F6705 8-channel analog output module
F6705 is an HIMA dark horse 8-channel analog output module
Distributed control system is a new generation of instrument control system based on microprocessors, adopting the design principles of decentralized control functions, centralized display operations, balancing separation and autonomy, and comprehensive coordination. Distributed Control System, abbreviated as DCS, can also be translated as “Distributed Control System” or “Distributed Computer Control System”.
It adopts the basic design concept of decentralized control, centralized operation and management, and adopts a multi-level hierarchical and cooperative autonomous structural form. Its main feature is its centralized management and decentralized control. DCS has been widely used in various industries such as power, metallurgy, and petrochemicals.
DCS usually adopts a hierarchical structure, with each level consisting of several subsystems, each subsystem achieving specific finite goals, forming a pyramid structure.
Reliability is the lifeblood of DCS development, and there are three main measures to ensure the high reliability of DCS: first, widely use high reliability hardware equipment and production processes; Secondly, redundancy technology is widely adopted; The third is to widely implement fault-tolerant technology, fault self diagnosis, and automatic processing technology in software design.
The characteristics of PLC
PLC is a programmable logic controller, which uses a programmable memory to perform logical operations through stored programs, or to perform sequential control, counting, timing, and arithmetic operations through user instructions. It controls various types of mechanical production or production processes through analog or digital inputs or outputs. PLC has evolved from controlling switch quantities to performing sequential control or arithmetic processing, which involves transportation and processing from lower to higher levels, as well as arithmetic processing from bottom to top. PLC has multiple functions such as continuous and uninterrupted HD control. PID in interrupt stations: PLC can use one PC as the master station, multiple PLCs of the same model as the slave station, and PLC can also use one PLC as the master station and the same model of PLC as the slave station to form a PLC network. The convenience of the latter is that when users program, they do not need to understand the communication protocol and can write according to the format in the manual; The PLC grid can not only be used as an independent DCS/TDCS, but also as a subsystem of DCS/TDCS; PLC system is consistent with DCS/TDCS
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