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KTC DCS has a software package for PC’s and controller installations.This package is divided into 5 parts:
1. Local Controller Unit (LCU)This sub-system is responsible to gather analog/digital data from IO boards and performs control routines and loops (such as inter-locks and PID loops) and sequence controls. This unit can handle all sorts of process controls such as, Logic control, Sequence control, Computational algorithms, Control algorithms and Simulation. And also supports:
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2. Data Acquisition Server (DAS)DAS is responsible for the communication between LCU and OWS. In some applications the DAS software can also be redundant and run on two different computers. This subsystem receives the event messages from LCU and analyzes them for alarm handling. |
3. Operating Work Station (OWS)
The OWS is an interface between users and DCS systems. By using this system via various displays, the operator can handle all his actions. Different types of displays allow the operator to easily handle a large amount of data in different textures and graphical formats. For each control loop, OWS allows the operator to perform all normal control functions and monitoring the results of these actions.
For each function available in OWS there is an access flag that must be set by engineers during the configuration phase, so users of these systems (Operators, Engineers, Supervisors) have different levels of access for their operation.
Different types of displays available in these systems are Process display, Group display, Object display, Trend display, Alarm list display, Event list display
4. Historical Server (HIS)
For historical applications and analysis historical data, it is required to take samples from real time data and then archive them in a database. The data can be re-loaded from databases and historical applications can be undertaken. Usually Microsoft SQL server is used as a database engine for storing data. The HIS package connects to this server for showing data in graphical trends.
5. Engineering Work Station (EWS)
EWS is a suitable place for configuration of the DCS system. The system operator can define or edit all parts of the system, including LCU, DAS, OWS, HIS, and all other Subsystems in the DCS including their different libraries.
The configuration consists of:
- System architecture and station relatives.
- Process databases and related parameters.
- Different type of process displays.
- Different type of graphical blocks.
- Programming control routines and loops.
- Users, user groups, and their accessibility features.
- Alarm/Event, Network and Printers.
- Different type of graphical blocks.
- Programming control routines and loops.
- Users, user groups, and their accessibility features.
- Alarm/Event, Network and P
