Automation systems in the process industry - Factory acceptance test (FAT), site acceptance test (SAT), and site integration test (SIT)

IEC 62381:2012 defines the procedures and specifications for the Factory Acceptance Test (FAT), the Site Acceptance Test (SAT), and the Site Integration Test (SIT). These tests are carried out to prove that the automation system is in accordance with the specification. The description of activities given in this standard can be taken as a guideline and adapted to the specific requirements of the process, plant or equipment. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. The main changes with respect to the previous edition are: The definition of the documents mentioned in this standard is in accordance with future IEC 62708.

Systèmes d'automatisation pour les procédés industriels - Essais d'acceptation en usine (FAT), essais d'acceptation sur site (SAT) et essais d'intégration sur site (SIT)

LA CEI 6238:2012 définit les procédures et spécifications des essais d'acceptation en usine (FAT), des essais d'acceptation sur site (SAT) et des essais d'intégration sur site (SIT). Ces essais sont réalisés pour démontrer la conformité du système d'automatisation à la spécification. La description des activités détaillées dans la présente norme peut être considérée comme une ligne directrice et être adaptée aux exigences spécifiques du processus, de l'usine ou de l'équipement. Cette deuxième édition annule et remplace la première édition parue en 2006. Elle constitue une révision technique. Les principales modifications par rapport à l'édition précédente sont: La définition des documents mentionnés dans la présente norme est conforme à la future CEI 62708.

General Information

Status
Published
Publication Date
21-Feb-2012
Current Stage
DELPUB - Deleted Publication
Start Date
30-Jul-2024
Completion Date
18-Jun-2021
Ref Project

Relations

Overview

IEC 62381:2012 is an international standard developed by the International Electrotechnical Commission (IEC) that provides comprehensive guidelines for testing automation systems in the process industry. Specifically, it defines the procedures and specifications for three critical types of tests:

  • Factory Acceptance Test (FAT)
  • Site Acceptance Test (SAT)
  • Site Integration Test (SIT)

These acceptance tests ensure that automation systems meet required specifications before and after installation. The standard supports process industries in validating automation system functionality and performance, reducing risk and ensuring smooth project execution.

This second edition of IEC 62381 supersedes the first edition published in 2006, including technical revisions aligned with IEC 62708 for documentation definitions. It aims to improve clarity, accelerate negotiation phases between vendors, contractors, and owners, and supports adaptation to specific plant or equipment requirements.

Key Topics

IEC 62381 covers a range of essential topics critical to effective acceptance testing of automation systems:

  • Test Definitions and Scopes: Clear definitions of FAT, SAT, and SIT including their roles in project milestones. FAT assesses the system at the vendor’s facility, SAT evaluates installation in the field, and SIT confirms integration with other systems on site.
  • Documentation Requirements: Guidance on preparation of document sets by owners, vendors, and contractors to support testing activities.
  • Test Planning and Procedures:
    • FAT emphasizes test set-up, conducting tests, application checks, and rework processes.
    • SAT and SIT focus on validating installed systems and integration with plant control levels.
  • Certificates and Reports: Standardized formats for FAT, SAT, SIT certificates and test reports ensure traceability and formal acceptance.
  • Punch Lists and Checklists: Inclusive annexes provide templates for punch lists and checklists used during testing to track outstanding issues and compliance systematically.
  • Integration Levels: The standard illustrates relationships between acceptance tests and plant automation levels including Distributed Control Systems (DCS), subsystems, and field devices.

Applications

IEC 62381 is widely applicable to process industries aiming to implement or upgrade automation systems including:

  • Chemical and Petrochemical Plants: Ensuring automation systems meet stringent safety, reliability, and performance standards.
  • Pharmaceutical Manufacturing: When combined with other guidelines like GAMP and GMP compliance, the standard aids in validation of automated production processes.
  • Oil and Gas: Supports testing of complex control systems integrated with fieldbus and advanced field instrumentation.
  • Food and Beverage Processing: Helps confirm system functionality before startup and site commissioning.
  • Water and Wastewater Treatment: Facilitates acceptance of control and monitoring systems to secure regulatory compliance.

By conforming to IEC 62381, organizations achieve:

  • Reduced commissioning time through clear test scopes and responsibilities.
  • Enhanced communication and agreement among suppliers, owners, and contractors.
  • Minimized risks associated with system installation and integration failures.
  • Documentation consistency that aids audits and regulatory inspections.

