SIMATIC S7-400 SIEMENS PLCS PROCESS CONTROLLER

The S7-400 is the most powerful PLC in the family of SIMATIC controllers. It enablesS7-400 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.

S7-400
  • 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
  • User-friendly connections
  • Optimal communication and networking options
  • User-friendly handling and uncomplicated design without a fan
  • Can be expanded without problems when the tasks increase
  • Multicomputing:
    Simultaneous operation of several CPUs in one S7-400 central controller.
    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.

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Features of the S7-400

Features of the S7-400
The S7-400 programmable controller combines all the advantages of the previous system with those of a new system and new software. These are:
• A graded CPU platform
• Upwardly-compatible CPUs
• Enclosed modules of rugged design
• Convenient terminal system for the signal modules
• Compact modules with a high component density
• Optimum communication and networking facilities
• Convenient incorporation of operator interface systems
• Software parameter assignment for all modules
• Extensive choice of slots
• Operation without fans
• Multicomputing in the non-segmented rack

S7-400 Application

S7-400 Application

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
  • Warehousing technology
  • Steel industry
  • Building management systems
  • Power generation and distribution
  • Paper and printing industry
  • Woodworking
  • Food and beverages industry
  • Process engineering, e.g. water and wastewater utilities
  • Chemicals industry and petrochemicals
  • Instrumentation and control
  • Packaging machinery
  • Pharmaceutical industry
S7-400 communication

S7-400 communication

The SIMATIC S7-400 has different communication options:

  • Combined multipoint interface and DP master, integrated into all CPUs:
    For the simultaneous connection of PGs/PCs, HMI systems, S7-200 and S7-300 systems and other S7-400 systems.
  • Additional PROFIBUS DP interface, integrated into several CPUs for cost-effective connection of distributed I/O systems, e.g. ET 200.
  • Integral PROFINET interface on PROFINET CPUs for connections to distributed I/O systems, or communication with other controllers and PC systems.
  • Communications processors for connecting to the bus systems PROFIBUS und Industrial Ethernet.
  • Communications processors for the powerful point-to-point connections.
DESIGN

The SIMATIC S7-400 is available in several versions:

  • S7-400:
    The power PLC for the mid to high-end performance ranges with modular, fan-free design.
  • S7-400H:
    Fault-tolerant automation system with redundant design for fail-safe applications.
  • S7-400F/FH:
    Fail-safe automation system with redundant design that can also have high availability.
S7-400

The S7-400 automation system is modular in design. It has a comprehensive range of modules that can be combined individually.

A system includes the following:

  • Power supply module (PS):
    for connecting the SIMATIC S7-400 to a supply voltage of 120/230 V AC or 24 V DC.
  • CPUs:
    Different CPUs with integral PROFIBUS DP interfaces are available for different performance ranges. Depending on type, they are also available with integral PROFINET interface. The PROFIBUS interface enables the connection of up to 125 PROFIBUS DP slaves. Up to 256 PROFINET IO devices can be connected to the PROFINET interface. All CPUs of the SIMATIC S7-400 can handle extremely large configurations. In addition, several CPUs can work together in multicomputing in one central controller to increase performance. The CPUs enable short machine cycle times by means of their efficient processing speed and deterministic response times.
  • Signal modules (SMs) for digital (DI/DO) and analog (AI/AO) input/output
  • Communications processors (CPs), e.g. for bus connection and point-to-point connections
  • Function modules (FMs):
    The specialists for demanding tasks such as counting, positioning and cam control.

Technical specifications

CPU 412-1 CPU 412-2 CPU 414-2 CPU 414-3
Main memory
· integrated
· in instructions
· for program
· for data
96 Kbyte
32 K
48 Kbyte
48 Kbyte
144 Kbyte
32 K
72 Kbyte
72 Kbyte
256 Kbyte
84 K
128 Kbyte
128 Kbyte
768 Kbyte
84 K
384 Kbyte
384 Kbyte
Load memory
· integrated
· expandable to
256 Kbyte RAM
64 Kbyte
256 Kbyte RAM
64 Kbyte
256 Kbyte RAM
64 Kbyte
256 Kbyte RAM
64 Kbyte
Backup Yes Yes Yes Yes
Number of blocks
· FB
· FC
· DB
256
256
511 (DB 0 reserved)
256
256
511 (DB 0 reserved)
2048
2048
4095 (DB 0 reserved)
2048
2048
4095 (DB 0 reserved)
Program execution
· free cycle
· timed interrupts
· delay interrupts
· time interrupts
· process interrupts
· multi-computing interrupt
· startup
1
2
2
2
2
1
3
1
2
2
2
2
1
3
1
4
4
4
4
1
3
1
4
4
4
4
1
3
Execution times
· bit operations
· word operations
· fixed point arithmetic
· floating point arithmetic
2 µs
2 µs
2 µs
3 µs
2 µs
2 µs
2 µs
3 µs
0.1 µs
0.1 µs
0.1 µs
0.6 µs
0.1 µs
0.1 µs
0.1 µs
0.6 µs
Bit memories/timers/counters
· Bit memories
· S7 timers/S7 counters
· IEC timers/IEC counters
4 Kbyte
256/256
SFB/SFB
4 Kbyte
256/256
SFB/SFB
8 Kbyte
256/256
SFB/SFB
8 Kbyte
256/256
SFB/SFB
Design
· Number of expansion units
· Number of DP masters, through CP
· Number of FMs
· Number of CPs
21
max. 10
limited by number of
slots and number of
connections
limited by number of
slots and number of
connections
21
max. 10
limited by number of
slots and number of
connections
limited by number of
slots and number of
connections
21
max. 10
limited by number of
slots and number of
connections
limited by number of
slots and number of
connections
21
max. 10
limited by number of
slots and number of
connections
limited by number of
slots and number of
connections
Programming interface
· Number of stations
· Transmission speed
16
max. 12 Mbit/s
16
max. 12 Mbit/s
32
max. 12 Mbit/s
32
max. 12 Mbit/s
DP interface
· Number of stations
· Transmission speed
32
max. 12 Mbit/s
32 + 64
max. 12 Mbit/s
32 + 96
max. 12 Mbit/s
32 + 2 x 96
max. 12 Mbit/s
Address ranges
· Total I/O address area
· I/O process image
· Total digital channels
· Total analog channels
4 Kbyte /4 Kbyte
4 Kbyte /4 Kbyte
32768/32768
2048/2048
4 Kbyte /4 Kbyte
4 Kbyte /4 Kbyte
32768/32768
2048/2048
8 Kbyte /8 Kbyte
8 Kbyte /8 Kbyte
65536/65536
4096/4096
8 Kbyte /8 Kbyte
8 Kbyte /8 Kbyte
65536/65536
4096/4096