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Library manual M238 system functions | 2 MB - BERGER - POSITEC

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Modbus<br />

NEMA<br />

PLC<br />

PLI<br />

POU<br />

PTO<br />

M<br />

The Modbus communication protocol allows communications between many<br />

devices connected to the same network.<br />

N<br />

Glossary<br />

The National Electrical Manufacturers Association publishes standards for the<br />

performance of various classes of electrical enclosures. The NEMA standards cover<br />

corrosion resistance, ability to protect from rain and submersion, etc. For IEC<br />

member countries, the IEC 60529 standard classifies the ingress protection rating<br />

for enclosures.<br />

P<br />

The Programmable Logic Controller is the “brain” of an industrial manufacturing<br />

process. It automates a process, used instead of relay control <strong>system</strong>s. PLCs are<br />

computers suited to survive the harsh conditions of the industrial environment.<br />

Pulse Latch Input<br />

A Program Organization Unit includes a variable declaration in source code and the<br />

corresponding instruction set. POUs facilitate the modular reuse of software<br />

programs, <strong>functions</strong>, and function blocks. Once declared, POUs are available to one<br />

another. SoMachine programming requires the utilization of POUs.<br />

Pulse Train Outputs are used to control for instance stepper motors in open loop.<br />

EIO0000000364 04/2012 85

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