SCADA and Alarm Management - DCE FEL ČVUT v Praze

• Provide information about how the alarm
system is configured.
– Number of alarms installed
– How many alarms per priority, region, type, node
– Total alarms from instruments
– Alarms from the control system (generated)
• These are generally good statistics to compare
with the Analysis resulting from the actual
events which are supposed to yield
understandable results.
• Eg. If the system produces large amount of
high priority alarms, the configuration analysis
can reveal the percentage of high priority
alarms installed. This in turn can uncover if the
system is dangerously operated or simply
wrongly configured.
Configuration Analysis
Approach to use Analysis results with life cycle
If the Alarms system is new it is recommended to follow
the life cycle approach proposed by the ISA 18.02
standard
On existing systems two different approaches may be
used to properly utilize Alarm Analysis Results
a) Short term (Sanity Actions)
a) Most Frequent Alarms root cause Analysis
b) Chattering Alarms Elimination
c) Standing points review and redesign. (possible
suppression).
d) Review alarm correlations and implement
possible corrections to abnormal issues.
b) Long Term
a) Update or Create an Alarm philosophy
b) Reevaluate and Rationalize all the alarms for
effectiveness and risks (priorities)
c) Design and implement changes identified gaps
identified in the philosophy and rationalization
steps.
d) Fully establish the Monitoring, Change
Management and Auditing Procedures to ensure
proper management
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