Related Standards

IEC 62381 aligns with and complements several other standards in the process automation domain, including:

  • IEC 62708: Defines the documentation framework referenced within IEC 62381.
  • GAMP (Good Automated Manufacturing Practice): Provides additional guidelines particularly in pharmaceutical industry automation validation.
  • 21 CFR Part 11 (FDA): Pertinent for electronic records and signatures in pharmaceutical automation systems.
  • ISO/IEC Directives Part 2: Governs the standard development process for IEC publications.
  • Other IEC standards on process measurement and control: Such as IEC 61511 for functional safety in process industries.

Implementers and engineers should ensure they use the latest edition of IEC 62381 with relevant normative references to maintain compliance and leverage best practices in automation acceptance testing.


Keywords: IEC 62381, Factory Acceptance Test (FAT), Site Acceptance Test (SAT), Site Integration Test (SIT), automation systems, process industry, acceptance testing procedures, process automation standards, IEC automation testing, process control system validation.

Standard
IEC 62381:2012 - Automation systems in the process industry - Factory acceptance test (FAT), site acceptance test (SAT), and site integration test (SIT)
English and French language
80 pages
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Frequently Asked Questions

IEC 62381:2012 is a standard published by the International Electrotechnical Commission (IEC). Its full title is "Automation systems in the process industry - Factory acceptance test (FAT), site acceptance test (SAT), and site integration test (SIT)". This standard covers: IEC 62381:2012 defines the procedures and specifications for the Factory Acceptance Test (FAT), the Site Acceptance Test (SAT), and the Site Integration Test (SIT). These tests are carried out to prove that the automation system is in accordance with the specification. The description of activities given in this standard can be taken as a guideline and adapted to the specific requirements of the process, plant or equipment. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. The main changes with respect to the previous edition are: The definition of the documents mentioned in this standard is in accordance with future IEC 62708.

IEC 62381:2012 defines the procedures and specifications for the Factory Acceptance Test (FAT), the Site Acceptance Test (SAT), and the Site Integration Test (SIT). These tests are carried out to prove that the automation system is in accordance with the specification. The description of activities given in this standard can be taken as a guideline and adapted to the specific requirements of the process, plant or equipment. This second edition cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. The main changes with respect to the previous edition are: The definition of the documents mentioned in this standard is in accordance with future IEC 62708.

IEC 62381:2012 is classified under the following ICS (International Classification for Standards) categories: 25.040.40 - Industrial process measurement and control. The ICS classification helps identify the subject area and facilitates finding related standards.

IEC 62381:2012 has the following relationships with other standards: It is inter standard links to IEC 62381:2006, IEC 62381:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase IEC 62381:2012 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of IEC standards.

Standards Content (Sample)


IEC 62381 ®
Edition 2.0 2012-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Automation systems in the process industry – Factory acceptance test (FAT),
site acceptance test (SAT), and site integration test (SIT)

Systèmes d'automatisation pour les procédés industriels – Essais d'acceptation
en usine (FAT), essais d'acceptation sur site (SAT) et essais d'intégration sur
site (SIT)
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IEC 62381 ®
Edition 2.0 2012-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Automation systems in the process industry – Factory acceptance test (FAT),

site acceptance test (SAT), and site integration test (SIT)

Systèmes d'automatisation pour les procédés industriels – Essais d'acceptation

en usine (FAT), essais d'acceptation sur site (SAT) et essais d'intégration sur

site (SIT)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 25.040 ISBN 978-2-88912-917-1

– 2 – 62381 © IEC:2012
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 11
4 General preparation before conducting the FAT . 11
4.1 Overview . 11
4.2 Documents typically prepared by owner/contractor . 12
4.3 Documents typically prepared by vendor . 12
5 Factory acceptance test . 12
5.1 General . 12
5.2 FAT test plan . 13
5.3 Test procedure . 13
5.3.1 Test set-up . 13
5.3.2 Conducting of test . 14
5.3.3 Application check procedures . 15
5.4 FAT rework . 16
5.5 Documentation of FAT in accordance with Annex A . 16
6 Site acceptance test . 17
6.1 General . 17
6.2 SAT test plan . 17
7 Site integration test . 17
7.1 General . 17
7.2 SIT test plan . 18
Annex A (informative) FAT test report . 19
Annex B (informative) SAT check list . 31
Annex C (informative) SIT check list . 32
Annex D (informative) FAT certificate . 33
Annex E (informative) SAT certificate . 34
Annex F (informative) SIT certificate . 35
Annex G (informative) Automation system acceptance certificate . 36
Annex H (informative) FAT punch list . 37
Annex I (informative) SAT punch list . 38
Annex J (informative) SIT punch list . 39
Bibliography . 40

