The S7-400 is the most powerful PLC in the family of SIMATIC controllers. It enables successful automation solutions with Totally Integrated Automation (TIA). The S7-400 is an automation platform for system solutions that focuses on process engineering and is characterized primarily by its modularity and performance reserves.
The power PLC for the mid to high-end performance ranges
The solution for even the most demanding tasks
With a comprehensive range of modules and performance-graded CPUs for optimal adaptation to the automation task
Flexible in use through simple implementation of distributed structures
Optimal communication and networking options
User-friendly handling and uncomplicated design without a fan
Can be expanded without problems when the tasks increase
Simultaneous operation of several CPUs in one S7-400 central device.
Multicomputing distributes the overall performance of an S7-400. For example, complex tasks in technologies such as open-loop control, computing or communication can be split and assigned to different CPUs. And every CPU can be assigned its own local I/O.
The powerful backplane bus of the S7-400 and the communication interfaces that can be connected direct to the CPU enable high-performance operation of a host of communication lines. This permits, for example, the division into one communications line for HMI and programming tasks, one line for high-performance and equidistant motion control components, and one "normal" I/O fieldbus. Additionally required connections to MES/ERP systems or the Internet can also be implemented.
Engineering and diagnostics:
The S7-400 is configured and programmed extremely efficiently together with the SIMATIC Engineering Tools particularly in the case of extensive automation solutions with a high engineering component. For this purpose, high-level languages such as SCL and graphical engineering tools for sequential control systems, state graphs and technology-oriented diagrams are available, for example.
Conformal coating (G3) as standard for increased resistance to environmental influences
High-availability automation system with redundant design
For applications with high fail-safety requirements:
Processes with high restart costs, expensive downtimes, little supervision, and few maintenance options.
Redundantly designed central functions
Increases availability of I/O: switched I/O configuration
Also possible to use I/Os with standard availability: single-sided configuration
Can be used with versatile, scalable SIMATIC ET 200SP HA I/O system via STEP 7
Hot standby: Automatic reaction-free failover to the standby unit in the event of a fault
Configuration with 2 separate or one divided central device
Connection of switched I/O via redundant PROFIBUS DP or system-redundant PROFINET I/O
Fail-safe automation system for plants with increased safety requirements
Complies with safety requirements to SIL 3 in accordance with IEC 61508, AK6 in accordance with DIN V 19250 and Cat. 4 in accordance with EN 954-1
If required, also fault tolerant through redundant design
Without additional wiring of the safety-oriented I/O
Safety-related communication via PROFIBUS DP with PROFIsafe profile
Based on S7-400H and distributed ET 200 I/O with fail-safe modules
Standard modules for non-safety-oriented applications can also be used in the automation system
Isolation module for the combined use of fail-safe and standard modules in safety mode in one ET 200M
The SIMATIC S7-400 is the power PLC for the mid to high-end performance ranges.
The modular and fan-free design, high level of expandability, extensive communication and networking options, simple implementation of distributed structures, and user-friendly handling make the SIMATIC S7-400 the ideal solution even for the most demanding tasks in the mid to high-end performance ranges.
Application areas of the SIMATIC S7-400 include:
Automotive industry, e.g. assembly lines
Mechanical equipment manufacture, including special mechanical equipment manufacture
Building management systems
Power generation and distribution
Paper and printing industry
Food and beverages industry
Process engineering, e.g. water and wastewater utilities
Chemicals industry and petrochemicals
Instrumentation and control
Several performance-graded CPU classes and a comprehensive range of modules with a host of user-friendly functions allow users to perform their automation tasks individually.
In the case of task expansions, the controller can be expanded at any time without significant cost by means of additional modules.
The SIMATIC S7-400 is universal in use:
Maximum suitability for industry thanks to high electromagnetic compatibility and high resistance to shock and vibration.
Modules can be connected and disconnected while power switched on.
In many areas of automation technology, demands are increasing all the time with regard to the availability and thus the fail-safety of the automation systems. There are areas where a plant standstill can result in extremely high costs. Here, only redundant systems can do justice to the availability requirements.
The fault-tolerant SIMATIC S7-400H meets these requirements. It continues to operate even when parts of the controller have failed due to one or more faults. The availability achieved in this way makes the SIMATIC S7-400H especially suitable for the following application areas:
Processes with high restart costs after a controller failure (generally in the process industry).
Processes with expensive standstill times
Processes involving valuable materials, e.g. in the pharmaceuticals industry.
Applications with reduced maintenance personnel
The ordering data of the components for the S7-400H can be found with the relevant modules under "S7-400/S7-400H/S7-400F/FH".
The SIMATIC S7-400F/FH fail-safe automation system is used in plants with increased safety requirements. It controls processes where immediate shutdown presents no danger to personnel or the environment. The S7-400F/FH has two basic designs:
Fail-safe automation system. In the event of faults in the control system, the production process is brought to a safe state and interrupted.
Fail-safe and high-availability automation system. In the event of a fault in the control system, redundant control sections intervene and continue control of the production process.
The additional use of standard modules makes it possible to establish a fully integrated control system for a plant where non-safety related tasks and safety-related tasks co-exist. The overall plant is configured and programmed with the same standard tools.