## 8.19.1 General system description 

A computer based control and monitoring system (also known as a SCADA system: Supervisory Control And Data Acquisition System) shall be provided for automatic control and monitoring of the treatment plant. 

The system, in the following known as the CMS (Control and Monitoring System), shall be used for the following: 

 Supervision of the treatment plant 

 Monitoring of alarms and status of the treatment plant 

 Changing of timers and parameters 

 Calculations 

 Real-time collection and storing of data and alarms 

 Handling of data and alarms 

 "Forced" stop and start of components from the operator station 

 Automatic control of part of the treatment plant process 

 The monitoring part consists of two rack type Server with monitoring software and a printer. 

Giresun Wastewater Collection System together with seven (7) wastewater pumping stations (Aksu, Boğacık, Saz, Teyyaredüzü-TM2, Küçükköy, Eriklimanı, Göksüz) shall be constructed in the scope of “Lot 2 Construction of Giresun Wastewater Collection System” of this tender. The SCADA system for the operation of wastewater puming stations is established in the scope of Lot2 part. All signals obtained from new waste water pumping station shall be sent to a WWTP SCADA center located in the Administration Building of the Giresun WWTP by the Contractor of Lot2 tender. This Control Room is also used to command/control of the SCADA system of the WWTP. However, the Pumping Station RTU system and communication shall implemented SCADA System of the WWTP. 

The control part consist of a distributed system with distributed local intelligent controllers (PLC’s 's) to carry out the control and monitoring of the equipment connected to the PLC’s 's. The PLC’s 's will work autonomously if the communication network fails and the control will continue. 

The system shall be designed to operate 24 hours a day without any necessity of attendance from the personnel. 

The requirements for the control and monitoring system are described in the following. 

Automatic control of the component shall be possible when the control switch for the component in the front of the panel is in the position "auto". 

By-pass of the PLC control will be possible when the control switch is in the position "manual". 

The CMS consist mainly of the following hardware components: 

 rack type 2 server and 2 operator station 

 Report and graphic printer 

 Industrial network 

 PLC’s s 

 Distributed I/O modules 