Figure 1 – Diagram depicting typical sequence of events for FAT, SAT and SIT with
respect to the project milestones . 7
Figure 2 – Diagram depicting the relationship for the SAT and SIT between the DCS
and subsystems . 8
Figure 3 – Diagram depicting the relationship between the FAT, SAT and SIT with the
relevant plant levels . 8

62381 © IEC:2012 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
AUTOMATION SYSTEMS IN THE PROCESS INDUSTRY –
FACTORY ACCEPTANCE TEST (FAT), SITE ACCEPTANCE TEST (SAT),
AND SITE INTEGRATION TEST (SIT)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62381 has been 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 changes with respect to the previous edition are listed below:
– The definition of the documents mentioned in this standard is in accordance with future
IEC 62708 .
___________
To be published.
– 4 – 62381 © IEC:2012
The text of this standard is based on the following documents:
FDIS Report on voting
65E/222/FDIS 65E/227/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 accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
62381 © IEC:2012 – 5 –
INTRODUCTION
There is an increasing trend in the process industry to shorten the time period for project
execution. At the same time, the complexity of automation systems is being increased due to
the number of connected systems and the use of new technologies, for example, fieldbus
systems.
Experience has shown that the owner, the contractor and the vendor have long and extensive
discussions to unambiguously lay down the scope of activities and responsibilities in order to
achieve a timely delivery and acceptance of automation systems.
This standard is intended to lead to an improvement and acceleration of the negotiation phase
and to a mutual understanding about the scope of activities of each party
The annexes of this standard contain forms which may be used in the test procedures. Buyers
of this standard may copy these forms for their own purposes only in the required amount.

– 6 – 62381 © IEC:2012
AUTOMATION SYSTEMS IN THE PROCESS INDUSTRY –
FACTORY ACCEPTANCE TEST (FAT), SITE ACCEPTANCE TEST (SAT),
AND SITE INTEGRATION TEST (SIT)

1 Scope
This International Standard defines procedures and specifications for the Factory Acceptance
Test (FAT), the Site Acceptance Test (SAT), and the Site Integration Test (SIT). These tests
are carried out to prove that the automation system is in accordance with the specification.
Engineering and manufacturing activities prior to these tests are not covered by this standard.
For application in the pharmaceutical or other highly specialized industries, additional
guidelines (for example, Good Automated Manufacturing Practice (GAMP)), definitions and
stipulations should apply in accordance with existing standards, for example, for GMP
Compliance 21 CFR (FDA) and the Standard Operating Procedure of the European Medicines
Agency (SOP/INSP/2003).
The description of activities given in this standard can be taken as a guideline and adapted to
the specific requirements of the process, plant or equipment. A typical sequence of activities
and events is shown in Figure 1, and their relationship are shown in Figures 2 and Figure 3.

62381 © IEC:2012 – 7 –
Construction Precommissioning  Commissioning

Mechanical Completion
Start up
Loop check Cold commissioning Hot commissioning

Process control system completion

ESD ESD
ESD/DCS
DCS DCS
FAT SAT SIT
Prerequisite for FAT Prerequisite for SAT Prerequisite for SIT
- SW complete - Shipment of system to site - Systems properly connected
- System hooked up - SAT complete
- Proper installation
- Vendor in-house test completed

- System start-up
IEC  136/12
NOTE The loop check can actually be started during the construction phase once the required infrastructure has been installed.
Figure 1 – Diagram depicting typical sequence of events for FAT, SAT and SIT with respect to the project milestones

– 8 – 62381 © IEC:2012
DCS Subsystem 1
Subsystem n
Communication SIT System SAT
IEC  137/12
Figure 2 – Diagram depicting the relationship for the SAT and SIT
between the DCS and subsystems

