Hello,

I want to connect several (eg. two) ethernet devices to the PLC (CPU - 314C-2 PN/DP).

I wrote some program, but when one connection is established the second coudn't be established and i can't receive date from two devices at the same time. The problems doesn't appear when one device established connection (no matter which). 

I send me S7 project.

In OB1, I call FB1 and FB2 (which are identical, previously there was one FB1 and I call it twice).

FB1 and FB2 have instance DB1 and DB2. In DB67 I have a 4 structure with connection parameter

for 4 devices ( LPR-DHP = Long Range, Highly-Precise Distance Measurements).

LPR_0 ==> number_device = 0, connection_id = 1   IP:10.1.1.151

LPR_0 ==> number_device = 1, connection_id = 2   IP: 10.1.1.152

LPR_0 ==> number_device = 2, connection_id = 3

LPR_0 ==> number_device = 3, connection_id = 4

In FB1 (and FB2) I calculate the connection_id (based on number_device) and with structure with connection parameter i should use.

I would like to have one FB1 (but it didnt work) so i create FB2 but it doesn't work to. 

Source of information:

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

To established connection i use M1.0 and M1.1 in variable table "Diag".

hi,

I had a look to your projekt. 

How did you assign the parameters in DB67(TCON-Parameter UDT65)?

regards,

Hi

I set the parameters of communication in OB100 (Complete Restart).

I have there 4 networks (for each communication, structures).

For now, i use only two of them (i use two devices).

And i send communication parameter to FB65 by pointer DB_TCON_Parameter (64 byte length).

I think i answered your question.

Maybe i describe the situation.

1. I set M1.0 and the connection with device0 is established. I receive the data.

     The CONNECT.DONE bit flashes for one cycle. And status changed from 7000 to 7002 for one cycle.

2. I reset M1.0 to disconnected the communication with device0.

3. I set M1.1 and the connection with device1 is established. I receive the data.

     The CONNECT.DONE bit flashes for one cycle. And status changed from 7000 to 7002 for one cycle.

3. I reset M1.1 to disconnected the communication with device1.

Next:

1. I set M1.0 and the connection with device0 is established. I receive the data.

      The CONNECT.DONE bit flashes for one cycle. And status changed from 7000 to 7002 for one cycle.

2. I set M1.1 and the connection with device1 isn't established.

      The CONNECT.DONE bit DON'T flashes for one cycle. And status is still 7000. CONNECT.ERROR = 0.

3. I reset M1.0 and M1.1.

Next:

1. I set M1.1 and the connection with device1 is established. I receive the data.

     The CONNECT.DONE bit flashes for one cycle. And status changed from 7000 to 7002 for one cycle.

2. I set M1.0 and the connection with device0 isn't established.

      The CONNECT.DONE bit DON'T flashes for one cycle. And status is still 7000. CONNECT.ERROR = 0.

3. I reset M1.0 and M1.1.

Hello,

just an idea:

The T-blocks are triggered with a positive edge on REQ parameter. Are you sure, you have such one?

Are M1.0/ M1.1 false in one or more cycles?

Do you try, that also the T blocks are run with REQ:=0 one or more cycles to delete internal memory data?

hi,

have a try to use only the connect-block in your FB1/FB2. 

till now i didn´t find anything wrong in your programm.

regards

I add this code after CONNECT calling

      A     #CONNECT.ERROR
      JCN   err1
      L     #CONNECT.STATUS
      T     MW     8
err1: NOP   0

and there is a error but it appear only for one cycle i think.

STATUS WHEN ERROR = w#16#80A1

Kaulquappe

Hello Iperius,
you can use a local port number only once! So you need to use different ones.

Regards,

Kaulquappe

OMG, there must be something wrong with my eyes....