Melexis MLX90601 User manual

User Manual

MLX90601 Configuration Board

390129060101 Page 1 Aug-01

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Introduction

The MLX90601 Configuration board is designed to support the MLX90313 based Infrared Thermometer

modules. For example the MLX90601C Infrared Thermometer Module can be configured using the

configuration board and software.

The hardware board acts as an interface between the RS-232 computer link and the module’s SPI

interface. Also it supplies the supply voltages to the module.

The accompanying software will greatly simplify the configuration of the module. It allows the user to

change output options, use other temperature ranges, save and retrieve configuration settings to disk, set-

up the comparators and more. For all inside information of the MLX90313 programmable IR sensor

interface, please refer to the MLX90313 datasheet.

User Manual

MLX90601 Configuration Board

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Getting started

Unpacking the system

The package comes with:

the configuration board

a serial cable to connect to a PC

software and documentation on a 3.5” floppy disk

Note that it is advised to check for latest software updates at www.melexis.com

System requirements

80486 processor or above

16 MB RAM

2 MB free hard disk space

Windows 95/98,Windows NT or Windows2000

Power supply

To power the board you need a 15 – 30 volts AC or DC power supply (not included) with 3.5 mm

barrel connector. Alternatively you can use the screw terminals for connecting the power

supply. Connected thermometer modules take power supply from the configuration board and

don’t need any other supply voltages. The power consumption of the board with module is less

than 100mA.

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Hardware description

The main features of the board are shown in picture below.

The pin-out of the 10-pole header for module connection is:

REL

SUPPLY

DOUT

CLK

VREF

GND

DIN

IROUT

TEMPOUT

Where:

pin name description

1 REL relay driver output

2 GND ground supply pin

3 SUPPLY module supply pin

4 DIN module data in

5 DOUT module data out

6 CS chip-select

7 CLK communication clock

8 IROUT IRout pin

9 VREF analog reference voltage

10 TEMPOUT Tempout pin

!Note the polarity when mating the flat-cable connector to the board header.

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MLX90601 Configuration Board

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Setting up the hardware

In order to have your setup quickly up and running, follow these point by point steps:

(1) first, connect the module to the flat cable like the picture shows. Pin1 is at the right side of

the connector on the module.

(2) connect the other end of the flat cable to the Configuration board. The pin 1 indicator* on the

flat cable connector must match the pin 1 indication on the board.

* Pin 1 indicator on the ribbon cable connector is a small triangle

(3) Connect the power supply. Note that all LEDs remain off at this point.

(4) Connect the serial link RS323 cable between the board and computer. Any serial port

assigned COM1 to COM8 will do.

(5) Check if the jumper is mounted. If not put the jumper over the 2 pins.

(6) Start the software. If the software is not yet installed, install it first.

(7) Select Module ➥

➥➥

➥Monitor from the main menu. A window pops up showing a readout of the

current temperature. If the reading is incorrect, change the calibrated ranges. See software

section below.

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Installing the software

Before installing the software, always make sure to check for updates at www.melexis.com.

Locate and run the installation file “90313config.exe” on floppy, CDROM or the World Wide

Web. After agreeing to the legal notices, the application will install itself onto your system.

Note: The application is a 32 bit executable, and will not install onto a Windows 3.1 system.

Uninstalling the software

To remove the software from the computer:

click the start button, go to settings

click control panel

select “add/remove programs”

You will see now a list of installed programs that can be uninstalled automatically by windows.

Select 90313Config from the list and press the add/remove button.

The application will now be removed from your system.

If any problem should occur, please contact the technical support.

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How to use the software

Overview

The MLX90313 datasheet describes completely how to change the operation of the modules.

However, most users will find it much more convenient to use the configuration board. The

software package, in combination with the configuration board, allows you to change all internal

settings without effort. It is also possible to change the temperature ranges and modify the

calibration to a certain extent.

Preferences

Changing the temperature units

From the menu, select Preferences ➥

➥➥

➥Temperature Units. You can now choose to use

degrees Celsius, degrees Fahrenheit or Kelvin. It is advised to change the display units before

using any other features, as some displayed values might not be updated. Note that the default

is degrees Celsius, and cannot be changed.

Selecting the communication speed

In combination with the 90601 Configuration Board the default setting of 38400bps must never

be changed. However to keep compatibility with other hardware it is possible to change the

communication speed to 9600bps or 19200bps. To do this select Preferences ➥

➥➥

➥

Communication Speed from the menu.