Typical DCS
Operator level
FAT
SAT
Process level
FAT FAT, partly
SAT SAT or SIT
Rack I/O
Fieldbus
Remote I/O
Fieldbus
Field device
device
Hart, etc
Loop check Loop check Loop check
Process
IEC  138/12
Figure 3 – Diagram depicting the relationship between the FAT, SAT and SIT
with the relevant plant levels
Wiring test
Wiring test
Wiring test
62381 © IEC:2012 – 9 –
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
None
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
automation system
DCS- or PLC-based system for the monitoring and controlling of production facilities in the
process industry, including control systems based on fieldbus technologies
3.1.2
tag
unambiguous alphanumerical descriptor which identifies a sensor or actuator
3.1.3
factory acceptance test
activity to demonstrate that the vendor system and additionally supplied systems are in
accordance with the specification
3.1.4
site acceptance test
activity to demonstrate that the installation of the various vendor systems are in accordance
with the applicable specifications and installation instructions
3.1.5
site integration test
activity to demonstrate that the merging of the various systems to one overall system is
completed and that all components work together as specified
3.1.6
buyer
company which is functionally responsible for the automation system purchased from vendor,
i.e. either the owner or the contractor
3.1.7
owner
company that hired a contractor to build a chemical plant, petrochemical plant, etc.
3.1.8
contractor
company which is hired by the owner to design and build a chemical plant, petrochemical
plant, etc.
NOTE The function of contractor can be fulfilled by the owner.

– 10 – 62381 © IEC:2012
3.1.9
vendor
manufacturer or distributor of the automation system
3.1.10
process industry
industry that uses chemical reactions, separations, or mixing techniques in order to create
new products, modify existing products or treat waste and includes the following types of
industries: chemical, petrochemical, waste treatment, paper, cement, etc. It does not include
such industries as equipment/machine manufacturing or other similar industries. Industries
which are subject to special requirements and or validation, etc. are also not included.
3.1.11
vendor documentation
product describing documents
EXAMPLE Datasheets, handbooks, operating manuals and spare part lists of supplied devices or systems.
3.1.12
test report
documentation of test sequence and results
3.1.13
test plan
overview of tests as provided in the contract
3.1.14
punch list
list of all open tasks
3.1.15
loop list
tabulated list of all E&I tags with tagging, function and PID references
3.1.16
loop sheet
data sheet with essential E&I data concerning tagging, function, description, measuring range,
location, process data, instrument data, etc.
3.1.17
cabinet layout drawing
drawing to scale of equipment, terminal strips, cable trays etc. in cabinets, consoles and
similar
3.1.18
function diagram or logic diagram
description of the E&I functions according to the IEC 61131 series. Use of this term/such a
diagram is limited to digital signal processing only
3.1.19
cause & effect matrix
actuators and sensors assigned to columns and rows according to their function, including
their related switching and/or alarm function and their safety integrity level (SIL)
3.1.20
user requirement specification
rough user specification in view of the customer to be detailed by the requirement
specification
62381 © IEC:2012 – 11 –
3.1.21
requirement specification
complete description of all requirements for the realisation (e.g. of an automation system)
3.1.22
control loop description
description of task, function and operator interface of complex continous control loops
3.1.23
HMI specification
specification containing detailed graphic standards and hierarchy of the human machine
interface e.g. group-, trend-, alarm- and operator display
3.1.24
trip point list & configuration parameter list
tabulated list of all variable parameter for E&I equipment
3.1.25
structure diagram DCS/PLC/SIS
simplified schematic drawing of control systems and their network topology by graphical
symbols, not showing any secondary wiring
3.1.26
safety requirement specification
complete description of all tasks and equipment of the safety instrumented functions,
including their check procedures
3.2 Abbreviated terms
C&E Cause and effect matrix
DCS Distributed control system
ESD Emergency shut-down system
EX-i Intrinsic safety
FAT Factory acceptance testing
FUP Function or logic diagram
HMI Human machine interface
HW Hardware
MC Mechanical completion
PLC Programmable logic controller
SAT Site acceptance test
SIF Safety instrumented function (safety loop)
SIS Safety instrumented system
SIL Safety integrity level
SIT Site integration test
SRS Safety requirement specification
SW Software
4 General preparation before conducting the FAT
4.1 Overview
Prior to commencing the FAT, the vendor shall complete full in-house testing. Test reports
shall be available for inspection.

