Hi,

I am testing TCP/IP communication by example sample_open_tcp.zip on the page https://support.industry.siemens.com/cs/document/29737950/how-do-you-program-the-communication-blocks-fb63-tsend-fb64-trcv-fb65-tcon-and-fb66-tdiscon-in-order-to-use-the-tcp-protocol-for-data-exchange-by-means-of-the-integrated-profinet-interface-of-an-s7-300-s7-400-cpu?dti=0&lc=en-WW

I have had testing the program with  2 simulator

It looks like OK for connection

But it was not work to transmmite and recieve

I don't know why

Here is testing movie https://www.youtube.com/watch?v=YCDy64vHFGk

What is wrong?

Please, Let me know

Thanks,  advance

Lee

hi,

the SEND_REQ is always true. The parameter needs a positive edge to send. 

regards,

Hello,

I am not sure (in your video, I could not see it), if your simulate a positive edge on REQ at TSEND?

TSEND starts sending only with an 0 -> 1 on REQ.

Pittiplatsch

OK...I was too late for my answer

 ..hehe

I didn´t see it too if the send_req is switching. In the FAQ it normally is connected with M100.6 which is a clock marker. I saw in video that the M100.6 changed, I think 1Hz. But the Input just stays true.

Ok, thanks

I will try..  now

Hi,  mopS04     Pittiplatsch

I did it

I couln't

It is not work

Here is testing movie https://www.youtube.com/watch?v=HEqgl2IVcI0

Please, help!!

Do you get any STATUS/ Error in TSEND?

Note: The value on parameter STATUS is only valid one cycle.

So please insert network with (just as an example)

U ERROR

L STATUS

T MW40

I did to do that

There is no error

SendStatus --- 16#1002

ReceiveStatus -- 16#0002

RCV_NDR --- 1

What's mean?

I am looking for your answer....

This status values do not really exist..only 16#7000 or 16#7002.

NDR=1 means: New Data receive.

In TCON Param, what do you insert in Byte 4 ("connection_type"). B#16#11?

I know, with CPU S7-300 <V3, you need B#16#1. So, I do not know, what PLCsim "simulates", so can you try to change this parameter?