Swtich Logic

[jtc]

Hi,

I am trying to create a VI where I want to keep the last status of a switch. Kindly see the attached sample VI. If I run the VI and put the swtich to Auto (True Status), and re-start my pc, the next time I ran the VI it will show Manual (False Status). I know that I can select the function "Make the current value the default", but similarly if I want to select Manual, the next time I start my pc, it will show Auto.

I hope there is no default. I just want to keep the last status of the Switch whenever I re-start my PC.

Could anyone please teach me how to correct my VI.

Thank you very much.

[K C]

Hi,

You can save the value of your switch in a file and read this file when your start your program.

You can also use .ini files for this purpose.

you can also have a look at: http://forums.ni.com/ni/board/message?board.id=170&message.id=172046&jump=true

Message Edited by K C on 03-08-2006 12:20 PM

[TiTou]

Hi Bong,

there is a way to perform a "make current value default" programatically, so if you do this on your boolean when your VI stops, and then when you re-open this VI the boolean takes the default value you set at the end of the last use 😉

I will try to find an example VI, but you if you search on the forums for "make current value default" or something alike, you will find example.

[TiTou]

There we are

look here and there

[jtc]

Hi,

Thank you for all your replies. I looked on all your attachments and I tried to create my own as attached. I tried to save two kinds of control; numeric and boolean control. For the numeric I dont see any problem, but for the boolean control, it always goes back to the default setting as soon as i hit the save button.

I want to save the last setting i choose for the boolean switch. I would appreciate your kind assistance.

kind regards,

[TiTou]

Hi Bong,

I don't have LV8 so I can't have a look at you code, could you repost in LV 7.1 please ?

just to be sure, check the "mechanical action" of your boolean, if it's a latch, that might be the reason why it's not working, then set it to a "switch" 😉

[jtc]

Hi Titou,

Thank you for your reply.

Attached is the VI in 7.1.

I checked all the mechanical action of the switches.

I tried to make this VI, but I am still having difficulty "keeping the last status of the Switch regardless of its default".

If this VI will not work, can you please teach me a more simple VI with the same purpose. 

Thank you very much.

[TiTou]

Hi Bong,

To do this, I would recomand to use configuration (*.ini) files, check the example code in Help >> Find examples... >> and search for "configuration file".

Or this...

[jtc]

Hi Titou,

Thank you for the reply and the attached VI.

I found a simpler solution. Kindly see the attached. The path that I set is my own file, so please set
the XML file path to your original. This VI now works for me.

Thank you very much for the great assistance.

kind regards,

bon

[TiTou]

Hello Bon,

I'm glad you found your own solution. Congratulations 😉

Best regards.