Configuring Communication Connections

Amounts of Data

Refer to the manual /1/ supplied with the Ethernet CP for the number of communication connections supported by the Ethernet CP. The number of connections per station can be increased by adding more CPs.

The Ethernet CP can transfer the amounts of data shown in the table below per job on one connection:

Table 4-1

 

ISO Transport

ISO-on-TCP

TCP

UDP

 

 

 

 

 

Sending

8192 bytes

8192 bytes

8192 bytes

2048 bytes

 

 

 

 

 

Receiving

8192 bytes

8192 bytes

8192 bytes

2048 bytes

 

 

 

 

 

Notice

The transfer of more than 240 bytes of data is supported by newer version CPs. Please note the information in Section 5 and in the manual of the Ethernet CP.

Tasks of the Ethernet CP

When handling the data transfer on a connection, the Ethernet CP has the following tasks:

SWhen receiving

Receiving data from Ethernet and transferring it to the user data area on the CPU.

SWhen sending

Taking data from the user data area on the CPU and sending the data via Ethernet.

For a free UDP connection, the following functions are also necessary in addition to those above:

SWhen receiving

Entry of the sender of the message in the job header.

SWhen sending

Evaluation of the job header and addressing the partner

The connection is established automatically as soon as the partner is obtainable.

88

SIMATIC NET NCM S7 for Industrial Ethernet

C79000-G8976-C129–06

Page 88
Image 88
Siemens S7 appendix Amounts of Data, Tasks of the Ethernet CP

S7 specifications

The Siemens S7 series represents a cornerstone in the realm of programmable logic controllers (PLCs), developed by Siemens, a leading company in industrial automation. Widely used across various industries, the S7 series offers robust solutions for controlling machinery and processes, thanks to its reliable performance, flexibility, and scalable architecture.

One of the key features of Siemens S7 PLCs is the modularity of their design. Each system can be configured to meet specific application requirements due to the ability to mix various input/output modules, CPUs, and communication processors. This modular approach allows for the customization of systems to suit diverse automation tasks, providing end users with the adaptability required for modern manufacturing environments.

The S7 series encompasses several models, including the S7-1200, S7-300, and S7-1500. The S7-1200 is particularly suited for small to medium-sized applications, offering a compact design and integrated communication interfaces. In contrast, the S7-300 is designed for more extensive and complex control systems, making it ideal for large-scale industrial applications. The S7-1500 stands out with its advanced performance metrics, rich feature set, and high-speed processing capabilities, making it perfect for demanding applications that require real-time control and extensive data handling.

Siemens also emphasizes the importance of communication technologies within the S7 series. With options such as PROFINET, PROFIBUS, and EtherNet/IP, the S7 PLCs can seamlessly integrate into existing automation infrastructures, ensuring smooth data exchange between devices. The incorporation of web-based technologies and cloud connectivity further enables remote monitoring and control of systems, enhancing operational efficiency.

Another notable characteristic of Siemens S7 PLCs is the use of TIA Portal (Totally Integrated Automation Portal), an innovative software platform that simplifies the engineering process. TIA Portal allows users to program, configure, and diagnose their automation devices in a single environment, reducing setup times and improving productivity.

In conclusion, the Siemens S7 series stands out due to its modular design, range of models suitable for various applications, advanced communication technologies, and user-friendly programming software. This combination of features and characteristics makes S7 PLCs a preferred choice for industries seeking reliable and efficient automation solutions. As industrial demands continue to evolve, Siemens S7 PLCs remain at the forefront, adapting to technological advancements and setting benchmarks in the automation field.