Laser technology Trusense s300 series User manual

LTI TruSense S300 Series Integration Manual 1st Edition

Page 1

Laser Technology, Inc.

TruSense®S300 Series

User’s Manual

LTI TruSense S300 Series Integration Manual 1st Edition

Page 2

LTI TruSense® S300 Series User’s Manual

1st Edition

Part Number 0144958

Information in this document is subject to change without notice and does not represent a commitment on

the part of Laser Technology Inc. No part of this manual may be reproduced in any form or by any means,

electronic or mechanical, including photocopying, recording, or information storage and retrieval systems,

for any purpose other than the purchaser's personal use, without the express written consent of Laser

Technology, Inc.

Unauthorizedduplication, in whole or in part, is strictly prohibited.

Printed in the United States of America

Trademarks:

TruSense is trademark of Laser Technology, Inc. All other trademarks are the property of their respective owner.

Patents:

This product is covered by pending patent applications and/or one or more of the following issued

patents: 5,612,779 and 6,445,444

LTI Contact Information: Laser Technology, Inc.

6912 S. Quentin Street

Centennial, CO 80112

Phone: 1-303-649-1000

1-877-OWN-A-LIT (USA and Canada)

Fax: 1-303-649-9710

Web Site: www.lasertech.com

Email: [email protected]

LTI TruSense S300 Series Integration Manual 1st Edition

Page 3

LTI TruSense S300-Series User’s Manual (0144958) Change Log

Revision History

Date Revision Description of Changes

Original document

Approval History

Date

Revision

Description of changes

LTI TruSense S300 Series Integration Manual 1st Edition

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Table of Contents

1INTRODUCTION...........................................................................................................................................................7

PURPOSE ....................................................................................................................................................................................7

BASICPACKAGE............................................................................................................................................................................7

ACCESSORY ITEMS ........................................................................................................................................................................7

SAFETYPRECAUTIONS ....................................................................................................................................................................7

MOUNTING THE TRUSENSE S300 ....................................................................................................................................................7

2OEM MODELS..............................................................................................................................................................8

3GETTING STARTED .......................................................................................................................................................8

MEASUREMENT TECHNIQUE...........................................................................................................................................................8

Acquiring a Target...............................................................................................................................................................8

Window Application............................................................................................................................................................9

Beam Diameter .................................................................................................................................................................10

Transmit Receive Lens.......................................................................................................................................................10

Measurement Reference...................................................................................................................................................10

Hazardous Locations .........................................................................................................................................................10

Sunlight .............................................................................................................................................................................11

4INTERFACE................................................................................................................................................................. 12

ELECTRICAL ...............................................................................................................................................................................12

I/O..........................................................................................................................................................................................12

MECHANICAL.............................................................................................................................................................................12

ALIGNMENT ..............................................................................................................................................................................12

5CONFIGURATION....................................................................................................................................................... 14

GRAPHIC USER INTERFACE UTILITY .................................................................................................................................................14

CONFIGURE SENSOR TAB .............................................................................................................................................................14

TERMINAL WINDOW...................................................................................................................................................................15

RANGE UNITS TAB......................................................................................................................................................................15

TARGETS TAB ............................................................................................................................................................................16

DATA RATE TAB .........................................................................................................................................................................16

EXTERNAL PORT TAB...................................................................................................................................................................17

EXTERNAL PORT S330 ................................................................................................................................................................17

4-20 MATAB............................................................................................................................................................................17

6SERIAL COMMUNICATION PROTOCOL ....................................................................................................................... 18

DEFAULT SETTINGS .....................................................................................................................................................................18

7SERIALCOMMANDS...................................................................................................................................................21

$AU DISPLAY BOARD AUX BOARD STATUS ...............................................................................................................................21

$BA

RS232BAUD RATE........................................................................................................................................................21

$CL

CONVERT ERROR CODE TO ERROR MESSAGE .......................................................................................................................22

$CO

DISPLAY $GO COMMANDPARAMETERS .............................................................................................................................22

$DB

DISPLAYBANNER ...........................................................................................................................................................22

$DE

ERROR CODE FORMAT ....................................................................................................................................................23

$DM

TARGET MODE ..............................................................................................................................................................23

