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| Master Controller Dual redundant configuration The following functions are incorporated in master controller; - Speed/Load Control - Valve position control - Power load unbalance (if applicable) |
| OPS:Operator Station Operation and monitoring of steam turbine can be performed from OPS in main control room. The functions are; Schematic display, Group display,Group operation, Trend graph, X-Y plot, Event and alarm list, and logs, etc. Application software at HMI is Microsoft® Windows® 2000 based, and usual operation for Microsoft® Windows® is available. |
| TSI modules Turbine supervisory instrument modules are incorporated in D-EHC cabinets, and monitoring for TSI is available on OPS. |
| Value interface Value interface consists of solid-state and analog modules. It treats I/O signals between master controller and local instruments, such as position detector or Electro-hydraulic converter at each valve. |
| Interface with external system Redundant RS232C Modbus® interface is provided as standard. |
| System Controller Dual redundant configuration, with hot standby feature. The following functions are incorporated in system controller; - Automatic turbine startup sequence control - Turbine auxiliaries control - Interface with external systems, such as plant DCS |
| Programmable logic device Solid-state based programmable logic circuits implement the turbine protection logic. Voting logic from redundant local sensor is basically applied to enhance the protection reliability. |
| Maintenance and support tool IES (Integrated Engineering Station) is incorporated in OPS. The functions of IES are generation / modification of database, graphics, control logic, and Log & Report format. A dedicated tool (portable PC) for master controller is also provided. |
