1、 AMERICAN NATIONAL STANDARD ANSI/ISA-62382-2012 (IEC 62382 Modified) Automation Systems in the Process Industry Electrical and Instrumentation Loop Check Approved 5 June 2012 ANSI/ISA-62382-2012 (IEC 62382 Modified) Automation Systems in the Process Industry Electrical and Instrumentation Loop Check
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27、prepared by subcommittee 65E: Devices and integration in enterprise systems, of IEC technical committee 65: Industrial-process measurement, control and automation. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. The main ch
28、anges with respect to the previous edition are listed below: The definitions of the documents mentioned in the standards are in accordance with IEC 62708 “Documents for Electrical and Instrumentation Projects in the Process Industry”. Chapter 6.3 has been revised. The text of this standard is based
29、on the following documents: ANSI/ISA-62382-2012 (IEC 62382 Modified) - 10 - FDIS Report on voting 65E/386/FDIS 65E/395/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordan
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31、econfirmed, withdrawn, replaced by a revised edition, or amended. This publication contains attached files in the form of Excel files. These files are intended to be used as a complement and do not form an integral part of the standard. _ 1 The National Committees are requested to note that for this
32、 publication the stability date is 2016. - 11 - ANSI/ISA-62382-2012 (IEC 62382 Modified) INTRODUCTION The inspection and verification of the individual measurements and controls in conjunction with the control systems used to monitor these devices (DCS, PLC, etc.) is referred to as loop check. In in
33、dustry, numerous methods and philosophies are used to check the instrumentation and controls after mechanical installation within projects for modified or new facilities. This standard was created to provide a better understanding of what loop check consists of and also to provide a standard methodo
34、logy for executing a loop check. The annexes of this standard contain forms which may be used in the check procedures. Buyers of this publication may copy these forms for their own purposes only in the required amount. This page intentionally left blank. - 13 - ANSI/ISA-62382-2012 (IEC 62382 Modifie
35、d) AUTOMATION SYSTEMS IN THE PROCESS INDUSTRY- ELECTRICAL AND INSTRUMENTATION LOOP CHECK 1 Scope 1.1 General applicability This standard defines procedures and specifications for loop check, which comprises the activities between the completion of the loop construction (including installation and po
36、int-to-point checks) and the start-up of cold commissioning. This standard is applicable for the construction of new plants and for expansion/retrofits (i.e. revamping) of E the delivered instrumentation and associated equipment; and their installation. The main loop-related activities in the commis
37、sioning phase are loop tuning and verification of all other loop operations and control schemes. 5 Loop check content 5.1 Included activities The loop check includes the following elements of a “loop“: Hardware components: check of functionality and interoperability of: o All loop components, locate
38、d in the field, control room, or other rooms (e.g. rack room), their configuration and their interconnection o Input and output cards of the control system o Connections of the loop to other systems Software check the configuration and functionality of: IEC 2057/06 ANSI/ISA-62382-2012 (IEC 62382 Mod
39、ified) - 18 - o Faceplate and graphics o Alarms o Control (control algorithm, direct/reverse setting, advanced control scheme) o Interlocking The loop check uses the basic graphics/faceplates of the control system (see Figure 2). Note that inputs and outputs may be connected not only to the BPCS but
40、 also to the SIS or other subsystems. They all are monitored and displayed to the operator on the BPCS 5.1.1 The actual loop check involves the three following phases (see details in chapter 6): a) Documentation check Check for the completeness and consistency of loop documents, including any docume
41、nts from the installation or FAT b) Installation check Visual inspection of loop devices for correct installation and tagging c) Functional check All loop components (hardware and software) are checked for proper configuration and operation 1) Check of the operational configuration is completed duri
42、ng cold commissioning or hot commissioning. Figure 2 Loop components 5.1.2 During the loop check, the following three types of deficiencies can be found: a) Installation failures IEC 2058/06 - 19 - ANSI/ISA-62382-2012 (IEC 62382 Modified) Discrepancies with the specified hardware or the installation
43、 (incorrect installation, incorrect instruments, etc.). The construction contractor should resolve these problems. b) Configuration failures Discrepancies between the software configuration and the software functional specification. The entity responsible for the control system programming should re
44、solve these problems. c) Engineering failures Discrepancies to be suspected when, despite installation of the designated instruments in accordance with the applicable drawings, the desired functionality cannot be realized (for example, due to an incorrect drawing, specification, etc.) The entity res
45、ponsible for the engineering on the project should resolve these problems. Additional deficiencies might be in the process design, but this can only be determined after process start-up. 5.2 Activities excluded The loop check does not include: Test activities possible without construction being comp
46、leted: o Software testing using simulation tools o Other factory acceptance tests performed at the contractor or vendors factories Other software checkout activities (FAT, etc.) Detailed construction and mechanical inspections performed during the construction phase: o Cable testing during construct
47、ion (Hipot, Meggering et al.); o Point-to-point wiring checks; Testing of the internal workings of package units (i.e. process subunits, machinery, complex analyzers, etc.) is excluded. Only the I/O testing of this equipment is included in the loop check; Validation of Safety Instrumented Systems Ac
48、tivities belonging to the commissioning phase: tuning of loops, instruments and control schemes (for example, calibrating of level transmitters by filling tanks; verification of complex control schemes; tuning of continuous control schemes; etc.). 6 Loop check procedure 6.1 Loop check planning Loop
49、check planning begins with a complete list of all loops to be checked. These may be newly installed loops or existing loops that are being modified. The test(s) to be performed on each loop and the acceptance criteria must then be established. Annex A provides some examples of loop tests that may assist the user in developing a specific loop test plan for the loops on the project. All associated documentation for the loops to be checked should be assembled. This may include: Instrument index providing pertinent information for all in
