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Programming manual M238 | 3 MB - BERGER - POSITEC

Programming manual M238 | 3 MB - BERGER - POSITEC

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controller<br />

cyclic task<br />

data log<br />

DHCP<br />

EEPROM<br />

EIA rack<br />

EtherNet/IP<br />

Glossary<br />

A controller (or “programmable logic controller,” or “programmable controller”) is<br />

used to automate industrial processes.<br />

The cyclic scan time has a fixed duration (interval) specified by the user. If the<br />

current scan time is shorter than the cyclic scan time, the controller waits until the<br />

cyclic scan time has elapsed before starting a new scan.<br />

D<br />

The controller logs events relative to the user application in a data log.<br />

The dynamic host configuration protocol is an advanced extension of BOOTP.<br />

DHCP is a more advanced, but both DHCP and BOOTP are common. (DHCP can<br />

handle BOOTP client requests.)<br />

E<br />

Electrically erasable programmable read-only memory is a type of non-volatile<br />

memory used to store data that must be saved when power is removed.<br />

An electronic industries alliance rack is a standardized (EIA 310-D, IEC 60297 and<br />

DIN 41494 SC48D) system for mounting various electronic modules in a stack or<br />

rack that is 19 inches (482.6 mm) wide.<br />

The ethernet industrial protocol is an open communications protocol for<br />

manufacturing automation solutions in industrial systems. EtherNet/IP is in a family<br />

of networks that implements Common Industrial Protocol at its upper layers. The<br />

supporting organization (ODVA) specifies EtherNet/IP to accomplish global<br />

adaptability and media independence.<br />

EIO0000000384 04/2012 245

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