SIMATIC S7-400 offers various communication options:
• Partially integrated CPU with PROFINET interface, suitable for connecting to distributed I/O systems orSupervisor station
• Combination of MPI and DP main interfaces, integrated within all CPUs, S7-200With the S7-300 system and other S7-400 systems.
• Additional PROFIBUS-DP interface, integrated in some CPUs, suitable for economicET-200 Distributed I/O System
• Communication templates for connecting to PROFIBUS and industrial Ethernet.
• Communication template for robust point-to-point connections.
• Process Communication: Cyclically addressing I/O modules via bus (AS-I or PROFIBUS)Board (Process Image Data Exchange). Process communication from cyclic execution level.
• Data Communication:
Data exchange between automated systems or between an HMI station and several automated systemsData communication can be executed cyclically or invoked by user program blocks on an event-driven basis.
Through PROFINET process and data communicationThe integrated switch within the CPU offers two PROFINET interfaces, allowing for not only...TCP/IP and upper-level connections can enable the following functions:
Equipment Sharing
Smart Devices
• Synchronous timing
• Media Redundancy
Open communication
CPU412-2PN, CPU414-3PN/DP, and CPU416-3PN/DP integratedPROFINET interface, for full-duplex operation over switched Ethernet with a bandwidth of 100 Mbit/sBased on this, the following equipment can be connected:
• ET200 Distributed I/O
Field equipment
• SIMATIC S7 Series Controllers
Switch
• Programmer
Process communication via PROFIBUS-DP
Overview of Data Communication
SIMATIC S7-400 as the DP master station, can be integrated with the SIMATIC S7-400PROFIBUS-DP interface on CPU (optional)The following equipment can be connected as a master station to the PROFIBUS-DP network:
• SIMATIC S7-400（CPU，CP 443-5）
• SIMATIC S7-300 (CPU, CP 342-5DP or CP 343-5)
A programmer (PG)/PC or OP with STEP 7 can act as the master on the bus.The station can run on PROFIBUS-DP, but it can also operate using only the programmer and OP functions.The following equipment can be used as slave stations to connect to the PROFIBUS-DP.
• ET200 Distributed I/O Device
• On-site equipment
• SIMATIC S7-200，S7-300
• SIMATIC S7-400 (accessible only via CP 443-5)
Data Communication Overview
SIMATIC S7-400 serves as the DP master station, and can be integrated with SIMATIC S7-400
PROFIBUS -DP interface on the CPU (optional)
The following equipment can be connected as a master station to the PROFIBUS-DP network:
• SIMATIC S7-400（CPU，CP 443-5）
• SIMATIC S7-300 (CPU, CP 342-5DP or CP 343-5)
A programmer (PG)/PC or OP with STEP 7 can act as a master on the bus.The station can also operate on PROFIBUS-DP using only the programmer and OP functions.The following equipment can be used as slave stations to connect to the PROFIBUS-DP.
• ET200 Distributed I/O Device
• On-site equipment
• SIMATIC S7-200，S7-300
• SIMATIC S7-400 (accessible only via CP 443-5)
SIMATIC S7-400 features various communication mechanisms:
• Through Global Data (GD) communication, CPUs on the network can periodically exchange dataData package.
• Utilize communication function blocks for event-driven communication between various sites on the network.Connectable via MPI, PROFIBUS, or PROFINET/industrial Ethernet.Data communication via Multi-Point Interface (MPI)The Multi Point Interface (MPI) communication interface is integrated within the CPU of the SIMATIC S7-400.
Its applications are versatile:
Programming and parameter settings
Control and surveillance
Establish a simple network structure among equivalent communication partners
• Multiple connection capabilities: MPI supports simultaneous connections with up to 32 sites.
－ PG/PC，
HMI System
S7-200 (as a slave station)
－ S7-300
－ S7-400
Communication Connection
The S7-400 CPU can simultaneously establish connections to over 64 stations.
- To MPI node
- To the C-bus node on the relevant C-bus (internal communication bus, see below)(For example, communication templates), as well as the various sections that can be connected to the communication templatesPoints, such as: Industrial Ethernet nodes. Communication templates are C-bus nodes.
• MPI Performance
- 32 more MPI nodes
- Data transmission rate is 12 Mbit/s
Flexible configuration options:
Field-tested components for MPI communication configuration:
Bus cables within the range of PROFIBUS and distributed I/O products, bus connectionsAnd RS-485 repeater (12 Mbit/s). These components enable the configuration to reachCustomized to fully meet user requirements. For example, any two given MPI nodes
Long-distance bridging between points can link up to 10 repeaters.
• DP Master Station: The MPI of S7-400 can also be configured as a DP Master Station, and it can be connected32 additional DP slave stations, communication speed up to 12 Mbit/s, programming and human-machine interfaceThe functionality remains unchanged.
Through MPI, interconnected CPUs communicate via the global data communication service (each program loop)Additional 64 B of data packets (plus 16 more data packets) are exchanged in cycles.One CPU can access another CPU's data/bit storage/process image.
For example, if the system includes S7-300, data exchange is limited to each packet not exceedingOver 22 B.
Global data communication can only be used with the MPI interface, configured via the GD table in STEP 7.
In the CR2, the 2 CPUs communicate via the C bus using GD data packets.
Communication services between S7/C7 communication objects are processed through functional blocks integrated into the system.
Communication services between S7 communication objects are performed through functional blocks integrated into the system.
Communication services available include:
• S7 Standard Communication with MPI
• S7 Communication with MPI, CAN bus, PROFIBUS, and Industrial Ethernet. (S7-)
300 units are for server use only.
Communication services with the third-party equipment can be established using non-resident blocks, which include:
• Communication compatible with S5 via PROFIBUS and Industrial Ethernet.
• Standard communication via PROFIBUS and Industrial Ethernet (for third-party systems).
In contrast to global data communication, establish corresponding communication links for the communication function.
Through CP's data communication (point-to-point)
The CP 441 communication template enables powerful point-to-point communication.
• Possibilities of various interfaces, including:
- Programmers and personal computers
－ SIMATIC S5/S7
Industrial PC
Third-party programming controller
Scanner, Barcode Reader, ID System
Robot Controller
Printer
• Various types of interfaces: Interchangeable interface templates can be transmitted through multiple transmission media
Communication
－ 20 mA（TTY）
－ RS 232C（V.24）
－ RS 422/485
