help me how to check none value or null value?

This topic has 7 replies, 2 voices, and was last updated 5 years, 5 months ago by Mikhail.

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March 5, 2020 at 12:36 am #6566

ALnaluk
Participant

how to check none value or null value?

https://www.picz.in.th/image/untitled.xelgQv

March 5, 2020 at 3:08 pm #6572

Mikhail
Moderator

Use the Stat function in your formulas.

March 8, 2020 at 3:16 am #6585

ALnaluk
Participant

what is Stat function?
https://www.img.in.th/image/T14fpE

March 8, 2020 at 4:06 pm #6586

Mikhail
Moderator

http://rapidscada.net/doc/content/latest/en/software-configuration/using-formulas.html

March 9, 2020 at 12:27 am #6587
ALnaluk
Participant
i want check the status that without input.do you have examples

if(device = connect){
print = on
}
else
print = off
- This reply was modified 5 years, 5 months ago by ALnaluk.
March 10, 2020 at 7:46 am #6591

Mikhail
Moderator

Formula of the input channel would be:
Stat() > 0 ? 1 : 0

Also you need to select Format = Enum text and Unit = Off-On

March 13, 2020 at 4:37 am #6601

ALnaluk
Participant

i try it on this formula “Stat() > 0 ? 1 : 0” but it is not my request.

https://www.picz.in.th/image/1-po5-87h8zhrgwqpeoafxma.QBKOOQ

March 13, 2020 at 1:59 pm #6605

Mikhail
Moderator

With formula
Stat > 0 ? Cnl : Val()
you can get the last correct value
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