IEC 62541-9 Ed. 4.0 en:2026

Full Description

IEC 62541-9:2026 part of IEC 62541 specifies the representation of Alarms and Conditions in the OPC Unified
Architecture. Included is the Information Model representation of Alarms and Conditions in the
OPC UA address space. Other aspects of alarm systems like alarm philosophy, life cycle, alarm
response times, alarm types and many other details are captured in standards such as
IEC 62682 and ISA 18.2. The Alarms and Conditions Information Model in this document, is
designed in accordance with IEC 62682 and ISA 18.2. Annex C specifies a recommended
mapping between OPC Classic Alarm Events (AE) servers to the model described in this
document.
Annex A describes recommended localized names for Alarm states.
Annex B describes examples (e.g. Event sequences, Alarm areas in AddressSpace).