Requirement for Alarm Management

- 1 -<ISD-MASP-S06017 Rev.2>Copyright © Yokogawa Electric Corporation<March 2011>

- 1 -

CAMS for HIS introduction of CENTUM VP

International Sales Promotion Gr.IA System Business Center

Yokogawa Electric Corporation


2

Requirement for Alarm Management

• The scope of work of each operator is becoming wider

• Operators tend to suffer from alarm flooding

– Unable to respond quickly

– Overlooks important alarms

– Alarm flooding may cause plant incidents

• Better and more efficient alarm management is mandatory for safer and more productive plant operation

– Alarm management requires the following points generally

• Adequate Alarm Design to generate alarms efficiently

• Well-managed Real-time Alarm view to reduce alarm flooding

• Alarm Analysis for process improvement

• Change of Management

– CAMS for HIS is the solution for well-managed Real-time Alarm view


3

Essence of CAMS for HIS

• The alarm dialog to – Deliver only the necessary alarms

to be handled• Only to the right person• At the right timing


4

CAMS for HIS features

Traditional Alarm list dialogs•System Alarm•Process Alarm•Ope-Guide Message•PRM’s Maintenance Alarm

all are shown in different dialogs

CAMS for HIS• Process alarms, System alarms, alarms from

the ProSafe-RS safety system and from the PRM Plant Asset Management system are covered

• A single operation is required to call up the related dialogs

• Functions to reduce the operators’ overload to avoid overlook of important alarms

• Filtering, Eclipsing, Suppression, Shelving


5

CAMS for HIS DialogClick blinking icons to open the CAMS View

The latest three alarms are always shown

Alarm list is shown here

Filter Pane– Based on the priority, consequence, tag, etc– Only the related alarm message for the operator can be

shown to reduce the workload.

Shelving Pane– Non-urgent alarms

can be shelved in temporary– Operators can concentrate

to the alarms which requires urgent actions


6

Support Quick Actions against the Alarms

• A single operation is required to call up the related dialogs

Context menu on the alarm message– Right-click on a alarm message to show the

context menu– It calls up that alarm related faceplate,

tuning view, trend graph or graphic by a single mouse click


Functions to Reduce Alarm Flooding

• Sorting– Sort alarms based on urgency or priority

(e.g. time of occurrence, allowed time for response, alarm priority, etc.)

• Filtering– Narrow down displayed messages using the identifiers

(e.g. user name, plant hierarchy title, purpose alarm priority, etc.)

• Eclipsing– Display the most important alarm from the same tag folded in a single line

• Shelving– Move low priority alarms to another folder for a certain period of time

(pre-defined by users) or by clock time.

• Load Shedding– Automatically activate predefined filtering

when unexpected alarm flooding occurs.


Filtering

• To avoid overlooking important alarms in the alarm flooding situation, the displayed alarms can be filtered based on various conditions– E.g. Alarm priority, Alarm purpose, Consequence, tag, etc

Filter Pane– Filters can be pre-configured

and can be configured by operators during the operation

– Alarms from ProSafe-RS, System alarms, and Process Alarm filters are prepared in default

Only the filtered alarms are displayed– Operators can consentrate to the related important

alarms which require urgent actons– Less opportunities to overlook the important alarms


Eclipsing

• To avoid overlooking important alarms in the alarm flooding situation, the displayed alarms can be grouped based on tag– Only the highest priority alarm for each tag is displayed– It can reduce the number of lines on the displayed list, so less

opportunities to overlook important alarms

Click to open/close the grouped alarm messages

Only a single line per tag


1

Shelving

• To put the alarms which do not require urgent action on a shelf to hide alarm messages for a while– Shelved alarms are not deleted– Important alarms can be prohibited to be shelved

Shelf Pane

Drag & Drop

The following types of shelving are applicable

One-shot• Separating unimportant

alarm to the shelf.

Continuous• Separating chattering

alarms.

Automatic• Separating unimportant

alarms based on preset logic.


Load Shedding

• The predefined filter is automatically applied when alarm flood happense.g.

When more than 100 alarms occur in 60 sec., high priority filter is automatically applied to show only the alarms that need immediate actions


Benefits for Plant Operators

• Direct the operator’s attention towards plant conditions and give more time to focus on processes.

– Less overwhelmed by nuisance alarms.– Relieve from tedious and repetitive tasks

• Alert, inform and guide operators so that operators can capture critical events.

• Present useful and relevant information.

• Reduce possibility of missing critical alarms, knowing human limitations

– Time to response.


Benefits for Plant Management

• Achieve and maintain safe and stable plant operations.

• Recognize and act to avoid hazardous situations due to alarm overload.

• Identify deviations that could lead financial loss, equipment, or environmental damage.

• A diagnostic tool to better understand the process conditions.

• Less dependant on operators’ skills or experiences.


“The simplest thing in the world.Anybody can do it, after he has been shown how !”

Christopher Columbus, c.1451 - 1506

Enjoy Safe Operation with a New Egg of Columbus !

Documents

Requirement for Alarm Management