Selecting module power supply mode

The module receives it’s power supply from the configuration board. The supply voltage can be

5 or 12 volts. To do this select Preferences ➥

➥➥

➥Supply Voltage from the menu. There are 3

supply voltages available :

5V-leave ON: the power supply is left on the module after communication.

5V-switch OFF: 5volts supply, the power supply is switched off after communication.

12V-switch OFF: 12volts supply, the power supply is switched off after communication.

Note the 12V is not available, as standard 5V modules can be destroyed by applying 12 volts.

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Displaying measured temperature on the screen

Let’s start simple. Make sure the Configuration Board is completely hooked up and powered.

Connect to module to the configuration board. Start the software.

Select Module ➥

➥➥

➥Monitor.

The computer will now scan the RS232 serial ports of the computer in order to find the

configuration board. Depending on which serial port (COM1 to COM8) the board is connected,

this may take up to 10 seconds. When the configuration board is found, the screen will look like

the picture at the side.

Your display now shows the current temperature as measured by the thermometer module. You

can switch between object and ambient temperature by clicking the displayed value. The

temperatures shown at the start and end of both gauges should correspond with the calibrated

temperature ranges of your module. If this is not the case, the displayed temperature will be

incorrect. Refer to section Rescale Ranges to change the calibrated temperature settings.

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You may also want to change the display. You can modify several visual settings by choosing

Preferences from the monitor’s menu.

Rounding

Selects rounding to a tenth, a half or a whole

temperature unit.

Filter length

The displayed value is the average of a number of

points. Use the slider bar to change to number of points.

Display update rate

Selects how many times per second the reading on the

display is updated. Note that the gauges are updated

every time the temperature is read from the module.

Reading rate

Set how many times per second the actual temperature

is read from the module.

Downloading, uploading and saving the configuration registers

Make sure the monitor window is closed, otherwise the menu options will not be active.

Before you can see how the module is configured, you need to get the configuration memory

contents form the module to the PC. Selecting Module ➥

➥➥

➥Download will initiate the

communication screen.

Make sure the module is connected. Push the button to start downloading the configuration

contents. You now have the module data copied to your computer. You now can review and

modify the configuration and save for later use. Use File ➥

➥➥

➥Save as for saving the configuration

data. Similar, you can retrieve a configuration setting from disk using File ➥

➥➥

➥Open.

Programming the module is done by selecting Module ➥

➥➥

➥Upload. After uploading the data,

programmed data will be verified automatically.

Be sure to make a backup copy (Module ➥

➥➥

➥Download and File ➥

➥➥

➥Save ) before uploading

ANY data to the module. Writing to the module may result in loss of functionality . Without

backup copy your module may become useless!

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Viewing configuration registers

After downloading the configuration setting from a module, or retrieving the configuration data

from disk, you may want to change the register contents by hand. For viewing the registers you

can click: Configuration ➥

➥➥

➥Eeprom Registers.

The first column shows the eeprom address, the second the register name, the third the

hexadecimal register content, and the last column shows the value without the hamming bits.

The hamming bits are grouped into the 5 last bits of the register content. To modify the register

contents, you have 2 options. You may change the hex value field. In this case you must enter a

hamming coded number. Refer to 90313 datasheet for details. Alternatively the user can change

the source value. In that case the computer calculates the hamming bits for you. Note that you

must enter the entry with the “enter” key, otherwise changes may be discarded. In both cases,

hexadecimal numbers must be preceded by the dollar ($) sign.

Once you have changed the configuration registers, you can upload the configuration data to the

module using the upload utility. Be sure to create a backup file of the original settings.

Overwriting some addresses by accident can cause the module to become useless.

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Changing the output options and comparator setup

If you like to change the output options, you can use the configuration screen by selecting

Configuration ➥

➥➥

➥Mode Settings.

Using this you can easily select the output option you require. Also the comparators can be set

up.

IRout/Tempout function: selects what this

pin must do. If you select “Comparator1

Set point Input” as IRout function, the

comparator will always discard the

eeprom threshold value and use the

external applied threshold voltage.

Comparator Mode: Selects whether the

output is inverted or not. In non-inverting

mode the Relay pin driver is off until the

source value is higher than the threshold

value. Comparator2 output stays low until

the source value is higher than the

threshold value.

Source: Determines what signal the

comparator works with.

Threshold – Hysteresis: eeprom stored

threshold and hysteresis. The threshold is

defined as the mean between the high

threshold and the low threshold. The

hysteresis is the difference between high

and low threshold. If only one threshold is

required, hysteresis must be set to zero.

For the example given, comparator1 high threshold is 40C, and the lower threshold is 30C. To

become effective the settings need to be uploaded to the module.

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