Interface to the pi system Version 37 and Greater
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Interface to the PI System How to Contact Us
Unpublished -- rights reserved under the copyright laws of the United States. RESTRICTED RIGHTS LEGEND Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 Trademark statement—PI is a registered trademark of OSI Software, Inc. Microsoft Windows, Microsoft Windows for Workgroups, and Microsoft NT are registered trademarks of Microsoft Corporation. Solaris is a registered trademark of Sun Microsystems. HP UX is a registered trademark of Hewlett Packard Corp. IBM AIX RS/6000 is a registered trademark of the IBM Corporation. DUX, DEC VAX and DEC Alpha are registered trademarks of the Digital Equipment Corporation. 1997 OSI Software, Inc. All rights reserved 777 Davis Street, Suite 250, San Leandro, CA 94577 Table of ContentsHow to Contact Us ii Table of Contents iii Introduction 1 Communication Configuration 2 Yokogawa Gateway Setup Diagram 2 Hardware Configuration 2 Micro XL Ethernet Requirements 3 Outline of Operation 5 Input Tags 5 Output Tags 5 Tag Attributes Update 6 Event Counter Tags 6 Logging File 6 Error Handling 7 PI System Databases 9 Point Source (PI2 only) 9 Digital States 9 Tag Definition 11 Interface Files 15 Interface Program File 15 Interface Startup File 15 Interrupt Messages Switch File 22 Data I/O Type Filter File 22 Digital State String Translation File 23 Communication Testing Programs 23 Pre-Installation Checklist 25 VMS Installation 26 Basic Installation 26 Permanent Installation 27 Windows NT Installation 29 Basic Installation 29 Permanent Installation 29 Appendix — Error Messages 31 Revision History 34 IntroductionThe Yokogawa YGW interface provides communication between PI and Yokogawa CGWU, EGCW3 and ECGW* gateways and the Micro XL DCS. It is an OSI Software standard Universal Interface (Uniint). Note: All mention of the above four Yokogawa systems will be referred to, hereafter in this manual, as “the gateway”. If, however, information in this manual refers to a specific gateway, the actual gateway name will be used. Data is transferred between the gateway and the interface via RS-232 Serial TTY communication or TC/PIP socket calls. Data is transferred between the interface and PI via the PI API. The PI API is necessary for the interface to run and is not included with the interface. The minimum requirements for the interface are given in the following table:
The interface supports input tags (from Yokogawa to PI) and output tags (from PI to Yokogawa). It counts the events to and from these tags, including exception tests, and sends its totals periodically to PI. Data from the gateway is received at cyclic frequencies or by exception in the data. The frequency of the cycles is configured by the user and controlled by the interface. The number of tags that the interface is capable of servicing is unlimited. Changes that are made to the PI point database are reflected in the interface. This includes the adding, editing and deleting of tags. All error information and some summary information are output to a log file. The amount of summary information that is output is configurable by the user and is minimal by default. For information about configuring information messages, see the “/db”, “/lg” and “/cl” headings of the Interface Startup File section on page 15. A summary of the features of the interface is shown in the following table:
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