|
|
Inguletskiy and Severniy mining and processing complexes – large enterprises for the extraction ferruginous quartzites open way, their enrichment and the production of iron ore concentrate. The elaboration of SCADA system has been held in order to exclude outdated equipment, served for data acquisition, changing it for new devices and software.
Main tasks of the system, data acquisition and processing about:
- registration of service water supplied during the preparation process;
- electric power consumption in users, subscribers and the complex itself;
- ore processing in semi-sections of dressing factories of the complex;
- work time and downtime of the main technological equipment;
Creating of:
- local informational network for reception, transmission and displaying of technological information (of supervisory stations);
- general operational system of the complex, based on SCADA;
- technological data for supervisory control on the complex;
The information comes into the system from various kinds of sensors, with system working on unified signals (4-20 mÀ, 0-10 V etc.). Throughout control cables the sensor signals come onto the entrance terminal boards of DAQ unit (Data Acquisition Unit). There they are transformed into the signals of TTL level and connected to the input-output boards. DAQ unit is a casual PC, a matched controller, storing and processing the information given and transmitting it to the remote access server. The mode of the system is automatic and continuous.
The system has its hierarchy and consists of three levels. The lowest one is the level of sensors. The middle is DAQ unit level. The upper one is the level of servers. On the middle level DAQ unit can form groups.
There are several DAQ unit operation modes. According to them acquisition, control and operation by various sequences and signals are held. These operation factors enable to define sequences of response of mechanisms and classify these or that developments unequivocally. Furthermore, in case of rupture of the detached communications with remote DAQ unit the accumulation of the data is being held in their internal memory with corresponding signals on the server. After resuming the out-of-order line the accumulated data without any loss are transmitted to the server and archived. It helps to avoid the loss of operation of the aggregates in case of unexpected rupture of connection. Due to the implementation of the system enterprise management opened up the possibilities to react on the enterprise processes on-the-fly, and to receive the information about the remote objects in a long distance. |
|
