- Отрасли: Automation
- Number of terms: 8432
- Number of blossaries: 0
- Company Profile:
Rockwell Automation, Inc. provides industrial automation power, control, and information solutions.
Units of measurement (such as pounds, pounds per square inch, degrees Celsius) relative to the process. An input signal is often a percentage of the full-scale range (such as ±5 Volts, or 4–20mA) of direct measurement that must then be converted, through scaling, into engineering units. See scaling
Industry:Automation
An I/O module that contains circuits that convert dc signals from a machine/process switching device to backplane logic level dc signals. By implication, they are direct digital inputs.
Industry:Automation
The process of absorbing and clipping voltage transients on an incoming ac line or control circuit. MOVs (Metal-Oxide Varistors) and specially designed R-C networks are usually used to accomplish this.
Industry:Automation
1) For A/D conversion, the digital value generated by a zero analogue signal. 2) For D/A conversion, the digital value that generates a zero analogue signal.
Industry:Automation
A programmable controller system configuration consisting of a primary and a backup (secondary) processor. If the primary processor fails, the backup processor takes over operations automatically.
Industry:Automation
In programming, a signal that is used to govern access to shared system resources. A semaphore is a flag variable — an indicator — that helps maintain order among processes that are competing for use of such critical resources as microprocessor time and communication ports. See also flag
Industry:Automation
Unwanted disturbances imposed upon a signal that tend to obscure its data content.
Industry:Automation
An I/O module that contains circuits that output an analogue dc signal proportional to a digital value transferred to the module from the processor. By implication, these analogue outputs are usually direct (i.e., a data table value directly controls the analogue signal value).
Industry:Automation
The process of breaking up a continuous variable into discrete quanta or parts.
Industry:Automation
