Industrial Communication Guide

Glossary

DIN 61508 International standard for the development of electrical, electronic and programmable electronic systems which perform a safety func- tion.

Control level Level of a production facility at which all control computers are to be found

Controller Controller consists of an open control chain without feedback

DIN 66025 Standard for CNC control programs

DCS Distributed Control System

DIN EN 61512 Standard for batch-oriented process control

Decentralized I/O station This station only exchanges individual bit data with the master. Suita- ble for connecting simple switches/a light barrier etc. Decentralized station This station can exchange various data with the master station. Sui- table as a bus component for measurement recording or interlinking of actuators (valves). Deterministic A communication system is deterministic if the duration and timing sequence of information transmission can be precisely predicted.

Electrical signal An electrical signal must be variable in terms of amperage, voltage or resistance in order for it to be able to transport information. In automation, a digital electrical signal is used where, for example, 0 V means “off” and 24 V means “on”. If the electrical signal indicates an “on”/”off” sequence over time, it can be used to convey any ma- chine-readable protocol. An analog electrical signal, which in automation can have any va- lue between 0 V and 24 V, contains sufficient information to set the speed of a motor, for example.

ERP Enterprise Resource Planning

Digital signal Has the two signal levels 0 and 1

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