– 12 – 62381 © IEC:2012
All relevant documents shall be prepared for use during the FAT. The following list shows
documents typically used. The list should be adapted to be project specific.
4.2 Documents typically prepared by owner/contractor
For example, the following documents:
• User requirement specification:
• Preceding agreement(s):
• Function or logic diagrams:
• Cause and effect matrix:
• Sketches of operator displays and relevant text:
• Control loop description:
• Loop list;
• HMI specification;
• Loop sheet;
• Trip point list & configuration parameter list.
• Safety manuals
• Test procedures for all safety instrumented functions
• Classification for each safety instrumented function into the levels SIL1, or SIL 2; or SIL3,
or none.
4.3 Documents typically prepared by vendor
For example, the following documents:
• Requirement specification;
• Vendor documents, operating manual, certificates;
• Structural diagram DCS/PLC, SIS;
• Cabinet layout drawings;
• I/O list;
• Graphic printouts;
• Configuration printout;
• In-house test reports;
• Test plan.
5 Factory acceptance test
5.1 General
The FAT shall be performed by the vendor. The buyer should witness the test activities. There
may be buyers who want to carry out some parts of the FAT themselves. This has to be laid
down on a project-related basis.
The FAT shall comprise the following areas:
• project-relevant scope of supply;
• application-related functions of the automation system from signal source;
• system-related functions;
• adequate infrastructure shall be provided by the vendor.

62381 © IEC:2012 – 13 –
The FAT shall be conducted using the test report given in Annex A.
With respect to the specification, any incomplete work or nonconformances detected during
the FAT shall be recorded on a punch list (Annex H).
Punch list items will be categorized as follows:
• to be cleared on the spot, FAT to continue after rectification;
• on-going rectification during FAT;
• FAT to be repeated;
• modifications to be made after FAT, before the system is shipped to the site;
• remaining work to be rectified, i.e. at site.
The FAT shall be considered complete when the vendor has successfully proven all
necessary functions according to the FAT procedures and specifications, with the exception of
the mutually agreed remaining items of the punch-list.
Upon successful completion of the FAT, authorized representatives of the buyer and the
vendor shall sign the FAT certificate (for an example, see Annex D).
5.2 FAT test plan
A test plan (activities and time-schedule) shall be mutually agreed upon between the buyer
and the vendor. The schedule shall include, but is not limited to, the following activities:
Item Description
1 Start-up meeting (document review, schedule, etc.)
2 Vendor documentation (including in-house test reports) check
3 HW and SW inventory check
4 Mechanical inspection
5 Wiring and termination inspection
6 Start-up test
7 General system functions including hardware redundancy and diagnostic check
8 Visualization/operation
9 Test of functionality against all documents mentioned in Clause 3
10 Complex functionality and operation modes (for example, batch, sequence control)
11 Subsystem interface test
12 FAT rework, punch list for onsite (SAT) work
13 FAT close-out meeting
5.3 Test procedure
5.3.1 Test set-up
5.3.1.1 Rack/remote I/O
According to one or more of the following typical scenarios, a complete test shall be carried
out.
The following scenario is customary.
• Forcing of rack/remote I/O by means of simulation devices hooked up at I/O modules.

