Setting range limits in a variable until temp. is reach.

[LARG]

This is a furnace that goes up to 1500 C,
I am looking for a function that will allow me to do the following:

I have 4 variables each with their own range of limits for normal operation.

Variable 0: Room temperature to set point, the furnace is WARM UP ( variable two and three are off)
Variable 1: If all temperatures they are with in + - 5 degrees, the furnace is READY to run parts.
Variable 2: If any of the temperatures are more than + - 10 degrees, an Alert message will pop up on the screen.
Variable 3: If any of the temperatures are more than + - 20 degrees, an Alarm message will pop up on the screen and turn off the heat. COOL DOWN

PROBLEM:
I need to look for the variable two and three only when the variable one is reach.

[AJL]

LARG,
You could put variables 2 and 3 in a case that is driven by Variable 1. When Variable 1 is not met, you can through an empty (False)case but when the condition for variable 1 is met, you can check variables 2 and 3 in the True case.

Hope this helps,
AJL

[LARG]

thanks you, i will try tonight.

[LARG]

The problem is the variable one is less than variable two and three, so I will never get any alerts or alarm.
the furnace take 45 min. to reach setpoint

[AJL]

Sorry I didn't full understand the requirements. For a second attampt at solving your problem, you could try a notifier to tell the code variables 2 and 3 are in to start only after the conditoins for variable 1 are met. This will cause the code for variables 2 and 3 not to run until variabel 1 is met then whatever happens to variable 1 the code for variables 2 and 3 will continue to run.

Hope this will help.

AJL

[LARG]

well i did try to used a notifier, but i am new user, and i was not enable to do it. did you have an example that could download from the web.

thanks very much

[Matt_F]

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@LARG wrote:
well i did try to used a notifier, but i am new user, and i was not enable to do it. did you have an example that could download from the web.

thanks very much

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Hello LARG,

The following links should help demonstrate how to use notifiers.

What Is a Notifier?

Wait for All Notifiers

Notification with 3 Parallel SubVIs