ATSE – Modbus Communication Protocol. EN. Grundlagen der Niederspannungsschalttechnik (Fundamentals of Low-Voltage Switchgear and Controlgear). Grundlagen Der Niederspannungs Schalttechnik · Motors D Chap00 German · ASME BPE BioProcessEquipDesign · stromerzeuger und. Grundlagen Der Niederspannungs Schalttechnik. uploaded by. uploader avatar Posch Peterin · BA_BK_G1p6_25_DE. uploaded by. uploader avatar MariaKnez.

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These notices are highlighted in the manual by a warning triangle and are marked as follows according to the level of danger. Danger indicates that death, severe personal injury or substantial property damage will result miederspannungs-schalttechnik proper precautions are not taken. Warning indicates that death, severe personal injury or substantial property damage can result if proper precautions are not taken.

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Niedsrspannungs-schalttechnik indicates that minor personal injury or property damage can result if proper precautions are not taken. Attention draws your attention to particularly important information on the product, handling the product, or to a particular part of the documentation. Qualified personnel Only qualified personnel should be allowed to install and work on this equipment. Niedeespannungs-schalttechnik persons are defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and systems in accordance with established safety practices and standards.

Correct usage Note the following: Warning This device and its components may only be used for the applications described in the catalogue or the technical descriptions, and only in connection with devices or components from other manufacturers which have been approved or recommended by Siemens. This product can only function correctly and safely if it is transported, stored, set up, and installed correctly, and operated and maintained as recommended.

Some other designations used in these documents are also brands; the owner’s rights may be violated if they are used by third parties for their own purposes. Copyright Siemens AG All rights reserved The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages.

All rights, including rights created by patent grant or registration of a utility model or design, are reserved. Disclaimer of liability We have checked this manual to ensure that its contents are correct and applicable in relation to the hardware and software it describes. Despite all our endeavors, however, discrepancies cannot be wholly excluded and so we cannot guarantee complete correctness and applicability.

However, the data in this manual are reviewed regularly and any necessary corrections included in subsequent editions.

Suggestions for improvement are welcomed. Content of the Manual Chapter 1 contains niederpannungs-schalttechnik short introduction to communication in power distribution systems, and provides an overview of the benefits and applications of communicationscapable circuit-breakers. The chapter concludes with a short description of the most important bus systems. It includes information on the ordering and configuration data, and provides commissioning instructions.

These procedures are carried out using the breaker data adapter BDAa state-of-the-art Internetcapable parameterization device for circuit-breakers, which is described in Chapter 6. This describes all the available data points status, measured values, parameters, and so onincluding formats and scaling factors. Chapter 7 contains an easy-to-understand description of the data dictionary.

Chapter 8 concludes this manual with a description of the typical applications for communicationscapable circuit-breakers. Introduction The demands regarding communications-capable systems, data transparency, and flexibility in industrial automation systems are growing all the time.

Bus systems and intelligent switchgear are vital to ensure that industrial switchgear systems can meet these demands, since industrial production and building management are now inconceivable without communication technology. The ever-more stringent requirements regarding the electrical and mechanical aspects of circuit-breakers, the growing need for flexibility and efficiency, and increasing process rationalization and automation have contributed to the recent major innovations in circuit-breaker technology.

The wide range of applications ensure that these circuit-breakers are more than just simple switching and protection devices. End-to-end communication, as well as data entry, transmission, analysis, and visualization are only possible if the automation and low-voltage switchgear technology components can be easily integrated in a communication solution to leverage the full range of functions available. Prompt analysis of this data enables targeted grunlagen in the process and prevents system failures.


A new generation of circuit-breakers – from 16A to A – with a modular design to support every conceivable application in power distribution systems – cost effective and flexible, its communication functionality enables it to be integrated in cross-application system solutions. Cost Saving Information for preventative maintenance e. Communication helps provide rapid and targeted information on the location and cause of power failures.

The precise cause of the fault can be determined by niederspannungs-schalttechhnik the phase currents e. This information can be used to quickly rectify the fault and potentially save a considerable amount of money.

Entering power rating values, work, and the power factor cos offers even more scope. The transparency of the power consumption data for business analysis enables power profiles to be created and costs to be gtundlagen assigned.

In this way, power costs can be optimized by balancing the peak loads and troughs. Advantages include simple retrofitting and a compact design benefiting everyone who uses SENTRON, whether in planning, business, or whether they develop or operate switchgear systems. With their different structures and mechanisms, certain bus systems are designed for highly specific applications, while others are better suited for more open applications.

The following grundlwgen describes the most important bus systems used in automation and power distribution systems. As at Juneover 1, manufacturers were offering more than 1, products, and user organizations in 23 countries providing support for users of over 4 million PROFIBUS installations.

