The traditional DCS system can not meet the design standards and requirements of the automatic process control system in the 1990s. The SIMATICPCS7 process control system is a new generation process control system developed under this situation. It is a fully integrated, structurally complete and functional. Process control system for the entire production process. SIMATIC PCS7 is an advanced process control system for all process control applications based on Siemens' S5, S7 series programmable controllers and TELEPERM series of distributed systems based on the most advanced computer software and hardware technologies.
PCS7 is Siemens' DCS system, based on process automation, from sensors, actuators to controllers to upper computers, to form a complete TIA (Total Integrated Automation) architecture from the bottom up. It mainly includes Step7, CFC, SFC, SimaTIc Net and WinCC, and PDM software. The configuration object uses S7-400 high-end CPU, which is generally used in steel and petrochemical industries.
SIMATIC PCS7 uses excellent PC software WinCC as the man-machine interface for operation and monitoring. It uses on-site fieldbus and industrial Ethernet to realize on-site information collection and system communication. The S7 automation system is used as the field control unit to realize process control. The distributed I/O receives the field sensing detection signal.
SIMATIC PCS7 is a system based on the concept of Totally Integrated Automation. The core of its integration is a unified process database and a unique database management software. All system information is stored in a database and only needs to be input once, which greatly enhances the system. Integrity and accuracy of information.
The communication system of SIMATIC PCS7 uses Industrial Ethernet and PROFIBUS fieldbus. Industrial Ethernet is used for data communication between system stations.
SIMATICPCS7 uses programming software and field device libraries in accordance with IEC61131-3 international standards, providing continuous control, sequential control and high-level programming languages. The field device library provides a large number of commonly used field device information and function blocks, which greatly simplifies configuration and shortens engineering cycles. SIMATICPCS7 has standard interfaces such as ODBC and OLE, and it has an open network such as Ethernet and PROFIBUS field bus. It has strong openness and can be easily connected to the host computer management system and other manufacturers' control systems.
The difference between PCS 7 and DCS/PLCPCS7 is not equivalent to Step7+WinCC. Many templates and pictures in the OS in PCS7 are automatically generated in Step7 with CFC and SFC. The variable records and alarm records are also transferred to WinCC by Step7. It is not necessary to manually configure pictures, variable records and alarm records as with normal WinCC.
PCS7 Complete Works Automation
PCS modular structure
The scale of control can be tailored to the actual needs of users.
Easy to expand and adjust
Modular architecture that scales from the smallest single station to a large system with a client server architecture
Maximum support:
12 redundant servers
5000 control] loop / server
32 client/server
64 control station / server
Advantages of PCS7 over traditional DCS systems
1, the system is complete and open and flexible
100MB ETHERNET TCP/IP
Integrated fieldbus technology PROFIBUS
2, global relational database: SQL
3, with a strong diagnostic function, not only provides system diagnostics, but also provides intelligent device diagnostics
4, configuration software is rich, easy to use
5, the controller uses a multi-tasking processor, while achieving a large number of complex loop control and fast logic control
The difference between PCS and WinCC and Step 7
PCS7 is the DCS system of Siemens
Step7+ Wincc is a PLC system PCS7=Step7+WnCC+CFC+SFC, which contains many blocks and icons required for process control system programming for factory automation systems.
PC77 can be implemented using Step7 and Wincc, but programming is more complicated, PCS7 uses graphical programming.
Siemens dcs control system (composition of PCS 7)
The controller of the AS station comes from the powerful S7-400 family
It has been configured, integrated in a rack and tested
CPU S7414-3, S7416-2, S7416-3, S7414-4, S7417-4
With integrated profibus - dp interface
Integrated MPI interface
RAM768to4,000kB
Power supply (24VDC, 120VAC, 230VAC)
Card with Ethernet communication
Controller optional redundancy
Free integration and testing
USB2.0 has USB A USB B
USB A has female housing plug-in pin SMT, female 90 degree plug-in, female 180 degree plug-in, male housing plug-in pin SMT, male 90 degree plug-in, male 180 degree wire bond.
USB B shell plug-in Pin SMT, female 90 degree plug-in, female 180 degree plug-in, male 180 degree shell plug-in,
Usb2.0 is a new interface technology used in the computer field. The USB interface features faster transfer speeds, hot swapping, and connectivity to multiple devices. It has been widely adopted in various external devices.
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