Encyclopedia

program scan

program scan

[′prō·grəm ‚skan]
(control systems)
The span of time during which a programmable controller processor executes all the instructions of a given program.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
Users can selectively enable or disable scans, program scan intervals, and customize reports.
The exact position at which the cutter stops can vary as the delay between the rest position input changing state and the command signal going to zero depends on current CPU utilization, program scan time, etc.
The thermoformer's PLCs do a 50-millisec program scan, while the DEC/Smart data-management program takes 20 sec to scan, but that's fast enough to record every thermoforming cycle.
The thermoformer's PLCs do a 50-millisec program scan, while the DEC/Smart data management program takes 20 sec to scan, but that's fast enough to record every thermoforming cycle.
The program scans the user's PC for any outdated or missing device drivers and provides a detailed report on any issues that have been detected.
The program scans sky survey images from a 48-inch telescope at the Palomar Observatory in Southern California and flags regions that show sudden brightening, which astronomers take as potential signs of supernovas, In August 2010, researchers followed up on one such brightening 500 million light-years away and confirmed that it was a type 2 supernova, an explosion of a massive star whose core runs out of fuel and collapses.
Its program scans, diagnoses and repairs Windows operating systems, restoring full functionality and replacing damaged files.
Beginning with one crash, a computer program scans out 25 meters and if another crash took place within that area, it scans another 25 meters and continues doing so until it stops finding accidents.
After placing the first block, the program scans the netlist and schematic PDF to identify matches between components and blocks.
The program scans both databases and displays the combined schema tree view, with all differences color-marked.
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