9 Appendix
9.3 Glossary
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Check-back interface
The check-back interface is the interface from the counter module to the internal module bus. The bits
and bytes are converted by the gateway from the respective type of communication applicable to the
fieldbus in to the module-specific bits and bytes.
Coding elements
Two-piece element for the unambiguous assignment of electronic and base modules.
Configuration
Systematic arrangement of the I/O-modules of a station.
Control interface
The control interface is the interface from the internal module bus to the counter module. The
commands and signals directed to the counter module are converted by the gateway from the respective
type of communication applicable to the fieldbus in to the module-specific bits and bytes.
CPU
Central Processing Unit. Central unit for electronic data processing, the processing core of the PC.
DHCP
Client-Server-protocol which reduces the effort of assigning IP addresses or other parameters. Serves
for dynamic and automatic configuration of devices.
Digital
A value (e. g. a voltage) which can adopt only certain statuses within a finite set, mostly defined as 0 and
1.
DIN
German acronym for German Industrial Standard.
EIA
Electronic Industries Association – association of electrical companies in the United States.
Electrical components
All objects that produce, convert, transmit, distribute or utilize electrical power (e. g. conductors, cable,
machines, control devices).
EMC
Electromagnetic compatibility – the ability of an electrical part to operate in a specific environment
without fault and without exerting a negative influence on its environment.
EN
German acronym for European Standard.
ESD
Electrostatic Discharge.
Field power supply
Voltage supply for devices in the field as well as the signal voltage.
Fieldbus
Data network on sensor/actuator level. A fieldbus connects the equipment on the field level. Character-
istics of a fieldbus are a high transmission security and real-time behavior.
Force Mode
Software mode which enables the user to set his plant to a required state by forcing certain variables on
the input and output modules.
