Factorytalk ME Write to Int

TigerCR1200 · Nov 19, 2015

I am trying to make a global object that will need to have a push button. When the button is pushed it will write a set value to the INT.

I can not find a way to connect to the INT and give it a value on touch. I know this is possible in SE. Is there a way to do this in ME?

I was using a maintained push button and giving the states a value that is written to the INT. This is not an option in a global object since you can't make the value of a maintained push button a parameter.

brendan.buchan · Nov 19, 2015

On the Connections tab under value put your tag name followed by = x.

e.g. {[PLC]tagname} = 10

TigerCR1200 · Nov 20, 2015

Brendan.buchan I wish I would have seen this before I just reworked it. Ill test it to confirm if it would have worked though.

What I did was created a BOOL array that can be used on momentary push buttons. I then run the BOOL through a FOR..DO loop to check for changes and exit out after the INT is set to the correct value.

TigerCR1200 · Nov 20, 2015

brendan.buchan said:
On the Connections tab under value put your tag name followed by = x.

e.g. {[PLC]tagname} = 10

I just tried to do this, it is giving me an error when attempting to do this.

Problem writing value '0/1' to item '{[PLC]tagname} = 10'. So that method does not appear to work. This was using a maintained push button.

dginbuffalo · Nov 20, 2015

brendan.buchan said:
On the Connections tab under value put your tag name followed by = x.

e.g. {[PLC]tagname} = 10

Never tried this, but does it have to be ==10 ??

Helliana · Nov 20, 2015

dginbuffalo said:
Never tried this, but does it have to be ==10 ??

I can't say for sure with Factorytalk View ME, but in most programming languages, == is for comparison and = is for assignment. Since he is attempting to assign the SINT 10 to a variable, my assumption would be that a single = would be the correct syntax.

dginbuffalo · Nov 20, 2015

Helliana said:
I can't say for sure with Factorytalk View ME, but in most programming languages, == is for comparison and = is for assignment. Since he is attempting to assign the SINT 10 to a variable, my assumption would be that a single = would be the correct syntax.

Not sure either, but what you wrote makes sense.

Mike_RH · Nov 20, 2015

In ME, use a pushbutton object and on the General tab for the button, set the Button Action to Value.
Then on the states tab, set the value for each state.

cwal61 · Nov 20, 2015

You can't write 10 to a BOOL.

The Interlocked push button will set a value to a tag.

You might also want to check out the Macro Button. It is located under Objects/ Advanced tab. The Marco Button also has a variable option. Click the Help button on the Macro Button property page for details.

Mike_RH · Nov 20, 2015

The OP is not writing to a BOOL, he is writing to an INT.
At least according to the first post.

danatomega · Nov 20, 2015

TigerCR1200 said:
I just tried to do this, it is giving me an error when attempting to do this.

Problem writing value '0/1' to item '{[PLC]tagname} = 10'. So that method does not appear to work. This was using a maintained push button.

Looks to me as though he was trying to write a bool with the '0/1' thing in his error message.
He did say he made a BOOL array.

brendan.buchan · Nov 20, 2015

Hmm I was sure I have used my solution before and it worked. Maybe I got something wrong, only did a quick check and posted that as I was leaving work for the week so carefactor was at its weakest.

I think Mike is onto it with setting the button action to 'value'.

Geospark · Nov 20, 2015

Have a look here, if you can...

47307 - Creating Global Objects with Parameters in FactoryTalk View ME
Access Level: TechConnect

Regards,
George

Factorytalk ME Write to Int

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