Dear experts

 This will be the first time I am using open communication over TCP with SEND and REC FCs .

Is there any Instruction and steps for configuring an ISO transport connection  for the bellow application .

Please provide any sample or description how to setup , configure and use of  Function Blocks for establishing ISO-ON-TCP communication between redundant  S7-412-5H  PN/DP with integrated PN port   and one CP-1623 .

* CPU412-5H --PN ---> ISO-ON-TCP

* CPU412-5H--PN ----> ISO-ON-TCP

                                           ISO-ON-TCP <---* CP1623 + HARDNET-IE S7 +

                                                                            REDCONNECT + WINCC V7.3

I got  Configuration instructions for communication between S7400 CP and S7-300 CP

But I could not get it , the picture was not clear for me for the above application  .

Please Help 

Hello sam_david,

ISO-on-TCP communication has been discussed here:

ISO & TCP/IP & ISO_on_TCP/IP transport protocol

Also look at this FAQ:

How do you program the communication blocks FB63 "TSEND", FB64 "TRCV", FB65 "TCON" and FB66 "TDISCON" in order to use the ISO-on-TCP protocol for data exchange via the integrated PROFINET interface of an S7-300/S7-400 CPU or via the CP443-1 Advanced?

and here is an example:

Comparison of Data Transmission via one and via four parallel ISO on TCP Connections on Industrial Ethernet

regards