Enabling an output trigger

**no_hazmats** · 07-18-2010, 06:34 PM

Can someone help me with this?

I'm doing a simple temperature controller. I monitor the water temperature in my car and when it hits a pre-set level, I want to turn on some relays.

I have a screen that displays all my inputs, variables, & outputs, and when I set the controller up in the most straightforward way, it works as intended. But I want to enable the trigger based on the state of an 'enable' screen button.

I compare a Fahrenheit sensor to a number. Next I compare the output of the > comparator to a variable that represent the 'enable' state - based on my button. Then it goes to my output. But my 'then statements' trigger an output when the temp exceeds the threshold regardless of the state of the enable signal.

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Name: logic1.jpg
Views: 126
Size: 15.3 KB

I also tried setting a new variable, but no difference.

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Any ideas what I'm doing wrong?

Thanks,

Shep

**2k1Toaster** · 07-19-2010, 02:42 AM

you need to do "wvo_enable == whatever" tied to the second input of the AND gate

**no_hazmats** · 07-19-2010, 06:29 AM

Originally Posted by 2k1Toaster

you need to do "wvo_enable == whatever" tied to the second input of the AND gate

So, using the debugger it seems that my "Enable" button only sets the variable wvo_enable momentarily. I'm new at this and I reckon I'm a dummy, but I kind of thought when the button was showing the 'pressed' image that it would hold the variable in that state rather than momentarily setting it then returning to its original state.

**2k1Toaster** · 07-19-2010, 04:33 PM

Originally Posted by no_hazmats

So, using the debugger it seems that my "Enable" button only sets the variable wvo_enable momentarily. I'm new at this and I reckon I'm a dummy, but I kind of thought when the button was showing the 'pressed' image that it would hold the variable in that state rather than momentarily setting it then returning to its original state.

If so, then you have a priority conflict. Change the button to high priority and make sure it is "attached" to the vote.