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Using the K’NEX Interface away from the computer

There are two distinct modes of operating the K’NEX Interface
  1.  It can be used connected to the computer and operated as an ordinary real-time control interface 

with the K’NEX Computer Control software performing the processing of a program. 

  2.  It can run a program that has been created while disconnected from the computer. The program is 

stored and processed by a microprocessor in K’NEX Interface. 

     The program is stored in non-volatile memory so even if the power is disconnected or turned off; 

the program will not be lost. When the power has been reconnected, press the GO button on the 

K’NEX Interface and the stored program will run.

    The microprocessor in the K’NEX Interface can be reprogrammed repeatedly.

 Stored program limits

There is a 256 byte memory limit to the size of the program that can be downloaded to K’NEX 

Interface. The size of a program entirely depends on its complexity. For the simplest program (one 

start, switching single outputs on or off with the same wait value) the interface will accept a maximum 

of about 170 symbols.

Note:  When you ‘test compile’ or ‘compile and download’ your program the memory used indicator will show an 

approximation of the amount of memory used (see page 13).

There are also some program limits to a program for download and if they are exceeded an error 

message will be displayed. 

  • Use a maximum of 4 flowcharts (Starts) 
  • Use only Variables x and y 
  •  Use a maximum of 16 different valued Wait commands (If ‘Wait 2 seconds’ is used 5 times in a 

program then this will be counted as one value of wait. If ‘Wait 1’, ‘Wait 2’ and ‘Wait 3’ are used this 

will count as three values of wait)

  •  Use a maximum of 16 different constants 
  •  Use a maximum of 16 different Procedures (If ‘Procedure: Flash’ is used 3 times in a program then 

this will be counted as one procedure. If three different procedures are used they will count as 

three procedures)

  •  Motor speed control variables are not suitable 
  •  Sound commands are incompatible
  •  Binary input commands are incompatible. Binary output commands can be used but will not 

reduce program size. 

 Download Program Limits 

Select Limit to Download from the Settings menu to limit the options available to only those that can 

download. 

For example:  Only the variables 

x & y can be downloaded and run from the interface while it is 

disconnected from the computer. If ‘Limit to Download’ is checked then only the x and y 

variables will be made available.

back to Table of Contents

Содержание 79018

Страница 1: ...1 888 ABC KNEX Education 79018 9 AGE EDAD GE ALTER K NEX COMPUTER CONTROL User s Guide for K NEX Interface Computer Control Software...

Страница 2: ...should be examined periodically for potential hazards any potentially hazardous components should be repaired or replaced The toy must only be used with the recommended transformer The transformer is...

Страница 3: ...14 Downloading a program to the K NEX Interface 15 Running a program while disconnected from the computer 15 Technical specifications 16 Troubleshooting 16 Warranty 17 Table of Contents K NEX Compute...

Страница 4: ...s 29 Running a control program 29 The Symbols 30 Switch Motor 32 Sound 32 Binary Output 33 The Process symbol 34 Wait 35 Procedure 35 Make 36 The Decision symbol 38 Is Input 38 Is Sensor 39 Is Variabl...

Страница 5: ...cence conditions copyright information and disclaimers 53 K NEX Education s policy is to continually improve products and services so we reserve the right to make changes without notice It is acknowle...

Страница 6: ...omputer to control electrical devices e g lights buzzers and motors This may also involve the use of switches as input devices An interface box such as the K NEX interface is required to interpret the...

Страница 7: ...ddly toys that demand attention In the modern industrial world the ability of computers to repeat both easy and complex instructions precisely and endlessly is harnessed to control production lines an...

Страница 8: ...via a USB lead A green power GO light On the top of the interface To indicate whether interface is being supplied with power or if a program is running A GO push button switch On the top of the interf...

Страница 9: ...he USB port on a computer the USB drivers will need to install Connect K NEX Interface to the USB port on your computer Windows will automatically detect a new device and install the necessary drivers...

Страница 10: ...GO button once so it is solid Connect the K NEX Interface to the computer using the USB cable Start the K NEX Computer Control software Click on the Connect icon to establish connection to the K NEX...

