Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1995-11-01
1998-09-22
Saras, Steven J.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
395568, 395704, G06F 1300, G06F 900, G06F 945
Patent
active
058121331
ABSTRACT:
An industrial controller executing a graphical language employs a comparator circuit for monitoring the address locations of memory used to store the control program and its data. A cursor positioned on a graphics representation of the program is used to identify a particular graphical element to be monitored and the address of the starting instruction for that element is loaded into the comparator. An interrupt generated by the comparator causes the generation of a histogram listing the particular rungs name and the times at which it has been executed, useful for verifying and monitoring the operation of a control program. A snapshot of data values used by the element of the program at the time of its execution may also be stored to verify the condition under which the element executes.
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Rischar Charles M.
Rohn David R.
Schultz Ronald E.
Allen Bradley Company, LLC
Baxter Keith M.
Bell Paul A.
Horn John J.
Miller John M.
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