"Lock constant value"

Hi,
I have a diagram with many boolean constants in it, which values are
critical. In this case, LabVIEW feature to easily change a boolean
constant value by a simple mouse click is a dangerous source of errors.
Is there a way to "Lock constant value" in LabVIEW ?
Is there any other handy way to shortcut this problem ?
[email protected]

Hi,
if you absolutely have to have a difficult to edit item, the best way is to make it a control, set off to either one side of the panel where it cannot be seen when the software is running, or set it to invisible.
Another option (again requireing the front panel) is to put down a numeric, and set it's data range Max and Min to the same, and put the increment to 0.0. - that way when you do need to change it, you can by going back in and editing the data range, but it's no longer a simple case of clicking on the item. It's a simple matter to take a 0 / 1 and turn it into a boolean (compare it to a 0 / 1!)
Another, more complicated way, is to use the configuration .vi's to load in the constants from a .ini file.
You could also put a free label with a transp
arent background over the top of the constant. (easiest) Makes it more obvious what the constant is for, and stops the designer having the ability to directly click on it.
Finally (and not recommended) is to use a PI constant, and another constant to represent the boolean (again comparing to get the True/False. The reason I don't recommend this is the block diagram can become confusing - why use a PI constant is bound to be asked by the first person to look at it!
I agree, lock constant value would be a nice feature for a future version of LV though.
Hope that helps
S.
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    7839     KING      PRESIDENT           17-Nov-1981     5000          10
    7844     TURNER      SALESMAN      7698     8-Sep-1981     1500     0     30
    7876     ADAMS      CLERK      7788     23-Mai-1987     1100          20
    7900     JAMES      CLERK      7698     3-Dez-1981     950          30
    7902     FORD      ANALYST      7566     3-Dez-1981     3000          20
    7934     MILLER      CLERK      7782     23-Jan-1982     1300          10
    select e.* from scott.emp e, scott.dept d
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    7782     CLARK      MANAGER      7839     9-Jun-1981     2450          10
    7839     KING      PRESIDENT           17-Nov-1981     5000          10
    7934     MILLER      CLERK      7782     23-Jan-1982     1300          10
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    Regards
    Dmytro

  • Capturing constant value data entered at query filter

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  • Adding new constant value to an 'enum' used in a field causes an exception

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    --mark                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

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    Ram
    Assign points if useful

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