Configuring Communication Connections

In both projects, the same connection name must be configured in the properties of the connection. The connection name is used as a textual reference when the projects are merged. Based on the connection name it is possible to assign the connection partner and synchronize the connection properties.

Before the projects are merged, such connections are ”unspecified connections” in terms of addressing; in other words, the partner addresses remain empty.

Unspecified Connections

Connections to an as yet unknown device (for example a diagnostic unit) are configured as “unspecified” connections. They can be specified later in the Properties dialog.

You can create an unspecified connection simply by selecting station “unspecified” for the connection partner when you create the connection. The unspecified connection can be used in two ways (explained below based on the example of an ISO-on-TCP connection (ISO transport and TCP connections are analogous):

SDeclare readiness for communication – passive connection establishment

The connection establishment is then set to passive (see settings in the General tab).

The address setting for the ISO-on-TCP connection is then as follows: The remote IP address is 0.0.0.0 and the remote TSAP is empty; in other words, they are not relevant for the CP. When the connection is established, any partner is accepted (partner = connection name that addresses the CP with the correct IP address and TSAP).

It is also possible to use a partial specification; in other words, communication is permitted with any partner that matches the specified TSAP.

SConnection to a specific station in any project

The address setting for the ISO-on-TCP connection is then as follows:

You can specify the remote IP address and the port of any destination station. The destination station can be in the current STEP 7 project or in another project.

Use this method if you have not created a substitute object for the partner station, for example SIMATIC S5, in the current project.

The following table lists the possible options.

Table 4-2

Meaning for Connection

IP Address /

TSAP / Port

Possible Connection

Establishment

MAC Address

 

Establishment

 

 

 

 

by any partner

empty

empty

passive

 

 

 

 

by any partner via specific TSAP

empty

specified

passive

 

 

 

 

to or by a specific partner

specified

specified

active / passive

 

 

 

 

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Siemens S7 appendix Unspecified Connections, By any partner via specific Tsap Empty, To or by a specific partner

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.