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Identifying function blocks individually within the code [message #1834018]

Fri, 30 October 2020 06:09

Eclipse User

Hi,
I am using a simple blink example with a redundant application. I wish to send a stream on each individual FB and wished to see if there was a way to identify them through the code. for example, I want to check if the FB is E_SWITCH then perform some task, and then check if the FB is E_SWITCH_1 and then perform something else. Is there a way to do so?

Attachment: snapshot_4diac.png
(Size: 28.00KB, Downloaded 84 times)

[Updated on: Fri, 30 October 2020 07:56] by Moderator

Re: Identifying function blocks individually within the code [message #1834036 is a reply to message #1834018]

Fri, 30 October 2020 10:50

Eclipse User

hi,

can you please expand a bit on what you mean with sending a stream on each individual FB?

Regarding the identification of individual FBs: In 4diac FORTE each FB type is a class and each FB instance will be an instance of this class. In the C++ code you can access the instance name of the FB and us that for identification.

If you would like to get event streams a hook can be the code in the CFunctionblock base class where input events are received and outputevents are sent.

I hope this is in the direction that you asked.

BR,
Alois

Re: Identifying function blocks individually within the code [message #1834038 is a reply to message #1834036]

Fri, 30 October 2020 11:25

Eclipse User

Like in the attached image the E_CYCLE is sending out Events to both E_SWITCH and E_SWITCH_1. since they are sent as multicast, as soon as the ReceiveFromUDP function is called my custom function gets called for both the SWITCHES, What I would like to do is check if it is E_SWITCH then call the custom function and similarly for E_SWITCH_1.

VG,
Shobhit

[Updated on: Fri, 30 October 2020 11:28] by Moderator

Re: Identifying function blocks individually within the code [message #1834042 is a reply to message #1834038]

Fri, 30 October 2020 15:31

Eclipse User

Ah thanks for the clarification. IEC 61499 states that FBs are encapsulated and they will behave the same independent to whom they are connected. Given your setup I think it would make more sense to have a dedicated configuration parameter as part of your receiving layer (I think it is also better to not modify our udp receiving code but have a dedicated layer on top which handles that, I remember Mario de Sousa had a nice paper on that topic). Or if that is not what you want better check on resource or devices. Although I think the first option is better configureable by the user.

Re: Identifying function blocks individually within the code [message #1834444 is a reply to message #1834036]

Tue, 10 November 2020 08:21

Eclipse User

Can you please point in the direction to get the FB names, I have been trying a few things but seemingly cannot fetch the FB names in the BSDSocketinterface.cpp file as intended.

Re: Identifying function blocks individually within the code [message #1834452 is a reply to message #1834444]

Tue, 10 November 2020 09:47

Eclipse User

You should definitly change BSDSocketinterface.cpp for this task. Please create an additional layer. And I still think you should give the information as parameter to your layer and not search for FB instance names in the runtime.

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