Eclipse Community Forums: 4DIAC - Framework for Distributed Industrial Automation and Control » force value for composite fb doesn't work

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force value for composite fb doesn't work [message #1839746]

Sat, 27 March 2021 03:10

Eclipse User

i t use the logic of single fb, so can't force the value

Re: force value for composite fb doesn't work [message #1839917 is a reply to message #1839746]

Thu, 01 April 2021 02:55

Eclipse User

Hello Joy.
Are you trying to read a static parameter into a Basic Function Block that is inside a Composite Function Block? That usually works as long as there is an event linked to the parameter. I have attached an image of one of my blocks below. The INIT event is linked to the parameter pickup_voltage. When INIT is fired, then the parameter is read in correctly.

The second image shows the configuration of the parameters in 4diac

Is that what you are trying to do?
Kind regards,
Barry

Attachment: Composite Function Block with Static Parameters.JPG
(Size: 68.69KB, Downloaded 81 times)
Attachment: Composite Function Block with Static Parameters_2.JPG
(Size: 63.65KB, Downloaded 91 times)

[Updated on: Thu, 01 April 2021 03:00] by Moderator

Re: force value for composite fb doesn't work [message #1840058 is a reply to message #1839917]

Tue, 06 April 2021 04:37

Eclipse User

Not exactly what i want, when it's running, i double clcik the composite fb, and add all the fbs to watch, then i right click one di of fb, want to set another new value, but it doesn''t work.
i think this logic of composite force value is missing

[Updated on: Tue, 06 April 2021 04:38] by Moderator

Re: force value for composite fb doesn't work [message #1840059 is a reply to message #1840058]

Tue, 06 April 2021 04:52

Eclipse User

Hi Joy,
I think the FB Test functionality in the 4diac IDE is only designed to test Basic Function Blocks, not Composite Function Blocks or SIFBs.

Alois or another forum member may be able to confirm that for us. I do a lot of my testing by putting cout print functions in the C++ code. I have learnt to read the execution chain from the inside. I find it a lot easier to see what is going on that way.

Re: force value for composite fb doesn't work [message #1840062 is a reply to message #1840059]

Tue, 06 April 2021 05:00

Eclipse User

It should be possible to watch values of CFB instances. And I thought also forcing should be possible. Over the weekend I have heavily reworked the code for the Instance viewers. When this code is merged I will also look into the forcing inside of CFBs.

@Barry: I don't think he meant the tester. Unfortunately I'm also way to often debug the C++ code directly. But we are working to make debugging in 4diac IDE better.

Re: force value for composite fb doesn't work [message #1840064 is a reply to message #1840062]

Tue, 06 April 2021 05:42

Eclipse User

I have already debugged the code, it's exactly a bug
EMGMResponse CResource::writeValue(forte::core::TNameIdentifier &paNameList, const CIEC_STRING & paValue, bool paForce){
EMGMResponse retVal = e_NO_SUCH_OBJECT;

CStringDictionary::TStringId portName = paNameList.back();
paNameList.popBack();
forte::core::TNameIdentifier::CIterator runner(paNameList.begin());

CFunctionBlock *fb = this;
if(paNameList.size() >= 1){
//this is not an identifier for the resource interface
fb = getContainedFB(runner); // the last entry is the input name therefore reduce list here by one
}

if((0 != fb) && (runner.isLastEntry())){
CIEC_ANY *var = fb->getVar(&portName, 1);
if(0 != var){
// 0 is not supported in the fromString method
if((paValue.length() > 0) && (paValue.length() == var->fromString(paValue.getValue()))){
//if we cannot parse the full value the value is not valid
if(paForce){
var->setForced(true);
CDataConnection *con = fb->getDOConnection(portName);
if(0 != con){
//if we have got a connection it was a DO mirror the forced value there
CCriticalRegion criticalRegion(m_oResDataConSync);
con->writeData(var);
}
}
retVal = e_RDY;
}
else{
retVal = e_BAD_PARAMS;
}
}
}
return retVal;
}

the highlight part didn't consider the Hierarchical fb in composite (especially composite fb in composite fb)

Re: force value for composite fb doesn't work [message #1840101 is a reply to message #1840064]

Tue, 06 April 2021 16:14

Eclipse User

Thanks for pointing that out. The getFB() method in the monitoring class is doing it correctly. The right solution would be to move that method to the resource and use it everywhere. Can you please file a bug.

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