Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Bedienungsanleitung PDF herunterladen (Seite 195)

Glossary-8

Logic General term for digital circuits and programmed instructions to perform required

decision-making and computational functions.

M 1. Mega. A prefix used with units of measurement to designate a multiple of

1,000,000.

2. 1M = 2

= 1,048,576. A prefix used as a multiple for bits, bytes, or words in

denoting size of a block of data or memory. Example: 2M bytes = 2,097,152

bytes.

Megger Test A test used to measure an insulation system’s resistance. This is usually measured

in megohms and tested by passing a high voltage at low current through the moto

windings and measuring the resistance of the various insulation systems.

Menu A list of options, on a screen, from which a user can select.

Message 1. A meaningful combination of alphanumeric characters that establishes th

content and format of a report.

2. In a communication network, the unit of exchange at the application layer.

Microprocessor A central processing unit that is manufactured on a single integrated circuit (or on

only a few integrated circuits) by utilizing large scale integration technology.

Mode A selected method of operation. Example: run, test, or program.

Module An interchangeable plug-in item within a larger (modular) assembly.

Motor • AC Motor – is a device that converts (single or multiple phase) alternating

electrical current into mechanical energy. It requires no commutation devices

such as brushes.

• DC Brushless Moto – is a type of DC motor that uses electronic commutation

rather than brushes (as standard) to transfer current.

• DC Motor – is a device that converts direct electrical current into mechanical

energy. It requires a commutation device, either brushes or electronic.

• DC Permanent Magnet Motor – is a type of DC motor that uses permanent

magnets to produce a magnetic field. It has linear torque-speed characteristics.

• Stepper Motor – is a specialized DC motor that allows discrete positioning

without feedback.

Motor Controller, A device or group of devices that serve to govern, in a predetermined manner, the

Motor Starter electrical power delivered to a motor.

Multispeed Motor An induction motor that can obtain two, three or four discrete (fixed) speeds by th

selection of various stator winding configurations.

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Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Bedienungsanleitung Seite 195