WATLOW ANAFAZE CAS200 controller panel

WATLOW ANAFAZE CAS200 controller panel

The difference between DCS and Siemens PLC is as follows: 1. DCS is a “decentralized control system”, while Siemens PLC (programmable controller) is just a control “device”. The two are the differences between “system” and “device”. The system can achieve the functions and coordination of any device, while Siemens PLC devices only achieve the functions that this unit has.
2. In terms of network, DCS network is the central nervous system of the entire system, which is a safe and reliable dual redundant high-speed communication network, and the system has better scalability and openness. Siemens PLC, on the other hand, mainly works as an individual and uses a single network structure when communicating with other Siemens PLCs or upper computers. The network protocol often does not comply with international standards. In terms of network security, Siemens PLC does not have good protection measures. We adopt dual redundancy of power supply, CPU, and network.
3. DCS considers the overall plan, and the operator station has the function of an engineer station. After the installation of the operation plan program, there is a close joint relationship between stations. Any station, any function, and any controlled device are interlocked and controlled in a coordinated manner; The connection between stations (Siemens PLC and Siemens PLC) in a system composed solely of PLC interconnections is a loose connection and cannot achieve coordinated control functions.