, 0X16 Write Multiple Registers Function53
0X04 Read Input Registers Function55
Checking the Signal Quality59
Application59
Service, Maintenance and Technical Support61
Firmware Update61
Maintenance61
Faults63
Possible Indications of Error on the Snow Depth Sensor63
Potential Interferences that May Affect Correct Functioning63
Error Codes63
UMB Status Codes64
Disposal Information - Within the EU65
Disposal Information - Outside the EU65
Repair / Maintenance65
Technical Support65

Lufft SHM31 - Page 66

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