Definitions and abbreviations133Warning Signal caused by an existing alarm which does not leadto tripping of the devicePROFIBUS abbreviationsThe text in italics is the original German term..con Confirmation.ind Indication.req Request.res ResponseACT Actual ValueIstwertAK Request Label/Response LabelAuftragskennung/AntwortkennungALI Application Layer InterfaceCR Communication ReferenceKommunikationsreferenz (Kommunikationsbeziehung)DP Decentralised PeripheryDezentrale PeripherieDP-ALI Application Layer Interface for DPDP-V1 PROFIBUS DP Extensions to the EN 50170 standard,including e.g. acyclic data exchangeFDL Fieldbus Data LinkFMS Fieldbus Message SpecificationFSU Manufacturer Specific InterfaceFirmenspezifischer UmsetzerHIW Main Actual ValueHauptistwertHSW Main ReferenceHauptsollwert