Страница 11: ...several Input and Output devices to use with the K NEX Interface to control the K NEX models Input and Output devices are easily connected to the interface Only the devices included in this set should...

Страница 12: ...ative and the right socket A2 positive If the motor is switched reverse the LED indicator goes red switches the left socket A1 positive and the right socket A2 negative Commands in the K NEX Computer...

Страница 13: ...yellow black Switch the switch to an On position e g if using a push button press the button and watch the indicator LED next to the relevant input on Interface light up when the switch is ON A switc...

Страница 14: ...or compile and download your program the memory used indicator will show an approximation of the amount of memory used see page 13 There are also some program limits to a program for download and if t...

Страница 15: ...le or compile and download your program the memory used indicator will show an approximation of the amount of memory used To download the program 1 Select the Download icon from the toolbar 2 Click on...

Страница 16: ...n I get a Communications Error Could not connect to the interface message 1 Disconnect the power supply re connect and try again 2 Check that the interface is powered and the green LED is on 3 The USB...

Страница 17: ...the Output socket on the Interface is lit The Interface is attached to a power source There isn t a loose connection If you are using a buzzer that the leads are connected correctly red to positive bl...

Страница 18: ...18 www knexeducation com The K NEX Computer Control Software User Guide back to Table of Contents...

Страница 19: ...within an educational context to a control project that helps the student to understand a problem that the student can identify with be it from first hand experience or via a subject area they are int...

Страница 20: ...prior to the application install This may extend the installation time significantly Installing the K NEX Computer Control Software USB Interface users Make sure K NEX Interface is not connected to th...

Страница 21: ...un a select Program Level window will automatically open Select user Level 2 In Level 1 some of the features of the K NEX Computer Control Software are hidden These include all references to Variables...

Страница 22: ...hen maximized to restore down to standard size Right click in window to change the quality of the picture or print the SCE For information about the SCE description and tasks To show or hide output la...

Страница 23: ...sing the motor controls If no interface is connected then an Input a Maybe switched on or off by clicking on the hot spot on the SCE The SCE will duplicate the way a switch should react e g The bridge...

Страница 24: ...new control program Save your control program Set the display options Go or Stop the control program running Run through a program step by step Hide show the flowchart view of the program Flowchart pr...

Страница 25: ...will check for feedback from an input switch or sensor or the value of a variable to decide YES do this or NO do that See page 38 Stop use to end a flowchart or procedure See page 41 Flow Line use to...

Страница 26: ...in the box alongside the input number the box will color up Click back in the box to switch off With Sensor inputs without the interface connected either use the up down arrows next to the relevant se...

Страница 27: ...ntering commands If the Selection icon isn t already active click to select Click on the symbol you require in the symbol toolbar it will highlight to show it has been selected Move the mouse over int...

Страница 28: ...symbols in the edit area together to show the order in which each symbol command should be carried out the direction of the flowchart 1 Click on the Flow Line icon 1 2 Click on the first symbol 2 usu...

Страница 29: ...tart Stop icon To stop the program click on the Start Stop icon This will stop all parts of the program instantly If the program contains multiple flowcharts that begin with the Start command all will...

Страница 30: ...rrent choice in the selection panel To delete a symbol or line with Selection active click on the symbol or line it will highlight to show it is selected and click on the Delete icon The Start symbol...

Страница 31: ...rt and cannot be run on its own A procedure allows specific parts of a flowchart to be programmed in isolation The flowchart can then call up these procedures and repeat as required All procedures mus...

Страница 32: ...ny sound file in a wav mp3 or wma file format Click on the Browse button Locate and select the sound file to be used Select whether the sound file will start and play once default play and wait play a...

Страница 33: ...l 2 Binary Output uses an 8 bit byte to allow the setting of significant bits from one command These bytes are accessed through their decimal equivalent The Binary Output command is used to switch Out...

