Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

is it possible to use on the same connection multiple TSEND (FB63) and TRCV (FB64)

Created by: autom25 at: 7/30/2009 4:46 PM (2 Replies)

Rating (0)

Thanks 2

3 Entries

7/30/2009 4:46 PM	Rate (0)
autom25 Member Joined: 7/29/2009 Last visit: 4/19/2021 Posts: 4 Rating: (0)	Thank you for your help, thanks to you I make the connection between API. I have another question, is it possible to use on the same connection multiple TSEND (FB63) and TRCV (FB64)
	Last edited by: O_Moderator at: 7/31/2009 8:46 AM new subject atfer splitting
Suggestion To thank Quote Answer

7/31/2009 2:32 PM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 1/23/2025 Posts: 3032 Rating: (1059)	autom25 I have another question, is it possible to use on the same connection multiple TSEND (FB63) and TRCV (FB64) Hello again autom25 While I've never tried to do so, my (best guess) answer is that it will (have to) be possible. The but (and this is a big BUT) is though, thatyou will have to essentially write logic that "multiplexes" the various TSEND calls and ensures that they are mutually exclusive (i.e. only one TSEND active at any given time). Bear in mind too that TSEND operates"asynchronically" (a fancy word meaning that it will/may need a number of OB1 scan's/calls to finish what it has to do). Even if you have only one TSENDyou willneed to evalute its DONE bit before you triggerit's next call. Should your requirements be to send different dataareas (e.g. different DB's) to the comms partner and you must do so via the same connection, you may find it easier to have only one TSEND but change the Send DATA area when one call finished and before you call it again (i.e you multiplex the DATA rather than various TSEND calls). IMHO, simultaneous calls of multiple TSEND's on the same (TCON established) connection willNOT work. Having said that, if someone else out there has a different experience (or can confirm my assertion), please let us know.
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
Suggestion To thank Quote Answer
This contribution was helpful to 2 thankful Users J_Bell AutoGen_3850759

8/2/2009 9:05 PM	Rate (0)
jklm Platinum Member Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating: (309)	Hello, Even if you find a way to multiplex the TSEND in asuitable way, the next problem would be to recognize at the receiver which packet is corresponding to which TSEND call. I am afraid that this will not be so easy because the Ethernet port does not deliver any usable information to thePLC appliaction to recognizeone TSEND call among other calls. It will at least necessary to insert a kind of ID and sequence number in each package. Just too complex in my eyes.
	Best regards jklm Suggestion was helpful? Feel free to rate it.
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on