Other tag names we can find are: registers, I / O, variables. In SCADA systems, we can encounter a limited number of tags, that is, possible defined variables, on the basis of which we will develop SCADA visualization. sensor status or pressure value) has its own unique tag or symbol, from which we can refer to a given variable. TAGS – in SCADA systems, data read from devices are saved in a database or files, e.g. For example Driver for SIEMENS controllers, Modbus RTU driver, driver for Mitsubishi PLC. Even simpler, they are “translators” of data: SCADA understands data from PLC and PLC understands questions and orders of SCADA.ĭepending on the SCADA manufacturer, additional drivers can be paid. Drivers are controllers of the SCADA system, which allow for the communication with the devices having data, e.g.
Based on these data in the SCADA application, we can view chart patterns, generate reports, react to alarm states and make appropriate decisions about the further course of the process.ĭRIVERS – In every SCADA system we can meet with the word DRIVER. SCADA communicates with these controllers, reading states from sensors and measurement values from transducers (e.g. The information (data) comes from devices such as PLCs to which sensors and measuring transducers are connected. SCADA is a software (IT system) that collects information from an object (supervises the course of a technological or production process) and displays it on monitors, e.g. Perhaps you have heard about SCADA, but you not quite feel it. The list is open, which means that we can add another positions. Below you can find the list of free SCADA systems (Supervisor Control And Data Acquisition), which are completely free or have some limitations, but still allow for usage and tests.
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