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Configuration notes: The industrial Ethernet CPs in the 300 series differ in their hardware interfaces and communication functions, including the number of frames. The following table shows the differences: Communication Processor CP343-1 CP343-1 CP343-1 IT CP343-1 PN CP343-1 Lean MLFB 6GK7 343-1EX11-0XE0 6GK7 343-1EX21-0XE0 6KG7 343-1GX21-0XE0 6GK7 343-1HX00-0XE0 6GK7 343-1CX00-0XE0 Connection ITP, RJ45, AUI RJ45 RJ45 ITP, RJ45, AUI RJ45 Application ISO transmission protocol X X1) X2) - - ISO-over-TCP transmission protocol X X X X X TCP/IP transmission protocol X X X X X UDP transmission protocol X X X X X S7 communication X X X X X5) IT communication - - - - - PG/OP communication X X X X X PROFINET communication - X X X 4) - S7 routing X X X X X Number of frames S5-compatible communication3) 16 16 16 16 16 User data volume (TCP) 8 Kbytes 8 Kbytes 8 Kbytes 8 Kbytes 8 Kbytes User data volume (UDP) 2 Kbytes 2 Kbytes 2 Kbytes 2 Kbytes 2 Kbytes Number of S7 communications 16 16 16 16 4 Number of PG/OP communications (non-cyclic usage) 16 16 16 16 4 Total number of multi-protocol connections (all connections operating simultaneously) 48 48 48 32 12 Multicast 16 16 16 16 8 1) The earlier CP343-1EX20 modules do not support either the ISO protocol or PROFINET. 2) The earlier CP343-1GX20 modules do not support either the ISO protocol or PROFINET. 3) Total number of TCP/UDP connections operating simultaneously. 4) Only PROFINET CBA version V1.0 (non-real-time) is supported. 5) Only server functions are supported. Description of the difference criteria: ISO transmission protocol: ISO transmission connections are used for data exchange between S5 stations and S7 stations or PC stations (S5-compatible communication). Attributes of the ISO transport connection: Communication between stations is based on MAC addresses. Data transmission using data blocks is suitable for large amounts of data. Data transmission can be achieved using the “SEND/RECEIVE” and “FETCH/WRITE” applications. On PCs, the ISO transfer service is provided through C functions or by using an OPC server. The reception of data is confirmed by the other party through acknowledgment at Layer 4 of the ISO reference model. Data cannot be transmitted through a router (protocols without routing capabilities). The ISO-on-TCP transmission protocol: The ISO-on-TCP transmission connection is used for data exchange between S5 stations and S7 stations or PC stations (for S5-compatible communication). Attributes of ISO-over-TCP connection: Communication between stations is based on IP addresses. The FRC 1006 extension that complies with the TCP/IP standard is consistent with Layer 4 of the ISO reference model. Data transmission is achieved using the “SEND/RECEIVE” and “FETCH/WRITE” applications. On PCs, the ISO transfer service is provided through C functions or by using an OPC server. The reception of data is confirmed by the other party through acknowledgment at Layer 4 of the ISO reference model. Data can be transmitted through routers (protocols with routing capabilities). TCP/IP transmission protocol: Enables data exchange between stations (including third-party stations) through the configuration of TCP connections. Attributes of TCP connection: Complies with the TCP/IP standard. Data transmission can be achieved using the “SEND/RECEIVE” and “FETCH/WRITE” applications. The TCP/IP implementations already available in operating systems can usually be used on PCs. Data can be transmitted through routers (protocols with routing capabilities). UDP Transmission Protocol: Enables data exchange between two stations through the configuration of UDP connections. Attributes of UDP connections: The UDP protocol enables unreliable transmission of data packets between two stations. It supports multicast transmission; by establishing a multicast transmission loop, multicast transmission allows groups of stations to receive information together and send information to this group. Data transmission is carried out through the “SEND/RECEIVE” service. Data can be transmitted through routers (protocols with routing capabilities). S7 communication: Data exchange between S7 stations and PC stations is achieved through S7-connected configurations. Attributes of S7 connection: This connection can be used with all S7/M7 devices. It can be used for all subnets (MPI, PROFIBUS, Industrial Ethernet). Reliable data transmission between SIMATIC S7/M7-300/400 stations (using “BSEND/BRCV” or “PUT/GET” SFBs). High-speed, unreliable data transmission depends on the time-related operations of the other party (using the “USEND/URECV” SFBs). Confirm the transmission of data from the other party at layer 7 of the ISO reference process. IT Communication: E-mail function: Activates alarms at the S7 station and sends their text via email. Emails may contain variable values and attachments. HTML features: A web server is built into the CP template. Otherwise, applets or Java beans can also be used to provide and view HTML pages with S7 variables. Applications written in JAVA can access S7 variables using the HTTP protocol via Java beans. FTP functions (as server and client): The FTP client function can be used to save data (only from data blocks) as files on an FTP server, or to retrieve data from an FTP server (only from blocks with a special header of 20 bytes). The FTP server function is used to transfer files (HTML pages, image files, ...) to the CP’s file system. Values can also be read directly from the data block, or written into the data block directly through a file. PG/OP communication: Programming and configuring S7 stations using STEP 7 over Ethernet. The programming device is connected to Ethernet. PROFINET communication: PROFINET is a standard used by the PROFIBUS User Organization (PNO); it defines cross-vendor communication and engineering models. It is used in component-based automation (CBA) environments