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4 Tasks of the GLT x010
The controller GLT x010 is a freely programmable DDC (Direct Digital Control) according to IEC 61131-3. IEC
61131-3 includes the following languages:
Abbreviation Description Note
STL Statement List Text: A sequence of mnemonics and operators like in assembler
LAD Ladder Logic Graphic: Resembles an electrical wiring diagram lying on its side
FBD Function Block Diagram Graphic: Reminiscent of logic plans
SFC Sequential Function Chart Graphic: Sequence chains comparable with Petri nets
ST Structured Text Text: A high level language with the syntax of PASCAL
The programming environment used is CODESYS from 3S
1)
which is supplied with standard libraries. These
contain ready-made modules such as PID controllers, timers, counters, triggers, flip-flops, mathematical
modules, etc. With CODESYS, almost object-oriented programming with declaration of types and the use of
individual types in any number of independent instances is possible.
CODESYS has yet another powerful language that complements IEC 61131-3:
Abbreviation Description Note
CFC Continuous Function Chart. Free
graphical function block diagram editor.
The graphical function blocks can be freely arranged in the editor as in
an RI Flowchart. Feedbacks are allowed.
1)
: Protected trademark, see bibliography.
For individual control applications, e.g. in the field of refrigeration and building automation, the following
functions can be realised with the controller in combination with Virtus 5 and LDSWin:
Control functions
Regulation functions
Fault reporting
Fault archiving
Monitoring functions
Archiving functions
These functions depend on the individual programming of the controller.
Applications (examples)
Monitoring of safety equipment
Controls and regulation of heating circuits with monitoring of pumps and valves
Weather management
Hot water preparation, especially via heat recovery
Individual heat pump control systems
Integration of third party controllers via Modbus RTU
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