ADVANCED TARGET DISPLAYS .......................................................................................................................................................24

First, Second, Third ............................................................................................................................................................24

Last Two (Farthest, Second to Farthest) ............................................................................................................................24

First, Strongest, Last ..........................................................................................................................................................24

First, Second, Third, Strongest, Last ...................................................................................................................................24

MEASUREMENTOUTPUTMESSAGES...............................................................................................................................................25

First Target ........................................................................................................................................................................25

LTI TruSense S300 Series Integration Manual 1st Edition

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Strongest Target ................................................................................................................................................................25

Last Target ........................................................................................................................................................................25

First, Second, Third Targets................................................................................................................................................25

Last 2 (Farthest and Second to Farthest) Targets...............................................................................................................25

First, Strongest, Last Targets..............................................................................................................................................25

First, Second, Third, Strongest, and Last Targets................................................................................................................25

$DT

Time Since Power ON ............................................................................................................................................26

$FD Reset Factory Default...........................................................................................................................................26

4-20 Current Loop Setting ............................................................................................................................................27

$GO

Start Distance Measurement .................................................................................................................................27

$HV

High Voltage Status .............................................................................................................................................28

$ID

InstrumentIdentification.......................................................................................................................................28

$IS $IS<CR><LF>.........................................................................................................................................................29

$MA Manual Start ........................................................................................................................................................29

$MU

Change

Measurement Unit...................................................................................................................................30

$OP

Output Precision...................................................................................................................................................30

$OZ

InstrumentTemperature ......................................................................................................................................30

$PD

Power Down and Restart Unit with New Baud Rate ..............................................................................................31

$PE Set Update Period ................................................................................................................................................31

$RD

Set Trip Distance ...................................................................................................................................................31

$SN

InstrumentSerial Number.....................................................................................................................................32

$ST

Stop DistanceMeasurement .................................................................................................................................32

$SU

Save User Settings ................................................................................................................................................32

$TG

RemoteTrigger .....................................................................................................................................................33

$UO

User Offset

............................................................................................................................................................34

$VO

Turn Laser Pointer On (S310 and S330 Only)..........................................................................................................34

$VF

Turn Laser Pointer Off (S310 and S330 Only) .........................................................................................................34

$WU

Warm Up Period ...................................................................................................................................................35

8 APPLICATION REFERENCES............................................................................................................................................. 36

APPLICATIONEXAMPLES ...............................................................................................................................................................36

HARTCOMMUNICATION .............................................................................................................................................................38

SDI-12COMMUNICATION............................................................................................................................................................39

9SPECIFICATIONS ........................................................................................................................................................40

10 ERROR CODES ........................................................................................................................................................... 41

11 TROUBLESHOOTING .................................................................................................................................................. 41

12 CARE AND MAINTENANCE.........................................................................................................................................42

OPERATING TEMPERATURE...........................................................................................................................................................42

MOISTURE AND DUST PROTECTION................................................................................................................................................42

CLEANING .................................................................................................................................................................................42

RETURNING SENSOR FOR REPAIR ...................................................................................................................................................42

13 DIAGRAMS - WIRING AND PINOUTS.......................................................................................................................... 43

7054674 OEM CABLE ...............................................................................................................................................................43

7054671 EXTERNAL CABLE:12 VPOWER DOWNLOAD CABLE........................................................................................................44

4824758

ABLE

NTEGRATION

ABLE WITH

EADS

......................................................................................................................45

7054691EXTERNALCABLE:RUGGEDIZEDENCLOSURE TERMINAL BLOCK CABLE.......................................................................................46

S330 4-20 CABLE WITH OPTIONAL PC CONNECT (1 OF 2) ..................................................................................................................47

S3304-20 RUGGEDIZEDENCLOSURE TERMINAL BLOCK WITH OPTIONAL PC CONNECT (2 OF 2) ..................................................................48

S300 /S310 I/O TRIGGER CABLE WITH OPTIONAL PC CONNECT (1 OF 2)...............................................................................................49

S300/S310 I/O TRIGGER RUGGEDIZED ENCLOSURE TERMINAL BLOCK W/OPTIONAL PC CONNECT (2 OF 2) ...................................................50

