Show simple item record

Graphic Symbols for Distributed Control/Shared Display Instrumentation, Logic and Computer Systems

contributor authorISA - International Society of Automation
date accessioned2017-09-04T17:16:37Z
date available2017-09-04T17:16:37Z
date copyright01/01/1983
date issued1983
identifier otherZGGNCAAAAAAAAAAA.pdf
identifier urihttps://yse.yabesh.ir/std/handle/yse/140027
description abstractThis standard satisfies the requirements for symbolically representing the functions of distributed ControVshared display instrumentation, logic, and computer systems. The instrumentation is generally composed of field hardware communication networks and control room operator devices. This standard is applicable to all industries using process control and instrumentation systems.
No effort will be made on the flow diagram to explain the internal construction, configuration, or method of operation of this type of instrumentation, logic and computer systems. Personnel needing to understand flow diagrams must have a basic understanding of the total system in order to correctly interpret the diagram. The type of computation or the use of the process variable within a program is not indicated except in those cases where the process variable is an integral part of the control strategy. In applications where all instrument system data base information is available to the computer via the communication link, the depiction of the computer interconnections is optional in order to conserve space on flow diagrams.
Application to work activities
This standard is intended for use whenever any reference to an instrument is required. Such references may be required for the following uses as well as others:
Flow diagrams, process and mechanical;
Instrumentation system diagrams;
Specifications, purchase orders, manifests, and other lists;
Construction drawings;
Technical papers, literature, and discussions;
Tagging of instruments; and
Installation, operation, and maintenance instructions, drawings, and records.
Relationship to other ISA standards
This standard complements ISA-S5.1, "Instrumentation Symbols and Identification," for symbols and formats representing functional identification codes. For clarification of examples, a limited amount of ISA-S5.1 symbology has been included in this document.
Relationship to other standards
Where applicable, definitions not included in Section 3 are in accordance with ANSI X3/TR-1-77, "American National Dictionary for Information Processing," and/or ISA-S5.1.
Purpose
The purpose of this standard is to establish documentation for that class of instrumentation consisting of computers, programmable controllers, minicomputers and micro-processor based systems that have shared control, shared display or other interface features. Symbols are provided for interfacing field instrumentation, control room instrumentation and other hardware to the above. Terminology is defined in the broadest generic form to describe the various categories of these devices.
It is not the intent of this standard to mandate the use of each type symbol for each occurrence of a generic device within the overall control system. Such usage could result in undue complexity in the case of a Piping and Instrument Drawing (P&ID). If, for example, a computer component is an integral part of a distributed control system, the use of the computer symbol would normally be an undesirable redundancy. If, however, a separate general purpose computer is interfaced with the system, the inclusion of the computer symbol may provide the degree of clarity needed for control system understanding.
This standard attempts to provide the users with defined symbolism and rules for usage, which may be applied as needed to provide sufficient clarity of intent. The extent to which these symbols are applied to various types of drawings remains with the users. The symbols may be as simple or complex as needed to define the process.
languageEnglish
titleISA 5.3num
titleGraphic Symbols for Distributed Control/Shared Display Instrumentation, Logic and Computer Systemsen
typestandard
page22
statusActive
treeISA - International Society of Automation:;1983
contenttypefulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record