1.5 Definitions, expressions, abbreviations
1oo2 One-out-of-Two safety architecture, which means that it includes two channels connected
in parallel, such that either channel can process the safety function.
AC500-S ABB Safety PLC for applications up to SIL3 (IEC 61508 ed. 2 and IEC 62061) and PL e
(ISO 13849)
AC500-S-XC ABB Safety PLC for applications up to SIL3 (IEC 61508 ed. 2 and IEC 62061) and PL e
(ISO 13849) suitable for Extreme Environmental Conditions
ADC Analog to Digital Converter
CCF Common Cause Failure
CPU Central Processing Unit
CRC Cyclic redundancy check. A number derived from and stored or transmitted with a block
of data in order to detect data corruption.
DC Diagnostic Coverage
DPRAM Dual-ported Random Access Memory
IEC International Electro-technical Commission Standard
EDM External device monitoring signal, which reflects the state transition of an actuator
EMC Electromagnetic Compatibility
EN European Norm (European Standard)
EPROM Erasable Programmable Read-only Memory
ESD Electro Static Discharge
ESPE Electro-sensitive protective equipment (for example a light curtain)
F-Host Data processing unit that is able to perform a special protocol and to service the "black
channel" [3]
F-Device Passive communication peer that is able to perform the special protocol, usually triggered
by the F-Host for data exchange [3]
F-Parameter Fail-safe parameter as defined in [3]
FB Function Block
FBD Function Block Diagram (IEC 61131 Programming Language)
Flash memory Non-volatile computer storage chip that can be electrically erased and reprogrammed
GSDML Generic Station Description Markup Language
IO controller Controller that controls the automation task in PROFINET context
IO device Field device, monitored and controlled by an IO controller in PROFINET context
iParameter Individual safety device parameter
LAD Ladder Logic Diagram (IEC 61131 Programming Language)
Loop-back The programmable routing feature of a bus device re-routes unintentially an F-Host mes-
sage back to the F-Host, which expects a message of the same length (see www.profi-
safe.net for further details).
Introduction
Definitions, expressions, abbreviations
30.03.2017 AC500-S 11
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