S300/S310 SDI-12RUGGEDIZED ENCLOSURE TERMINAL BLOCK WITH OPTIONAL PC CONNECT (1 OF 2).....................................................51

S300 /S310 SDI-12 CABLE WITH OPTIONAL PC CONNECT WIRING DIAGRAM (2 OF 2)............................................................................52

LTI TruSense S300 Series Integration Manual 1st Edition

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DIAGRAMS - MECHANICAL

.................................................................................................................................. 53

RUGGEDIZED ENCLOSURE ...........................................................................................................................................................53

3004956 TANK ADAPTOR..........................................................................................................................................................54

3004960 4INCH FLANGE ..........................................................................................................................................................55

3004957 DUST/SPLASH TUBE...............................................................................................................................................56

77035137 MOUNTING PLATE .....................................................................................................................................................57

1134749 SUN SHADE INDUSTRIAL MOUNT .....................................................................................................................................58

3004959

WIVEL

OUNT

........................................................................................................................................................59

HOUSED MODEL DIMENSIONS WITHOUT LENSES ...............................................................................................................................60

OEM MODEL DIMENSIONS ..........................................................................................................................................................61

9APPENDIX A – RUGGEDIZED ENCLOSURE FOR THE TRUSENSE S300 SERIES ...............................................................62

RUGGEDIZED ENCLOSURE PARTS LIST .............................................................................................................................................64

RUGGEDIZED ENCLOSURE INSTALLATION INSTRUCTIONS &CAUTIONS...................................................................................................66

10 APPENDIX B - DEFINITIONS........................................................................................................................................67

11 APPENDIX C - S300 INTENSITY READING.................................................................................................................... 69

12 APPENDIX D - S3XX OFFSETS .....................................................................................................................................70

13 APPENDIX E - DIFFUSER LENSES................................................................................................................................. 71

14 APPENDIX F - FINDING THE COM PORT ..................................................................................................................... 72

15 APPENDIX G – S300 SERIES CAPTURE LOG GRAPHIC USER INTERFACE.......................................................................74

16 APPENDIX H - GRAPHIC UTILITY CONTRAST COLOR ................................................................................................... 79

List of Figures

Figure 1 Intensity Alignment ................................................................................................................................... 12

Figure 2 Main Utility Page ....................................................................................................................................... 14

Figure 3 Reading Configuration............................................................................................................................... 14

Figure 4 Terminal Window ...................................................................................................................................... 15

Figure 5 Range Units Tab......................................................................................................................................... 15

Figure 6 Targets Tab ................................................................................................................................................ 16

Figure 7 Data Rate Tab ............................................................................................................................................ 16

Figure 8 External Port Tab ....................................................................................................................................... 17

Figure 9 4-20mA Tab ............................................................................................................................................... 17

Figure 10 Tank and Silo Liquid................................................................................................................................. 37

LTI TruSense S300 Series Integration Manual 1st Edition

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1 Introduction

Purpose

This document defines and provides the means to control the interfaces for the Laser Technology TruSense S300

series laser sensors for the following configurations:

 S300 = TRIG, SDI-12, RS232 without alignment laser

 S310 =TRIG, SDI-12, RS232 with alignment laser

 S330 = 4-20 HART, RS232 with alignment laser

This manual represents the S300 Series models. S300 is used as a generic term for all S300 Series

models.

BasicPackage

 S300 Series Sensor or S300 OEM Sensor

 Communication Cable with Flying Leads

 LTI Limited Warranty

Accessory Items

 Power/Comm Cable

 Universal Mounting Plate

 Diffuser Lenses

 Sun Shade

 Swivel Mount

SafetyPrecautions

•Avoid staring directly at the laser beam for prolonged periods. The TruSense S300 is designed to

meet

FDA eye safety requirements and is classified as eye safe to FDA (CFR21). Note: The

TruSense 310 and S330 have a Class 2 Alignment Laser that is not rated eye safe. Class I 7

mm limits, which means that virtually no hazard is associated with directly viewing the laser

output under normal conditions. As with any laser device, however, reasonable precautions

should be taken in its operation.

•It is recommended that you avoid staring into the transmit aperture while firing the laser. The

use of optical instruments with this product may increase eye hazard.

