Introduction
This document contains actual examples of how Exaplog is used for process analysis. For an overview of the concepts and special features of Exaplog, refer to the separate “Exaplog Event Analysis Package Overview”, TI 36J06A10-01E. For specifications, see NTPS100 Exaplog Event Analysis Package GS 36J06A10-01E.
Exaplog Event Analysis Package Analytical Examples
TI 36J06A20-01E 1st Edition
CONTENTS
1. Simple Examples of Process Analysis using Exaplog.......................... 1-1
1.1 1.2 Analyze Process Requests. ............................................................................ 1-1 Analyze Operator Work. ................................................................................. 1-5
s TRADEMARKS • CENTUM is a registered trademark of Yokogawa Electric Corporation. • Exaplog is a trademark of Yokogawa Electric Corporation. • Windows NT is a registered trademark of Microsoft Corporation. • Ethernet is a registered trademark of XEROX Corporation. • Other company names and product names in this TI are registered trademarks or trademarks of respective companies.
TI 36J06A20-01E 1st Edition : Sep.01,1999-00
Blank Page
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-1
1.
Simple Examples of Process Analysis using Exaplog
This TI contains simple examples of the procedures for analyzing actual event data from a chemical plant.
1.1
Analyze Process Requests.
(1) The EBT graph (at the upper left) indicates process requests and operator work. Let’s analyze the time span between 15:00 and 18:00 where excessive process requests occurred. The Point ID Sort Window indicates that the tag “F2272PDI36” produced the most events in this time span.
F010101.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-2
F010102.EPS
(2) Display information on the tag “F2272PDI36” only. The Message Summary Window at the lower left indicates that HH, HI and NR frequently occurred at the tag.
F010103.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-3
(3) Let’s check if the tag produced alarms regularly or temporarily. The EBT graph indicates that the tag produced many alarms in the time span only. When checking the conditions of the previous day, you will see that no alarms occurred.
F010104.EPS
F010105.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-4
A flood of HI and HH alarms occurred from a differential pressure controller that controls a vent/vacuum filter, when materials that were different from ordinary ones were injected. The same furnace is used to produce various products in the chemical industry, so a flood of alarms occurs if alarm settings of pressure valves and others were not properly adjusted depending on materials. However, the operator ignored alarms because he/she knew that they often occur due to difference in materials. This implies that he/she may ignore important alarms. The Exaplog analysis allows you to eliminate the causes of problems on the EBT graph and continue to analyze unbalanced areas - to keep balance between process requests and operator work.
F010106.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-5
1.2
Analyze Operator Work.
(1) The EBT graph (at the upper left) indicates process requests and operator work. Let’s analyze the data around 6:00 where the operator conducted many operations. The Point ID Sort Window indicates that “MV” of the tag “R4500YIC58” produced the most events in this time span.
F010201.EPS
F010202.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-6
(2) Display information on the tag “R4500YIC58, MV”. The Message Summary Window at the lower left indicates that the operator manually opened and closed valves many times.
F010203.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-7
(3) Let’s check if the tag was manually manipulated at regular intervals during the day, or just once. The EBT graph indicates that it was manipulated at regular intervals. When checking the data on the previous day, you will see the operation was also conducted regularly.
F010204.EPS
F010205.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Toc>
<1. Simple Examples of Process Analysis using Exaplog>
1-8
The automation of the operation would reduce the operator’s work. The Exaplog Event Analysis Package helps you identify and reduce alarms/inefficient operation - and improve efficiency. The continuous analysis of process unbalances on the EBT graph allows you to optimize plant operation.
F010206.EPS
TI 36J06A20-01E
1st Edition : Sep.01,1999-00
<Int> <Toc>
i
Revision Information
q Title : Exaplog Event Analysis Package Analytical Examples q Manual No. : TI 36J06A20-01E Sep. 1999/1st Edition Newly published
Written by
Process Information System Center Industrial Automation Systems Business Div. Yokogawa Electric Corporation Published by Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, JAPAN Printed by Yokogawa Graphic Arts Co., Ltd.