Graphical interfaces for monitoring ladder logic programs

Details Graphical interfaces for monitoring ladder logic programs Graphical interfaces for monitoring ladder logic programs

1990-07-20

1994-06-14

Kulik, Paul V.

Excavating

395159, 371 291, 364147, 364DIG1, 3642751, G06F 900

Patent

active

053218299

ABSTRACT:
A menu-driven system for developing Man-Machine Interfaces (MMI) for use in the graphical monitoring of ladder logic programs executing in programmable logic controllers PLCs. The Man-Machine Interfaces graphically depict plant processes controlled by the PLC. Data from the PLC representing plant process events (flows, state changes, tank levels, etc.) are communicated to the Man-Machine Interfaces. A Development System provides a programmer's "tool box" for constructing the Man-Machine Interfaces. Ladder logic programs and databases associated therewith are imported and accessed by the Development System for use in the development of the Man-Machine Interfaces. A Runtime System provides an execution environment for the Man-Machine Interfaces. The Runtime System has the ability to access ladder logic programs during monitoring operations. A user can "hot-key" to the ladder logic program for trouble-shooting purposes.

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