S71200 Tcp Communication.

Hi to all,

I am using s71200 plc...

I am sending some spec values from my plc to the module1 continuously through TCP communication.... Now in that same program i have to send a frame to a module2(both module1&2 are third party devices) which has to be send continuously without disconnecting the transmission..

Now the issue i am facing is, i was able to communicate with either one of the module , to communicate with other i have to disconnect one communication..

But my application is to send data concurrently to both the module1 and module2 which are having different ip add & port address... First of all without disconnecting the communication, the data transmission between 2 slaves and one master concurrently is possible or not????


Pls guide me

Regards,

Nelliyan

The issue is how many "sockets" the CPU1200 can open concurrently.

"S7-1200 System Manual" does not explicitly say anything about the number of concurrent sockets. However, from the way TCON/TDISCON, TSEND/TRCV are used, I think the system can handle only one socket at a time.

Are you polling two Modbus/TCP slaves?

Rahul
http://www.voltsmith.com

i am using 2 tcp slaves

I cant use modbus because one of the module does not support... module one is micro controller based device....


Can u tell me how to disconnect a communication socket using the T discon... I tried to check it manualy but no response in the DONE, ERROR, Busy status of that disconnect block...