Hello Guys...,

I wish to get your help in the upcoming points 

*- i have two Flow computers with Modbus TCP/IP protocol i have S7 300,  CPU 315 with a CP 343-1 lean

*- I have configured the first Flow computer with Siemens PLC Successfully and i received right data, "PLC is a client, Flow computer is a Server" 

***- the issue is how to configure the second Flow Computer with the same station 

i used FB106, FB107, FB108, Instance data Block DB108, DB for License , DB for the CONTROL DAT, and DB101 for reading data from flow computer 1

****- I tried to Create The second Configuration By Creating another Instance DB 109 for the same FB108, as well NEW  Control DAT2 , and new DB102  for reading data from the Flow Computer 2 , but it gives me error after starting communication 

So please help 

Thank you..,

Hello,

in my opinion, basically this kind of communication (your case) can have independed 2 connections, each for each PC with different IP. Then you can have independed 2 communication via one port of CP on same time. On other side you can have connection to one Server, collect data and disconnect. Then connect to second Server via other instance DB (probably defined with other IP,...) also with other RCV buffer and repeat same procedure. Your thoughts?

Wüstenräuber, Duris_I  Thank you for your concern :)

I have already created a separate connection for each Flow computer with the CPU 

Each flow computer take a unique IP as well the CPU and the ports are used for each Flow computer are the same because they are two devices I used port no. 501 but the ports for the CPU are different Port 2000 for the first connection and Port 2001 for the second one , I use the ID of each connection on the call of FB108 " I called FB108 twice one for the instance DB 108 and the second for Instance DB 109 " at OB100 and OB35

what is strange for me the error that happened

I start the first connection first,  it works fine with no error and once I start the second connection I found the error counter for the first connection start counting as well it count right data communication at t the same time but the rate of counting data exchange is much higher than the error counting

The second connection only count errors it gives me different error codes some times only numbers appears I can not remember well now but I think 188... and some times A008

waiting your help
best regards

Hi,

can you send me a backup of your project?, I have the same problem.

This is my email: --Deleted E-Mail--

Regards