•Do not use the laser within 15 meters (50 feet) of a prism. The reflective energy from a prism

within this range can oversaturate the laser receiver, resulting in permanent damage to the

sensor.

•Never point the instrument directly at the sun. Exposing the lens system to direct sunlight, even

for a brief period, may permanently damage the laser transmitter.

•Effective for the S310 and S330 only: The Class 2 Alignment Laser Exit Aperture is located on

the upper portion of the Front Plate between the Transmit and Receive Lenses of the Class 1

Measurement Laser:

ALIGNMENT LASER = CLASS 2

MEASUREMENT LASER = CLASS 1

Mounting the TruSense S300

IMPORTANT!

When mounting the S300, always use a washer between the housing feet and the screw head.

Do not exceed 5 inch-pounds of torque when securing.

For more information on S300 accessories,

please visit:

http://www.lasertech.com/Laser-Sensors.aspx

LTI TruSense S300 Series Integration Manual 1st Edition

Page 8

OEM Models

Due to the sensitivity of the OEM models, LTI recommends all ESD, Electrostatic Discharge procedures as

outlined in ANSI/ESD S20.20, ESD Association Standard for the Development of an Electrostatic Discharge Control

Program for Protection of Electrical and Electronic Parts are followed whenever handling an OEM sensor.

2 Getting Started

•LTI recommends getting familiar with the

sensor operation and configuration in a

controlled environment.

•After unpacking, power on the unit with the

supplied cabling and connect the DB9 pin

serial connector (optional) to a serial I/O

device such as a PC.

•A DB9 to USB adaptor is required if the PC

does not have a DB9 serial port available. A

ready to use power and communication

cable is available from LTI, see Accessory

Items from previous page.

•Connect using either the supplied Interface

Software or a terminal emulation program

such as HyperTerminal.

•Default=115200 baud rate, no parity, 8

data bits, 1 stop bit, no flow control.

Sensor Performance

LTI sensors come with a variety of target mode and configuration settings than can optimize the sensor

to a particular application and set of conditions. This set up flexibility is one of the primary advantages

of LTI sensors. LTI’s algorisms with respect to target discrimination, target acquisition and target

extraction are what set it apart from other laser sensors.

Measurement Technique

Acquiring a Target

The S300 uses infrared laser light to measure distance. This invisible light is emitted from the transmit

lens of the sensor, reflects off of the target and returns to the receive lens of the sensor. The exact

distance is then calculated by comparing the return time to the speed-of-light constant.

The ability of a laser sensor to measure to a target depends on the target’s reflectance and any

interference between the sensor and target such as dust, fog, or foliage. Reflectance is determined by

color, opacity, distance, and the reflection angle as well as the density of any ambient interference

between the sensor and the target. For example, a lighter colored target is generally more reflective

than a darker one and thick dust will reduce the signal strength more than light dust.

The S300 is a highly-sensitive precision sensor and can measure to most targets within its range

specification. This includes penetrating light dust or fog using the Last target mode, for instance. A

general rule of thumb when measuring through fog or dust is if you can visually see the target, the

sensor likely can as well. Remember, humans see in the visible light spectrum whereas the LTI laser

sensor utilizes the Infrared spectrum (IR) 905. Certain objects will appear differently in these two

spectrums, which is why the human eye test is only a general rule of thumb and not an absolute test of

what the laser sensor is able to detect.

LTI TruSense S300 Series Integration Manual 1st Edition

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Liquids & Fluids Application

The S300 series sensor is engineered and specifically designed to directly measure all types of fluids,

including those that are highly reflective (such as clear water), turbulent and without regard to their

dielectric properties. The S300 generates reliable results by stabilizing the reflections picked up by the

receiver and by smoothing out the reflective peaks and valleys caused by fluids in random motion.

Optional Beam Diffuser

The optional beam diffuser is available to spread the laser beam wider than the standard 3mrad

divergence. This option is typically recommended when measuring still or turbulent clear liquids. To

enhance performance, in may be also used in the following conditions:

•measuring liquids in random motion

•measuring liquids where mounting the sensor at 90° to the liquid surface

(± 5°) is not guaranteed

The optional beam diffuser is not necessary or should not be used when

measuring over a distance of 50 meters (164 feet), when measuring down a long

and narrow stilling well or bypass pipe, or when other obstacles such as pipes, mixing blades, etc. are

located very close to the sensor’s beam.

