Important Notices and Disclaimers

Contribution to the IEC. This book is provided to the International Electrotechnical Commission (IEC) to support the development of a standard. Yahya Nazer is the team leader for the development of this standard.

Educational material, not a standard. This book is an independent educational explanation of procedure automation for continuous process operations. It is not the IEC-TBD standard and does not replace it. Where this book and the published standard differ, the published standard governs.

No warranty. The information is provided “as is”. The author and CTRL Designer LLC make no warranty that it is complete, current or fit for any particular purpose, and accept no liability for loss or damage resulting from its use.

Safety. Procedure automation affects the safe operation of process plants. Every application must be reviewed by competent engineers against the applicable codes, the site safety management system and the published standard. Safety Instrumented Functions are outside the scope of this book.

Requirement wording. In this book, shall marks a requirement taken from the standard, should marks a recommendation, and may marks a permitted option. Notes and Industrial Examples are informative.