{{ :mervis-scada:mervis_scada.png?nolink&700 }}
====== Introduction ======
Mervis represents a modern SCADA application operated in the Cloud, accessible via the internet without the need for running your own server.
Individual users log in with their respective usernames and passwords. For logged-in users, the configured user rights apply, so each user sees projects and data only from the projects to which they are authorized to access.
The fundamental element is a **Project**, a group of data points typically representing a building, area, or technology.
A **Data Point** represents a measured value (e.g., outdoor temperature) or, conversely, a desired value or a command sent to controlled technology. The data point typically includes its value, timestamp (time of the last change), quality, and configured alarm behavior.
Each data point can store its history, which can be displayed using a Graph (see below).
==== Types of Data Points ====
|**Digital Input** |{{ :mervis-scada:new64.png?nolink&24x24 }}|Displays the state of a variable, often masked by expressions: YES/NO, ON/OFF, OK/ALARM (alarm points, commands, current modes, etc.).|
|**Digital Output** |{{ :mervis-scada:new65.png?nolink&24x24 }}|Writes the state of a variable, acting as a control element (modes, permissions, reset, etc.).|
|**Analog Input** |{{ :mervis-scada:new77.png?nolink&24x24 }}|Displays the value of a variable (temperatures, percentages, pressure, etc.).|
|**Analog Output** |{{ :mervis-scada:new66.png?nolink&24x24 }}|Writes the value of a variable (desired temperatures, pressure, power, setting equithermy, etc.).|
|**Controller Time** |{{ :mervis-scada:new78.png?nolink&24x24 }}|Represents the internal time of the connected device.|
|**Time Program** |{{ :mervis-scada:new63.png?nolink&24x24 }}|Displays a weekly schedule for a specific action, where hours and minutes of start/stop can be set for each day.|
|**Script** |{{ :mervis-scada:new76.png?nolink&24x24 }}|For specific requirements, custom functionality can be created for a data point (special reactions to certain events, specific numerical calculations, etc.), requires knowledge of JScript.NET.|
===== Login =====
On a computer with internet access, enter the web address [[https://scada.mervis.info|https://scada.mervis.info]], where the initial login screen is displayed.