Window Application

When measuring through a window, ensure the face plate of the sensor is 3 mm or closer to the window.

Reflections will increase with a larger gap and could result in measurement error. This is due to

“crosstalk”. Crosstalk occurs when a reflection from a very close reflector like a window is combined with

the actual target reflection and could lead to an inaccurate measurement.

Borosilicate glass typically works well. Also, there is no degradation using plane glass or even plastic.

Soda lime glass will not give the best results.

Typically, a transmission of over 90% is desirable. Through uncoated glass, there is about a 4%

reflection loss on each surface of the glass (a total of 8% going through the glass), so it’s better if each

side is coated with an anti-reflection coating. This can reduce the reflection loss to close to 0%.

Foam Application

Unless the foam is very low-density and laser light will get through it, the laser will likely measure to the

top of the foam while it is present. However, the use of a stilling well or by-pass pipe can mitigate this

condition. These devices allow the fluids to enter through perforations and reach the same level as the

rest of the vessel, but reducing the amount of agitation and foam that may be present outside of the

stilling well. Another technique to counter foam is to create a small “wash-down” area at the side of the

tank which will clear a small area through the foam, down to the material layer. Shoot the laser through

this spot.

If both the foam layer and the material layer below it are required to be monitored, two separate S300s

can be set up to provide both measurements. For example, one can be used inside a stilling well and

the other outside to measure both targets.

LTI TruSense S300 Series Integration Manual 1st Edition

Page 10

Stilling wells and by-pass pipes are techniques used to calm turbulent fluids in vessels or rapids in rivers,

offering a calmer, cleaner surface to measure to. Often stilling wells can mitigate issues arising from

agitation, flow, foam and other conditions that might compromise accuracy.

Dense Steam Application

The presence of steam is a particularly challenging condition. Like most scenarios, it depends on the

density & composition of the steam and the nature of the surface to be measured: composition, clear or

opaque, still or turbid, etc. A general rule of thumb is that if you can see through it, the laser will be

able to as well.

Beam Diameter

Beam Diameter at the Target = Free Aperture + (Divergence x Range)

Example:

Distance to the Target

= 100 m

Divergence

= 3 mrad

Free Aperture

Beam Diameter at the Target

= 23 mm

= 0.023 + (0.003 x 100) = 323 mm

Therefore, beam diameter is 32.3 cm at 100 m or 12.7 inches at 328 feet.

Transmit & Receive Lens

Viewing the sensor from the front (refer to adjacent

illustration), the transmit lens is on the left side, as

indicated by the red arrow. The receive lens is on the

right side.

Measurement Reference

Distance measurements are from the sensor front plate

to the target as shown in the figure to the right.

Hazardous Locations

LTI recommends using the Ruggedized Housing Enclosure designed to house the S300 (see Appendix A

of the document for more information). This can be mounted to an adaptor and flange for easy

installation in a tank or silo. A dust tube will attach to the adaptor and provides a ¼ X 18 NPT access

for an air tube to provide positive air pressure inside the tube to prevent dust from settling on the

sensor lens.

LTI TruSense S300 Series Integration Manual 1st Edition

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Sunlight

The sunshade accessory is recommended to keep direct moisture and sun rays (heat) from coming in

contact with the sensor. Direct sun rays on the sensor housing can heat the sensor above its operating

temperature.

LTI TruSense S300 Series Integration Manual 1st Edition

Page 12

3 Interface

Electrical

12-24 volt dc.

I/O Default = 115200 baud rate, no parity, 8 data bits, 1 stop bit, no flow control.

Mechanical

Mounting slots are 4 X 3.2mm (0.13 inches), always use a washer and do not exceed 5 inch pounds of

torque when securing.Recommended bolt size is M3, or 4-40.

Alignment

The S300 will output a signal strength (intensity)

reading-1-xxxx,2-xxxx,3-xxxx,4-xxxx

where the

increasing number indicates a stronger target.