– 14 – 62381 © IEC:2012
The scenarios listed below depend upon contract/specification requirements.
• Forcing of I/O by means of SW simulation on processor level.
• Forcing of I/O by means of SW simulation on the I/O modules.
• Forcing of I/O by means of simulation devices hooked up at field terminals (thus test
inclusive marshalling, process interface (Ex), cross-wiring, system cabling, and I/O
modules).
5.3.1.2 Bus interfaces
A generic test shall be carried out for each specified type of field device which is compliant to
the relevant standard. This test shall cover the interoperability of the automation system and
the device.
• One segment shall be built up and tested with all associated devices linked to it. Selection
of the segment shall be mutually agreed upon.
• In the case of distributed control functionality, all concerned segments shall be tested.
• Signals related to segments not built up shall be simulated.
• All relevant documents, data sheets, figures (load, cycle time, architecture) shall be
reviewed for all segments.
5.3.1.3 Subsystem connection
The following scenario is customary.
The test of the link itself and selected loops should be performed by means of a subsystem
simulation device. The value of the signal is forced/monitored in the simulation
device/automation system. The specified architecture, for example, redundancy, medium of
link, glass-fiber or copper cable connection, etc. should be provided as far as practicable.
Other scenarios such as listed below depend upon contract/specification requirements.
• Subsystem is emulated in the automation system; the signals are forced/monitored in the
automation system.
• Subsystem with limited configuration (processor and link devices only) are available to
check real communication and the signals are simulated in the subsystem.
• Complete subsystem, link devices and automation system are available, forcing/monitoring
of I/O at the subsystem/automation system.
The manner of testing shall be defined for each subsystem individually and after consideration
of the project requirements.
5.3.2 Conducting of test
5.3.2.1 Overview
The test activities can be divided into the three following steps:
• Check of system features;
• Project-related scope of supply; and
• Application.
For test report, see Annex A.
5.3.2.2 Test report for the test of system features
This report covers the following.

62381 © IEC:2012 – 15 –
• Start-up test;
• General system functions including hardware redundancy and diagnostic check.
5.3.2.3 Test report for project-related scope of supply
This report covers the following.
• Documentation check;
• HW and SW inventory check;
• Mechanical inspection;
• Wiring and termination inspection.
5.3.2.4 Reference documents
The documents listed in Clause 4 shall serve as the basis for the functionality test. Completed
tags shall be marked and the resulting documents shall be considered as FAT record.
5.3.3 Application check procedures
5.3.3.1 Check of HMI displays
Prior to the loop-oriented test, the static parts of the HMI displays shall be tested.
The following display functionality (static) shall be verified.
• Symbols for vessels, process lines, valves, transmitters, motors, pumps, etc.
• Colours for static items, for example, hand valves, process lines, etc.
• Process flow direction and path, i.e., process line arrows, shall be verified.
• Correct linking of split range control schemes shall be verified.
• Hierarchies and linking of displays shall be verified.
• The dynamic changes of colours, subpictures and data entry points shall be verified.
5.3.3.2 Tag-oriented test
A master document shall be identified prior to the FAT to ensure complete coverage of all
tags. The loop list including all tags connected to DCS and all subsystems visible on DCS
(ESD, PLC, unit controllers, analyser subsystems, etc.) is the preferred master document.
All tags shall be tested as follows.
• The faceplate, for example, functionality, service text, range, units, etc., shall be checked;
• Link to I/O level;
• Related group display;
• Related trends;
• It shall be verified that the tag target on the graphic is in the correct location and that the
colour changes for dynamic targets, for example, valves, motors, bar graphs, etc. are
correct;
• Check of alarm assignments – Sorting criteria (priority, plant area, etc.);
• Check of user log-on level for operation and control.
5.3.3.3 Check of complex functionality and interlocks
The test of complex functionality and interlocks shall be carried out after the tag-oriented test
for the related tags.
– 16 – 62381 © IEC:2012
5.3.3.4 Additional functionality (reporting)
To be defined by the project.
5.3.3.5 Test of communication links to subsystems
The simulation of signals shall be carried out according to the chosen scenario.
The related functions shall be checked according to the tag-oriented test specification.
In addition to the application-related test, system features such as:
• recovery from failure;
• redundancy;
• alternative modes of operation, shall be checked
5.3.3.6 Check of system functionalities
In addition to the application-related test, system features such as:
• recovery from failure;
• redundancy;
• log-on strategy and levels;
• alarm processing strategy and acknowledgement;
• guaranteed system performance (refresh rate, etc.), shall be checked.
5.4 FAT rework
All rectification and subsequent re-check should be executed during the FAT. If this is not
possible, it should be undertaken after the FAT on the basis of a mutual agreement, including
the following points:
• Identification of re-work;
• Action plan/time schedule;
• Execution of re-work;
• Re-check;
• Notification of completion.
5.5 Documentation of FAT in accordance with Annex A
Documentation of FAT in accordance with Annex A includes the following:
a) Print and sign the tested function plans.
b) Date and sign all other documents generated during the FAT.
c) Review the punch list
d) Document the actual HW and SW tested, prepare the complete system and application
SW back-up.
e) Document spare and system load.
f) Provide an index and color copies of all applicable graphic displays.

