| Term | Definition |
|---|---|
| HTML |
Hyper text markup language |
| Hypertext |
An interactive on-line documentation technique that allows users to
select ?? typically via a mouse click ?? certain words or
phrases to immediately link to information related to the selected item. |
| Hysteresis |
1) The effect of residual magnetism whereby the magnetization of a ferrous substance lags the magnetizing force because of molecular friction. 2) The property of magnetic material that causes the magnetic induction for a given magnetizing force to depend upon the previous conditions of magnetization. 3) A form of nonlinearity in which the response of a circuit to a particular set of input conditions depends not only on the instantaneous values of those conditions, but also on the immediate past of the input and output signals. |
| I/O |
Stands for "Input/Output," in automation, a term encompassing all physical connection points between a control system and the sensors and actuators of the "real world." |
| IGES |
Initial Graphics Exchange Specification. IGES is an industry standard format for exchanging CAD data between systems. |
| Image processing |
Techniques for filtering, storing, and retrieving images, as well as for processing pictorial information by computer. |
| Index |
An object implemented by some relational database software that controls the order in which a table is accessed or stored. |
| Indexer |
An electronic unit that converts high-level commands from a host computer, PLC, or operator panel into step and direction pulses needed by a stepping motor driver. |
| Indicator |
An identified measure of a process. |
| Information System |
The information system manages the scope, validity, reliability, selection and maintenance of quality and performance data and information. The system also provides comparative information and benchmarks. The data and information is then used to monitor and improve the integrated systems. |
| Input signal |
A signal applied to a device, element, or system. |
| Instrument |
the term for any item of electrical or electronic equipment designed to carry out a specific function or set of functions. A device for measuring the value of an observable attribute. The instrument may also control the value. |
| Instrumentation |
systems of instruments used to observe and control a physical object or process. |
| Integrated circuit |
A small, complete circuit of interconnected semiconductor devices such as transistors, capacitors, and resistors printed in a single silicon chip. |
| Interface |
a shared boundary between two pieces of equipment. Hardware and associated software needed to enable one device to communicate with another. |