Example: To center the sensor on the desired target, slide the sensor in the X and Y direction in order

to determine the location of the maximum signal return. This ensures the target is centered. This

example shows an orange pole with reflective tape wrapped around it. Scan the sensor first in the X

direction and then the Y direction. A higher intensity reading will show on the reflective surface as

shown.

In this example, the beam is centered on the reflector when the measurement is 4-984 in the X

direction and 4-474 in the Y direction.

The signal strength is shown below as the highlighted characters. This number will likely be different each

time but will always return a larger number from a more reflective or stronger target.

Point 1: $DM,S,2.66,M,0,4-420*B76D

S300 Alignment

Figure 1 Intensity Alignment

LTI TruSense S300 Series Integration Manual 1st Edition

Page 13

Outputs for Each Model

I/O

Visible

Alignment

Laser

RS232

SDI 12

4-20

4-20 HART

Trigger

S300   

S310    

S330    

Table 1

LTI TruSense S300 Series Integration Manual 1st Edition

Page 14

4 Configuration

Graphic User Interface Utility

•Top Window Measurement is in

either Meters, Feet, or Yards.

•Bottom Window is Laser Return

Intensity.

•Green “Laser Active”: Laser is firing

•Counter: Measurement count.

•Laser Pointer: Visible Alignment laser

(S310 and S330 models only).

•Bottom Status Bar:Shows model, SN,

serial number, Target Mode, Fluid

Characteristics, and Com Port.

•Terminal: Brings up Terminal Mode.

User can type in commands and see

response as well as scrolling data as the

sensor is measuring.

•Configure Sensor for setup menus.

Configure Sensor Tab

•The Interface will read the

configuration from the sensor.

•A pop up notice will display while the

configuration is being read.

Figure 2 Main Utility Page

Figure 3 Reading Configuration

LTI TruSense S300 Series Integration Manual 1st Edition

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Terminal Window

•User may enter commands in the lower

window. The data scrolls in the main

window.

•Dump Parameters: Scrolls the settings

in the sensor for review.

Note: Serial string at right shows time

since power on; this can be disabled with

$DT command as explained in Section 6

Serial Commands.

Figure 4 Terminal Window

Range Units Tab

•Range Units: User may select measurement

units.

•Short Gate: Allows user to set a short gate

distance.

•Autostart: Enable Autostart for sensor to

automatically begin measuring on power up.

•Offset: Adds or subtracts from overall

measurement.

•Weather Mode: Allows the sensor to eliminate

weather related returns out to a pre-set

distance

•Re-Read Configuration: Reads the unit’s

configuration again.

•Save Configuration: Saves the configuration

to a file, as shown in the appendix.

•Open Configuration: Allows the user to open

a saved configuration file.

•Apply & Save Configuration:Loads the

menu settings to sensor and saves to file.

•Apply: Save menu settings to sensor.

•Exit: Simply exit.

•Restore Factory Defaults: Load settings

from the factory from non-volatile memory.

Figure 5 Range Units Tab

LTI TruSense S300 Series Integration Manual 1st Edition

Page 16

Targets Tab

•Target Selection: Target Discrimination

Menu. User selects target based on application.

•Fluid Characteristics: Will be set for the

agitation level.

•Advanced target displays are available in the

Serial Communication Protocol section.

Figure 6 Targets Tab

Data Rate Tab

•User selects the number of measurements.

•User selects the Delay between Measurements.

User sets Number of Measurements to 1 and

Delay to 0 for maximum update rate of 14 Hz

using these settings.

•Example #1: The user wants an update rate of

5 Hz. Enter 1 for number of measurements and

0.2 (the inverse of 5) for delay between

measurements.

•Example #2: The user wants 1 reading every

10 seconds. They enter 1 for number of

Measurements and 10 for delay between

measurements.

Figure 7 Data Rate Tab

LTI TruSense S300 Series Integration Manual 1st Edition

Page 17

External Port Tab

•This menu only appears when connected to an

S300 or S310 and allows the user to select

Trigger Modes and Trip Distance.

•Allows user to select SDI-12 output.

•Trigger Input –Active Low ($TG,2) The unit will

measure continuous if the $GO command is set

to 0 ($GO,0). The sensor will not respond to

the Stop command ($ST). The user must then

enter “$TG,0” to stop the unit.

