Yokogawa Enhances Plant Safety with IEC 61511-compliant Safety Function Monitoring

By Shin Kai

Company and Product News

Yokogawa Electric Corporation announced a major upgrade to its Exaquantum Safety Function Monitoring (SFM) software, an OpreX Asset Operations and Optimization solution that helps identify whether actual operating performance meets safety design targets. SFM R3.35 provides continuous monitoring and evaluation of safety data to highlight deviations or failures in plant safety system performance.

Already in use across the globe in industries, such as oil and gas, SFM collects all safety-related data to track and analyze key performance metrics, including safety instrumented function (SIF) activations and maintenance (proof testing), independent protection layers (IPLs), and initiating causes and overrides. This new version now supports the International Electrotechnical Commission (IEC) 61511 standard and includes several new features to help SFM users identify potential safety issues, optimize maintenance activities, and improve overall safety solution design.

SFM R3.35 enables users to monitor the effectiveness of the performance of defined safety instrumented systems against their design targets.

Features of SFM R3.35 include as follows:

IEC 61511 compliant

  • SFM R3.35 employs a cause & effect matrix to quickly verify the logic of SIF activations and final element (valves, vents, actuators, etc.) actuations to see if they match their configured or intended safety design, as required by the IEC 61511 standard.

Enhanced proof testing

  • A proof testing status function has been added to SFM R3.35 for the monitoring of the expiration dates of proof tests on SIFs and final elements. Users can also claim proof test credit based on actual demand on the SIS during operation, with the functionality to record when proof tests have taken place and their expiry date to help maintain the validity of the safety system.

PHA-Pro compatibility

  • Safety configuration data for layers of protection analysis (LOPA) using PHA-Pro (a third-party software solution from Sphera) can be used to generate an initial SFM configuration file. A PHA-Pro export template exports information from the LOPA in a format that can be imported into SFM.

Major target markets include oil and gas production, oil and gas midstream, refining, petrochemicals, chemicals, and power generation in such applications as plant-wide monitoring, analysis and reporting of functional safety performance across safety instrumented systems (SIS) and final elements.



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