SIMATIC S7-400: The Power Controller for system solutions in the manufacturing and process industries

Within the Controller family, the SIMATIC S7-400 is designed for system solutions in the manufacturing and process automation.

Typical applications:
• Automotive industry
• Standard mechanical equipment manufacture, including
custom mechanical equipment manufacture
• Warehousing systems
• Building engineering
• Steel industry
• Power generation and distribution
• Paper and printing industries
• Woodworking
• Textile manufacture
• Pharmaceuticals
• Food, beverages and tobacco industries
• Process engineering, e.g. water and wastewater utilities
• Chemical industry and petrochemicals 

New for SIMATIC S7-400
The SIMATIC S7-400 is subject to a continuous development
process – especially in the area of CPUs.
In firmware version V6, the CPUs are capable of processing all
the new PROFINET functions, e.g. I-Device, Shared Device,
MRP (Media Redundant Protocol), IRT (Isochronous Real-Time)
and user-defined web pages.


The following features make the SIMATIC S7-400 the
most powerful controller:
- The S7-400 is especially suitable for data-intensive
tasks in the process industry. High processing speeds
and deterministic response times guarantee short
machine cycle times on high-speed machines in the
manufacturing industry. The high-speed backplane bus
of S7-400 ensures efficient linking of central I/O modules.

- The S7-400 is used preferably to coordinate overall
plants and to control lower-level communications lines
with slave stations; this is guaranteed by the high communication
power and the integral interfaces.

- The power of the S7-400 is scalable thanks to a graded
range of CPUs; the capacity for I/O is almost unlimited.

- The power reserves of the CPUs enable new functions
to be integrated without further hardware investment,
e.g. processing of quality data, user-friendly diagnostics,
integration into higher-level MES solutions or highspeed
communication via bus systems.

- The S7-400 can be structured in a modular way without
any slot rules; there is a wide range of modules available
both for centralized configurations and distributed

- The configuration of the distributed I/O of the S7-400
can be modified during operation. In addition, signal
modules can be removed and inserted while live (hot
swapping). This makes it very easy to expand the system
or replace modules in the event of a fault.

- The storage of the complete project data including
symbols and comments on the CPU simplifies service
and maintenance calls.

- Safety engineering and standard automation can be
integrated into a single S7-400 controller; plant availability
can be increased through the redundant structure
of the S7-400.

- Many S7-400 components are also available in a SIPLUS
extreme version for extreme environmental conditions,
e.g. for use where there is a corrosive atmosphere/condensation.