•Set Trip Distance allows user to set minimum

and maximum distance for triggering.

•After settings are made, it is necessary to

Apply then Exit.

Figure 8 External Port Tab

External Port S330

•This menu is only active with an S330

4-20 mA Tab

•4-20 mA menu allows the user to set ranges at

4 and 20 scale. The serial command is $FT.

•Error current is set here as well.

•A difference of at least 2 meters (6.6 feet) must

be between the range of 4 mA and 20 mA.

•After settings are made, it is necessary to Apply

then Exit.

Figure 9 4-20mA Tab

LTI TruSense S300 Series Integration Manual 1st Edition

Page 18

5 Serial Communication Protocol

•

Each command and reply starts with a ‘$’ sign and ends with <CR><LF>, CR is carriage return and LF is

line feed. The *XXX is a checksum.

•

Default communication parameters: baud rate 115200, no parity, 8 data bits, 1 stop bit, no flow control.

•

Issuing a mnemonic command without an associated parameter, prompts the S300 to reply with the

current setting of that parameter (examples follow).

•

Before entering a command, issue a Stop command, $ST, and after changing any commands, issue a

Save command, $SU.

•

Upon applying power, the unit performs an initialization and onboard self-test.

•

Two methods for initiating a measurement:

 Serial command request.

 Hardware control via the Ext-Trig control signal.

•

The time for an individual measurement will vary depending on the target mode, target reflectance

and

distance. Targets that are closer and more reflective will return a measurement quicker than

targets that are farther away and less reflective.

Default Settings

$BA,115200

$DB,1

$DE,4

$DM.4

$DT,0

$FT,1.000,30.000,0.0,240,1,4,4,4,4

$MA,0

$MM,0

$MU,M

$OB,0

$OP,64

$PE,0.0

$RD,0.000,9999.999

$TG,0

$WU,1

TruSense S300 Configuration

$GO Command Parameters

$MM,0

Mode: 0

- # Iterations: 1

- Update Period: 0.0

; Measurement Mode = Standard Range

“Default setting $XXXX”

$DM,4

Target Mode = Last Target

“Default setting $XXXX”

$LS,0

Long Range Scan Mode = Do not report weaker targets.

“Default setting $XXXX”

LTI TruSense S300 Series Integration Manual 1st Edition

Page 19

$OP,64

Number of Pulses Per Measurement = 8 interations

“Default setting $XXXX”

$MA,0

Manual Start = Manual Start active.

“Default setting $XXXX”

$TG,0

Remote Trigger = External port disabled.

“Default setting $XXXX”

$MU,M

Measurement Units = Meters

“Default setting $XXXX”

$O0,0

User Offset for Standard Range Measurement Mode = 0cm

$O1,0

User Offset for Extended Range Measurement Mode = 0cm

$OB,0

User Offset for Intelligent Long Range Measurement Mode = 0cm

“Default setting $XXXX”

$DB,1

Display Banner = enabled

“Default setting $XXXX”

$WU,1

Warm Up Period = 1 measurement

“Default setting $XXXX”

$DT,0

; Time Since Power ON = disabled

“Default setting $XXXX”

$DE,4

Error Code Format = Display Error Code with Mnemonic

“Default setting $XXXX”

$PE,0.0

Update Period = 0.0 seconds

“Default setting $XXXX”

$RD,0.000,9999.999

Trip Distance:

- Minimum: 0.000 M

- Maximum: 9999.999 M

“Default setting $XXXX”

LTI TruSense S300 Series Integration Manual 1st Edition

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$FT,1.000,30.000,0.0,240,1,4,4,4,4

Current Loop Settings:

- Range at 4 mA = 1.000 Meters

- Range at 20 mA = 30.000 Meters

- Update Period = 0.0 secs.

- Error Current = If distance < 4 mA, set to 3.5 mA. If distance > 20 mA, set to 24 mA.

- Number of measurements = 1

- HART Parameter: PV = Last Target

- HART Parameter: SV = Last Target

- HART Parameter: TV = Last Target

- HART Parameter: QV = Last Target

“Default setting $XXXX”

$BA,115200

RS232 Baud Rate = 115200

“Default setting $XXXX”

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