Safety Considerations Guide for Triconex General ... - ICEWeb
Safety Considerations Guide for Triconex General ... - ICEWeb
Safety Considerations Guide for Triconex General ... - ICEWeb
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HART Position Paper from TÜV Rheinland 77<br />
2008-04-01<br />
To avoid failures resulting from unintended configuration changes of the HART capable field<br />
devices, protection mechanisms, which may be provided by the HART devices, shall be<br />
used.<br />
The data (Secondary variables, device in<strong>for</strong>mation, diagnostics, and status data) received<br />
from the HART device must not be used <strong>for</strong> safety related reactions in the SIS.<br />
The data received from the HART devices could be used in control, diagnostics, or asset<br />
management systems <strong>for</strong> device diagnostics and maintenance purposes. The Asset<br />
Management, Diagnostics, maintenance systems and operating procedures is to act as an<br />
independent layer of protection; in this case the role of asset management is to identify a<br />
potential failure on a field element (i.e. valve) that might prevent the safety function to act if<br />
demanded.<br />
As a part of management of safety policy, practices and procedures, the AMS (HART<br />
master) must be password protected to allow maintenance of and modifications to the HART<br />
enabled field devices connected to SIS by authorized people only. The <strong>Safety</strong> procedure<br />
should include provisions to avoid re-configuration of HART enabled field devices by<br />
mistake.<br />
Online changes to the field device configuration, online calibration and online maintenance<br />
shall be avoided and must be evaluated depending on the application.<br />
<strong>Safety</strong> procedures must be established to ensure proper use of the AMS or hand-held<br />
communicator <strong>for</strong> configuration changes, calibration or maintenance of HART enabled field<br />
devices connected to SIS. Any change to the HART enable field device must be followed by<br />
verification to prove the correct implementation.<br />
5. Summary<br />
Following the rules and guidelines as listed in chapter 4. the HART communication can be used<br />
within safety related applications using <strong>Safety</strong> Instrumented Systems (SIS).<br />
Besides, the available safety- and user guidelines of the SIS and HART devices shall be<br />
considered <strong>for</strong> further in<strong>for</strong>mation and restrictions.<br />
HART_in_<strong>Safety</strong>_Related_Applications_pdf.doc<br />
Revision 1.0 Page 7 of 7<br />
<strong>Safety</strong> <strong>Considerations</strong> <strong>Guide</strong> <strong>for</strong> <strong>Triconex</strong> <strong>General</strong> Purpose v2 Systems