S7-300 CPU 31xC 和 CPU 31x

                                                                                            ① Status and error indicators

                                                                                            ② Slot of SIMATIC MMC card (including eject device)

                                                                                            ③ Integrated input and output terminals

                                                                                            ④ Power connection

                                                                                            ⑤ 2. Interface X2 (DP)

                                                                                            ⑥ 1. Interface X1 (MPI)

                                                                                            ⑦ Mode selector

A block of data for parameterization

A block of data for parameterizing TCP and ISO-on-TCP connections

To use TCP and ISO-on-TCP configuration connections, you need to create a number that contains UDT 65 "TCON_PAR" medians

According to the structure of DB. This data structure contains all the parameters needed to establish the connection. Each connection requires such a number

According to the structure, you can arrange it in the global data store.

The CONNECT parameter of FB 65 "TCON" contains a reference to the address of the corresponding connection description (e.g.,

P#DB100.DBX0.0 Byte 64).

A block of data used to parameterize local communication access points using UDP

To assign parameters to the local communication access point, create one that contains the UDT 65 "TCON_PAR" data structure

DB. This data structure contains the parameters needed to establish a connection between the user program and the communication layer of the operating system

The CONNECT parameter of FB 65 "TCON" contains a reference to the address of the corresponding connection description (e.g.,

P#DB100.DBX0.0 Byte 64).

Instructions

Setting Connection Instructions (UDT 65)

You need to enter the communication interface in the "local_device_id" parameter of UDT65 "TCON_PAR" (for example

B#16#03: Communication via IE interface integrated with CPU 319-3 PN/DP).

Establish communication connection

● Suitable for TCP and ISO-on-TCP

Both communication partners call FB 65 "TCON" to establish a connection. Define which communication partner is used as master during parameterization

Dynamic communication endpoints and which are used as passive communication endpoints. To determine the number of possible connections, see your CPU's technology

The technical specifications.

The CPU automatically monitors and maintains active connections.

If the connection is interrupted, for example due to an open circuit or a telecommunication partner, the active party will attempt to re-establish the connection

Answer. You don't have to call FB 65 "TCON" again.

The active connection is terminated by calling FB 66 "TDISCON" or when the CPU is in STOP mode. Want to re-

To establish a connection, you must call FB 65 "TCON" again.

● Suitable for UDP

Both communication partners call FB 65 "TCON" to set up their local communication access point. This will be in the user program and operation

Connections are established between the communication layers of the system. Connections to remote partners are not established.

The local access point is used to send and receive UDP packets.

Distinguish between PROFINET IO and PROFINET CBA features