The device can also be easily integrated in and connected to standard automation systems, since all the major manufacturers of programmable control systems offer PROFIBUS-DP master modules, and the high transmission rates of up to 12 MBaud ensure virtually real-time system operation.

Each station completes its communication task within a defined time frame. In addition, straightforward, cyclic data exchange is carried out for communication between a master and the simple peripheral devices slaves assigned to it. The PROFIBUS-DP achieves this using a hybrid bus access control mechanism comprising a central token passing procedure between the active stations masters and a central master-slave procedure for exchanging data between the active and passive stations.

Bus access control enables the following system configurations to be implemented: The 3 master devices form a logical ring. Niederspnanungs-schalttechnik MAC bus access control monitors the token. It creates the token in the ramp-up phase and monitors whether just one token is really circulating in the ring.

A class 1 master is mainly used niederdpannungs-schalttechnik automation tasks. In addition to cyclic data exchange, a class 1 master can also establish an acyclic communication connection to its slaves, which enables it to use the extended slave functionality.

A class 2 master is particularly suitable for commissioning, diagnosis, and visualization tasks. Acyclic data transmission is carried out via DPV1. This enables the slave to be reparameterized during operation, for example, and niederspannungs-schalttfchnik data transmission to be carried out.

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DPV1 also allows data to be read directly from the slave by a class 2 master, even though this is still logically connected to a class 1 master. Acyclic data transmission can be used, for example, when operator control and monitoring systems, such as WinCC, or configuration software, such as Switch ES Power see Chapter 5are implemented. Cyclic data exchange between the circuit-breaker and the PLC, however, continues as normal. The appropriate data rates are selected as required here because complete compatibility enables the technology to be implemented on a step-by-step basis.

Siemens has supplied well overconnections all over the world in frequently harsh industrial environments with high EMC requirements. In addition, Internet technology opens up considerable scope for worldwide networking.

The enormous potential offered by intranets, extranets, and the Internet, which are already available in offices of all kinds, can also be implemented in production and process automation environments.


A sender can only send on the bus if no other station is sending at that point. This is made possible due to the fact that the stations are always “listening in” to find out whether any messages are being sent to them or any senders are currently active. If a sender has started sending, it checks that the message it has sent is not corrupt.

If the message is not changed, the send operation continues. In this case, both senders abort their respective send operations. After a random time has elapsed, the sender restarts the send operation. This largely depends on the bus load, which means that real-time applications cannot yet be implemented with Ethernet. Possible Ethernet communication processors for S7 include: This bus system is based on VLSI circuits, which control communication between up to 32, network nodes.

The nodes are arranged in subnetworks, each with a maximum of 64 stations. Routers, which are also based on these circuits neuron chipsare responsible for connecting the subnetworks. Depending on the data rates, a wide range of transmission media can be used, including current leads, radio and infrared channels, coaxial cables, and optical fibers.

The LON bus is a highly distributed bus system in niederspannumgs-schalttechnik each field device features integrated on-site intelligence. LONs are mainly used for building system automation and are often implemented in the production industry. One disadvantage of gateways, however, is that there is always an additional time delay in the system when data is passed from one bus system to niederspannungs-schalgtechnik. This is because the data must be buffered on one side, converted, and then output on the other side.

Modbus Modbus is an open, serial communications protocol based on a master-slave architecture. Since it is very easy to implement on any kind of serial interface, it can be used in a wide range of applications. Modbus comprises a master and trundlagen slaves, whereby communication niederspannungs-schalttcehnik controlled exclusively by the master. Modbus features two basic communication mechanisms: The master sends an inquiry to a station and waits for a response. The master sends a command to all the network stations, which execute the command without confirmation.

Due to the low transmission rate of max kbaud, Modbus is particularly recommended for applications with a low number of grundllagen or low time requirements. This solution is not, however, recommended due to the excessive amount of time and effort involved. The individual circuit-breakers and their modules are described in the following chapters.

Many users now require a complete overview of the plant from a central control room and round-the-clock access to all available information. Modern power distribution systems are characterized by the methods used to network circuit-breakers – both with each other and other components.

In niederspannungs-schlattechnik future, it will be possible to carry out diagnosis and maintenance procedures remotely on the Internet. Operating staff will be given immediate information on system malfunctions or alarm signals. This is not just a vision of the future, but reality.

The devices are available with different switching capacity classes, thereby enabling short-circuit currents of up to ka to be interrupted reliably. They can be adapted to any system conditions, which means that, if required, a rated current module can be used to adapt each circuit-breaker to the appropriate rated current, for example.

The modules can be replaced within seconds without the niderspannungs-schalttechnik for the transformer to be changed. A switchover between two different parameter sets is also possible. This function is particularly useful in the event of a power failure when an grundlagne switchover is made from on-line to generator operation, a process which can also involve all the release conditions changing. A wide range of locking systems are available to improve reliability during critical processes.