Glossary
Abbreviation/Term | Meaning |
|---|---|
DCS | Distributed control system |
DataAssembly | This is an MTP-specific term which means the set of data that describes the physical or virtual entity represented by a control, i.e., pumps, vessels, valves, PID controllers, etc. |
FB | Function block |
HMI | Human machine interface |
JS | JavaScript programming language |
MTP | Module Type Package |
OS | Operating system |
P&ID | Piping & instrumentation diagram |
PC | Personal computer |
PID | Proportional integral derivative |
PLC | Programmable logic controller |
POL | Process orchestration layer |
SCADA | Supervisory control and data acquisition |
Symbol | In TwinCAT HMI, a Symbol is an addressable data point exposed by the HMI server. Most commonly this is a PLC variable exported via the TMC, but it can also be a dynamic or internal Symbol. See the Terminology chapter for more detailed information. A Symbol is functionally analogous to a SCADA tag. |
SymbolExpression | A representation of Symbol as a string, for example: %s%ADS.PLC1.GVL_MTP.V03%/s% or %s%ADS.PLC1.GVL_MTP.V03::TagName%/s% See the Terminology chapter for detailed information |
SymbolPath | A representation of a Symbol as a path, for example: ADS.PLC1.GVL_MTP.V03 See the Terminology chapter for detailed information |
TMC | TMC (symbol file) is an XML-based symbol table generated from the PLC project. It defines which PLC variables (names, data types, attributes) are published by the TwinCAT runtime and thus become addressable symbols for clients such as the TwinCAT HMI server (ADS/OPC UA). |
UserControl | User control element in the TwinCAT HMI Engineering, which is represented by files with *.usercontrol and *.usercontrol.json extensions |
VDI | Verein Deutscher Ingenieure (English: Association of German Engineers) |
|
|