What is the root cause of this plant upset? Is instant online analysis available?


  • "SOE of Control system or alarm logger lists the sequence of events, but does not help identifying the Root Cause”We need to check with other process parameters as well to conclude.
  • “Process alarms & parameters alone may not be enough. Many times we need to use our experience in determining Root Cause. We have set up an investigation committee it may even take weeks”.
  • SAMA RCA is solution to the above issues raised frequently in Process Industries, Power plants as well as Building automation.
  • SAMA RCA is online software with instant Root Cause analysis solution. Root Cause Analysis (RCA) package gives instant Root Cause of not only a shutdown, but also of an upset condition.

RCA Overview Display


RCA over view display lists all possible upsets ot trip conditions or Decision Tree names and their status. If an upset condition results, then status will turn red. From here, user can go to Root cause view to view the Root Cause; even if it is green user may to go Normal view to see the current status of the plant and may take immediate steps to prevent an upset.

Root Cause Identification


Decision Tree mechanism based on Result Tag (trip or upset), Condition tags and Cause tags as well as statistical calculations. Statistical calculations supplement Decision Tree, especially in cases such as:

- Cause tag or condition tag sensor fails

- More than one Cause tag

- Hidden causes, hardware failure Hence use the most probable root cause:


More Probable Root Cause

If auto mode is chosen, auto relevance calculated (self‐ learnt automatically or exploratory) is used to calculate adjusted probability.



Root Cause Display

In Manual mode, Relevance and weightage (based on your experience) for each cause tag can be assigned upfront. Based on these, it self learns and calculates adjusted probability.


Note that both Root Cause path and Root Cause are highlighted.


Probability over Feedback status: Root cause is identified based on Probability. When probability is equal among the condition satisfying causes, Root Cause determined based on feedback status among the multiple causes.


Feedback status over Probability: Root cause is identified based on the actual feedback. If no feedback cause is found or when multiple causes based on feedback is available, then the cause with highest probability, but satisfying conditions is highlighted as root cause.


User can also select the root cause manually. Operator can log his observation regarding the generated alarms. This log can be used later to tune the software. In addition to instant RCA, Historical Root Causes can be selected and viewed as they are stored. Report generation facility for alarm analysis includes Decision Tree Reports, Daily Analysis Reports, Alarm Analysis Results, Alarm Summary and Transverse information is provided.


Date source

AE source: OPC AE. DA source: OPC DA. Other Data sources via ASCII capture via Ethernet, ODBC, serial etc.

Compatibility

Microsoft Windows 2016 / 2012 server, Windows 7, Windows 10 Pro Ordering information: Number of Trees 50,100,250, more than 250; Number of RCA clients


Related Prducts


Performance Monitoring


SAMA Real Time Historian features include multiple OPC, ODBC sources, large tag capacity & Database. Supports multiple concurrent users. Calculations required for production reports – Max, Min, Ave, Totalizer, sum, statistical, Deviation, ROC; incremental values are provided as standard feature. Seamlessly connects to RT viewer, web server as well as other applications. Watch your production and performance live, wherever you are.

Alarm Server, Analysis, Dynamic alarms

Alarm Server, Analysis, Dynamic alarms Connects to multiple sources - OPC, ODBC, SNMP, capture prints & graphics. Analysis with dynamic charts as required by EEUMA & ISA standards for Priority Distribution, Standing alarms, stale alarms, unacknowledged alarms, frequency, time-in-alarm & between alarms, alarm sequence display, chattering alarms and symptomatic alarms. Rationalization module provides tools for Alarm Rationalization including priority derivations. Operator Assist helps user with interactive context sensitive help upon arrival of an alarm. Dynamic Alarm management involves automatic changing of Alarm set points, tuning parameters; enabling or disabling alarms based on plant conditions such as change in feed mix or product pattern or throughput changes or equipment status.

Advanced calculations & Optimizer

SAMA Optimiser works with real time as well as historical values independently from OPC or SAMA Historians. It is easily configurable. No limits on number of calculations or pages. Enter as an expression and see the calc blocks interconnected. Multiple functions including matrix as well as standard calculation library are provided. Example of use may be economic generation scheduling to meet a particular load demand.