Hi, did anyone tried to use profinet in TIA Portal v13 to communicate between s7-1500 and s7-300 using BSEND and BRCV instructions with s7 connection?

I'm trying to do that, but I haven't had any succes. S7-300 sends some data frome the DB, as input in REQ I have clock memory bit that triggers every second. Reset input is set to false, ID is the local ID of the connection in dec format, R_ID is a number which is the same on BSEND and BRCV instructions. RD_1 is the pointer to the memory area that I need to send.

BRCV instruction the situation is similar. But in online view, using monitor mode I can say that the memory clock bit changes ever second but the outputs DONE and ERROR are always in false. And the RBCV on s7-1500 doesn't receive any information.

Does some know what may be the problem? Are the BSEND AND BRCV compatible between s7-300 and s7-1500?

Hi,

do you know the manual

CPU-CPU communication with Simatic Controllers? Please look at page 98. Here you can find the communication blocks which are possible for coummunicating:

https://support.industry.siemens.com/cs/ww/en/view/78028908

BSEND/BRCV is listeted and possible...

Regards,

Towome

hi dolby,

maybe this FAQ can help you:

How do you program communication blocks FB12 "BSEND" and FB13 "BRCV" for data exchange in the S7 program of an S7-300 CPU?

I know that this FAQ is written for Step7 5.5. But maybe it can help you anyway.

regards,

Thanks for reply, I've already seen those manuals, cpu to cpu communication manual is where I saw that this should be possible. But somehow still can't make it work. I will keep trying, if someone has any idea just let me know.