76 of 124  Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 8: Electrical Works  All operator interface functions such as communication drivers, graphical properties, reporting, storing  historical data, trend and alarm indicators, and development mediım are expected to be delivered as  integrated software package or package set. If software has to be supplied from more than one vendors  for meeting this specificatipn, software components and dealers should be given as separate list. Control and Surveillance Software which is present in Operator Interface Computer(hereinafter will be  referred as only Software) will be operated in Windows operation system environment. Infrastructure  where software will operate was is specified with detailed manner as following. Software will have  structure which can use all graphical and functional properties of current windows technology.  Software will be accessed over internet by TCP/IP protocol. Configurable web server will allow only  authorized persons to access process information. Process images which are prepared as Java applet in  web server can be monitored in Administrative units by standard web browser. Webserver will store  all connections. Software should support latest technology graphical techniqıes for visualization of plant(movable  graphs and animations. Software should have advanced alarm system. Alarms which exist in system  should be archived, should be classified according to priority order and should inform operator  visually and acoustically. Software should record events in system as event lof. At the beginning  which interventions are made by operators and when they intervened and software start up time should  stored in these events. Process data which are stored in software database should be displayed as trend  in time axis together with data value. Time axis should be able to be extended and narrowed by  operator without requiring any program. (zoom property). Stored format should be able to be accessed  by MS Office Programs (Excel, Access Etc). Software should be scalable such that user can start with small system and can extend database to any  size by only upgrading license. It should be able to add stations to system by only adding licenses and  configuring stations. No change should be required for supporting new additions in enabled stations  and project configurations. Performance  Software producers should have maintain minimum 5 plant references indicating that software will  meet following specifications.  60 workstations which are simultaneously connected;   200.000 variable tags from field devices   20.000 alarm tags from field devices  7.500 pieces historical trend tags which are read from field devices. Scalability  Software should be scalable such that user can start with small system and can extend database to any  size by only upgrading license. It should be able to add stations to system by only adding licenses and  configuring stations. No change should be required for supporting new additions in enabled stations  and project configurations. 8.19.2 Architecture (System Architecture)  Operator interface should consist of Operator Interface Subsystems and different server subsystems  which include following items for central operation.  I/O Devices subsystem  8_Vol3_d4.3_Section 8 electrical works_en_GIR.rev8.doc 