Architecture DCS

DCS architecture of each manufacturing company may have different structures according to the design of each manufacturer’s production company, but DCS all companies have to share equipment in the DCS of a functional and operational responsibilities are Engine unit (module) always consists of the DCS Although each manufacturer has a different name, but must consist of DCS units are similar tools.

1. Unit connected to the process (process interface module) is a device interface between DCS and process to receive the signal measured by the production process to the DCS and control signals from the DCS to the manufacturing process. Processing units connected to basic unit consists of DCS analog input (analog input module) unit analog output (analog output module) unit digital signal (digital input module) and digital transmission unit (digital output module).

2. Unit process (process control module) is the main equipment of DCS for process control. By the data processing unit connected to the process to calculate the value of the control signal and send it back to the process units connected to process control unit connected again to contact the unit processes, process control networks. DCS sub-low speed control of the basic process consists of the DCS control and direct digital control stick and fire.

3. Unit Contact and staff functions (operator interface module) and the Laboratory of Engineers (engineerint workstation) is a device interface between DCS and power users, engineers and general staff DCS may spin contact and enter Ki Operation of employees and Engineering is the second set of equipment or devices sharing a single set of contacts and act as a unit’s operating staff and engineers. Unit contacts and skills last year’s Operation staff serves as staff, equipment Nื contact for monitoring and process control. Unit Ki Operating Engineers serves as the DCS equipment fitted to the Engineer for the structure of control systems and equipment connected to the DCS system. Of the details and the order of the graphics for the employees. Shows the trend of record-keeping process history. And warning events of DCS.

4. Unit connected to the network. (Communication module) device is a device for connecting all parts of the DCS network communication. Unit connected to the network initially will link DCS process control equipment with equipment and laboratory staff to contact.

5. Storage and historical processes (process data and history module) as storage devices for process control of the DCS and the history of the process data storage and historical process of the DCS are often installed with the unit interface and operation of employees and engineers. However, DCS may be separate storage devices, and historical processes are independent devices connected to their network communications. Storage devices include basic DCS Nื types of magnetic data storage (magnetic disk) and magnetic tape (magnetic tape).

6. Unit connected to a computer network (computer network interface module) is a device connected to the network of the DCS network of other computers for data collection and management control system, DCS can connect to a computer outside the system DCS. The devices use a Nื contact and connection of the unit’s operating staff and engineers. Or connect directly by the DCS network devices connected to computer networks.

7. Unit connected to the instrumentation sub (subsystem interface module) is a device connected to the DCS tool in an external control system, DCS, such as PLC, gas chromatography graph (gas chromatograph) devices to send and receive data remotely. (remote input / output device) and other tools to control the processor’s own DCS can interact with other tools in the control system via the network sub-unit connected to the process, or connected to the network communication of the DCS directly using sub-unit connectivity tools, as well as connect to other network computers.

8. The power unit (power supply module) is equipped with the power to all devices of the power of the DCS equipment. Served eliminate noise and adjust the power off to suit various devices of DCS and store energy reserves for DCS.

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