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Plant Historian AR

Alarm Rationalization for increased Plant Security

Plant Historian AR - Alarm Rationalization

Increased Plant Security as a result of sustainable Alarm Management


Alarm rationalization should be an integral part of a sustainable alarm management system.

The distinction between important and unimportant messages and their weighting are essential.

An inaccurate prioritization means a high workload for the operator in the control center. Alarms with wrong priority could have significant negative consequences:

  • Too many alarms with a high priority lead to higher workload.
  • Important alarms with too low priority may be dangerous for plant security.

Plant Historian AR - Alarm Rationalization - allows to determinate alarm priorities according to an individually created concept, alarm reasons are documented, procedural instructions and recommendations are included.

With the help of an intuitive decision tree, actual alarm priority is determined. A change of an alarm priority will automatically start the MOC process. When the MOC process is finished (confirmation of the changes according to the dual-control principle) the changes can be implemented into the control technology. Subsequently, Plant Historian AR will check the correct execution of the priority change.

Prioritization prevents the ignorance of critical messages (desensitization of operators).

Combined with Plant Historian AM (Alarm Management), Plant Historian AR (Alarm Rationalization) represents an essential part of systematic alarm management.


Alarm rationalization, sustainable alarm management
Plant Historian AR - Alarm Rationalization - increased plant security due to sustainable alarm management

Safety and security for man, machine and environment


  • Increased plant security due to sustainbale, systematic alarm management
    (awareness for a systematic alarm management philosophy, support in alarm situations etc.)
  • Automatic comparison between the alarm priorities determined by the alarm rationaliziation and the actual alarm priorities of the process control system
  • Support for alarm reduction
  • Workload reduction for the personnel because of procedural instructions and recommendations

Core Features

  • Intuitive classification of alarms
  • Basis for the Management of Change process (MOC)
  • Validation of rationalization measure (comparision of planned and actual data)
  • Documentation of rationalization data
  • Automatic generation of alarm master data


  • Company-wide, central solution, no client installation necessary
  • Multiuser and multi-project capabilities, scalability, multilingualism and independence from the process control system
  • Standardized interfaces to the PCS / SPS world
  • OPC connection to any process control system / control, e.g.:
    • Siemens: Simatic PCS7, S7, WinCC, Teleperm M
    • Emerson: Delta V
    • Honeywell: Experion, FSC102
    • ABB: Freelance, 800xA, Advant Master, Symphony Maestro UX,Contronic P, Contronic E, Operate IT
    • Foxboro: I/A Series
    • HIMA HiMax
    • Invensys Triconex