| Glossary |
| This glossary refers to subjects relating to |
Acknowledge | Acknowledgement returned by the receiving station after |
| having received a signal. |
Active metal component | Conductor or conductive component that is live when in |
| operation. |
Address | Number, for example, for identifying a memory location, a |
| system or a module within a network. |
Addressing | Assignment or setting of an address such as for a module in |
| a network. |
Analog | Value, such as voltage, that is infinitely variable and |
| proportional. Analog signals can acquire any value within |
| specific limits. |
Automation device | Control device with inputs and outputs that is connected to a |
| technical process. Programmable controllers (PLCs) are a |
| special group of automation devices. |
Baud | Unit for the data transfer rate. One baud corresponds to the |
| transmission of one bit per second (bit/s). |
Baud rate | Unit of measure of the data transmission speed in bit/s. |
Bidirectional | Operation in both directions. |
Bus | Bus cable system for data exchange between CPU, memory |
| and I/O level. A bus can consist of several parallel segments, |
| such as the data bus, address bus, control bus and power |
| supply bus. |
Bus cycle time | Time interval in which a master will serve all slaves or |
| stations in a bus system, i.e. writes their outputs and reads |
| their inputs. |
Bus line | Smallest unit connected to the bus. Consists of the PLC, a |
| module and a bus interface for the module. |
Bus system | The entirety of all units which communicate across a bus. |
MN05013001E | For more information visit: www.EatonElectrical.com | 193 |