Страница 34: ...00000100 4 3 on 0 0 0 0 1 0 0 0 00001000 8 4 on 0 0 0 1 0 0 0 0 00010000 16 5 on 0 0 1 0 0 0 0 0 00100000 32 6 on 0 1 0 0 0 0 0 0 01000000 64 7 on 1 0 0 0 0 0 0 0 10000000 128 8 on To control multipl...

Страница 35: ...s command e g Wait x Note Variables for controlling wait times are not suitable for download to the K NEX Interface Procedure This function is used to call up a previously defined procedure You can sp...

Страница 36: ...chart will be seen by all the other flowcharts and procedures in the control program Most standard mathematical operators can be used within this function etc E g Make x x 5 y 2 Note Variables are int...

Страница 37: ...mbers between 5 6 and 7 A decision symbol can be used to check for a random number Seconds Seconds is a free running timer that starts from zero to give the elapsed time in seconds since a program was...

Страница 38: ...a NO line The first flow line you draw from the symbol will be from the base of the symbol this will normally be the yes line To swap these lines double click on the decision symbol and they will aut...

Страница 39: ...l to less than or equal to symbol The sensor value to use as the trigger In addition to sensor input numbers you may also be offered names these are set by the SCE that is currently connected If Go is...

Страница 40: ...s set to 0 The decimal is created from the byte created by setting the bits to check the inputs The table below indicates the bit pattern and decimal values for the byte when one input is to be checke...

Страница 41: ...he flowchart If there are other flowcharts running multi tasking they will continue un affected Stop at the end of a procedure all procedures must have a stop without one the program will eventually f...

Страница 42: ...already active click to select Click on the Text Tool icon A ghost box will appear move it to the required position for the label click and an empty label will appear Type the required text in the di...

Страница 43: ...view your whole control program select the Map tab Right click in the map area and scale to view e g Auto When a control program is run the symbol which represents the point that the program has reac...

Страница 44: ...xtremely long programs that seem to scroll down the page forever Procedures can also be used effectively where something needs to be repeated a set number of times By creating a procedure and then cal...

Страница 45: ...he I O panel or SCE to switch them on or off The Switch Output command will automatically appear in the edit area The time between each selection will automatically appear as a wait command To stop th...

Страница 46: ...ct Run xx the current procedure or flowchart s name from the Debug menu Pause and Single Step 1 Click on the Start Stop icon to start your program running 2 When it gets to the part you want to check...

Страница 47: ...icon to start your program running 2 When it gets to the part when the program goes wrong click on the Pause button to immediately stop the program running 3 Select the relevant procedure or flowchar...

Страница 48: ...or 256 bytes of program When you test compile or compile and download your program the memory used indicator will show an approximation of the amount of memory used The size of program that can be dow...

Страница 49: ...in the edit area To select more than one symbol with Selection active hold down the CTRL key and click on each symbol To select the entire flowchart or procedure in the edit area use the Select All o...

Страница 50: ...sed to alter to another location See page 53 for altering the defaults Open To open your previously saved control program either click on the Open icon or select Open from the File menu Locate the cor...

Страница 51: ...ch be scaled to fit onto separate sheets of paper Everything full size to separate sheets will print the selected flowcharts or procedures at 100 scale on separate sheets of paper Print Preview Flowch...

Страница 52: ...mation Connection problems If the interface fails to connect please check the following Is the correct interface selected Is the correct connection selected USB or Serial If serial connection is being...

Страница 53: ...tory to point to the folder you wish to set as the new default Please note on all windows 64bit operating systems references to C Program Files will change to be C Program Files x86 Glossary of comman...

Страница 54: ...re continuing With the repeat command the sound will be played until the flowchart stops running or the stop playing command is used Start Start Name Begins a new flowchart up to 10 starts may exist i...

Страница 55: ...this license may not be amended changed or altered in anyway It may not be translated into another language nor will it be versioned for use on any other computer system No part of the software may b...

Страница 56: ...sed of the possibility of such loss General These conditions supersede any prior agreement oral or written between the licensee and DHG relating to the software Disclaimer The K NEX Computer Control S...

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