The PLC software performs the following functions:

Interrogation of discrete and analog inputs at the local PLC garbage can, expansion garbage can, and remote stations;

Primary conversion of input signals (debounce and validation, analog signal conversion, warning and alarm limit evaluation;

Execution of fast subroutines in accordance with the algorithms of emergency protections;

Verification of interlocks;

Execution of basic control algorithms, including PID controllers;

Providing information to the upper level, receiving commands from the upper level

Issuing control signals to discrete and analog outputs of local PLC baskets, expansion baskets, and remote I/O stations;

Communication exchange over digital interfaces (ProfibusDP, ModbusRTU, ModbusTCP, etc.).

We own the necessary licenses for the instrumental software, so the cost of development includes only labor intensity and the author’s developments on the application software. However, on customer’s request we can supply instrumental software with all necessary licenses, allowing the customer to make changes in the application program independently.

SCADA-system software performs the following functions:

Provides the operator with an interface to operate the SCADA system in the form of process mnemonic diagrams, control panels and information windows. Information is provided in visual-graphic, numeric, tabular and graphical forms;

Exchange of information with the PLC;

Archiving information and event logs, and viewing archives;

Forming reporting forms and documentation;

User rights management.

SCADA-system software operates under Windows operating system. Runtime license is required for operation, which is purchased separately for each SCADA-system workstation. The cost of the license depends on the number of points (tags, I/O channels) in the system, the need to purchase specific drivers, the need for additional services such as full-function archiving, the provision of WEB-interface, etc.