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Publish FB Inhibited [message #1838763]

Thu, 04 March 2021 17:02

Seimon Williams

Messages: 3
Registered: March 2021

Junior Member

I'm feeling stupid, but can't see where I might have gone wrong... I'm just following the basic tutorial from the 4diac website using the latest downloads:
4diac IDE Version: 1.13.1 Build id: 2021-01-21_1919
forte-1.13.0 linux x86_64

I'm on Step 2, but my PUBLISH block doesn't appear to be publishing. If I 'watch' it I can see that the Status string is showing 'Inhibited' and the QI appears to be FALSE despite setting it to a value '1' in the properties pane.

index.php/fa/40081/0/

There must be something basic I've missed, I've tried running forte as root but no difference.

Any ideas/thoughts gratefully received!

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Re: Publish FB Inhibited [message #1838773 is a reply to message #1838763]

Thu, 04 March 2021 20:09

Alois Zoitl

Messages: 1585
Registered: January 2014

Senior Member

IEC 61499 defines that when QI is set to false that a REQ event should not be considered (i.e., inhibited). Also if QI is false your FB will not be initialized. With that your application can better control when you should send data or send data to different location. For simple tests the simplest solution is to set QI to true.

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Re: Publish FB Inhibited [message #1838813 is a reply to message #1838773]

Fri, 05 March 2021 12:18

Seimon Williams

Messages: 3
Registered: March 2021

Junior Member

Thanks for your reply, but I seem unable to set it to true by default.
I have set the default property value to 1 or TRUE, but when I watch the FB it always shows up as false.

I tried adding a SR that would get set on by the first change of state of Blinky, that was able to set QI to TRUE, but QO is FALSE with the message "NO_SOCKET".

I also tried running forte under gdb, I can see CCommFB::executeEvent is called a few times, but the result of QI() always seems to be false, openConnection() is never hit.