62381 © IEC:2012 – 17 –
6 Site acceptance test
6.1 General
The SAT shall be performed after the delivery/installation of the system at the buyer’s site.
The SAT is performed to prove the functionality of the system after delivery and installation.
Prior to conducting the SAT, the relevant HW/SW components shall be delivered to the site
and properly installed. The following actions shall be completed during the installation of the
DCS/PLC before the SAT can be carried out:
• HW installation (controllers, I/O cards, marshalling racks, operating/engineering stations);
• Power supply installed for the relevant HW being tested;
• Grounding system installed for the relevant HW being tested;
• Network communications installed (for example, hubs, switches, fibre optics, Ethernet).
A check list for the activities carried out during the SAT is included in Annex B.
6.2 SAT test plan
A test plan (activities and time-schedule) shall be mutually agreed upon between the buyer
and the vendor. The schedule shall include, but is not limited to, the following activities:
Item Description
1 Start-up meeting (document review, schedule, etc.)
2 Vendor documentation check
3 HW and SW inventory check
4 Mechanical inspection (grounding system, power supply, network connections, etc.)
5 Start-up/diagnostic check (turn on power supply, initialize/commission controllers,
perform diagnostic check)
6 Download SW
7 Site integration test
7.1 General
The SIT shall be performed by the buyer after the SAT for each system that has been
successfully completed.
The SIT is performed to test the combination of two or more independent systems that have
been combined in order to obtain the functionality desired by the project control philosophy.
For example, SITs can and should be carried out when integrating the following types of
systems:
• Package units having their own DCS/PLC or unit controller;
• Analyser systems that communicate with DCS/PLCs using non-conventional I/O signals.
• ESD systems;
• Combining DCS/PLCs from several manufacturers;
• Integration of DCS into higher structure factory network;
• Other combinations of systems requiring a SIT can also exist.

– 18 – 62381 © IEC:2012
The SIT should ensure that both systems function together in order to achieve the results
based on the control philosophy. The SIT basically consists of testing the communication and
interaction between the automation system and the subsystem to ensure properly and
sufficiently performed function.
A check list for the basic activities carried out during the SIT is included in Annex C.
7.2 SIT test plan
A test plan (activities and time-schedule) shall be mutually agreed upon between the buyer
and the vendor. The schedule shall include, but is not limited to, the following activities:
Item Description
1 Start-up meeting (document review, schedule, etc.)
2 Vendor documentation check
4 Mechanical inspection (communication link between systems)
5 Diagnostic check (inspect communication between systems, baud rate, etc.)
6 Download SW (if applicable)
62381 © IEC:2012 – 19 –
Annex A
(informative)
FAT test report
A.1 Documentation check
Purpose
To review all FAT relevant documents.
Item Verify document Test result Remarks
1 . P  F  NA

Comments
Nonconformity to be recorded in the punch list, categorized and treated as agreed in the start-
up meeting.
P = Pass
F = Fail
NA = Not applicable
Signature:
– 20 – 62381 © IEC:2012
A.2 HW and SW inventory check
Purpose
To verify that HW architecture, quantities, dimensions, painting, etc. are in accordance with
the relevant documents. Furthermore, SW licences, spares and consumables shall be
checked.
Reference documents
• Approved vendor cabinet layout drawings
• Order
Note
Recommendation: copies of the relevant drawings shall be checked off and signed by the
customer and user to serve as proof.
Item Description Test result
1 HW check P  F  NA
2 Check of SW licenses /versions including firmware P  F  NA
3 Spares, consumables, and tools P  F  NA

Comments
Nonconformity to be recorded in the punch list, categorized and treated as agreed in the start-
up meeting.
P = Pass
F = Fail
NA = Not applicable
Signature:
62381 © IEC:2012 – 21 –
A.3 Mechanical inspection
Purpose
To inspect HW architecture and layout against the approved documents.
Reference documents
• Approved vendor cabinet layout drawings
• Requirement specification
• Applicable standards and codes

Note
Items under 4 will be randomly selected for the test.
Item Description Test result
1 Cable entry, support bars and accessories (cable clamps, P  F  NA
glands, etc.)
2 Labelling, tagging P  F  NA
3 Mounting of components and modules P  F  NA
4 Screwed connections, terminal connections P  F  NA
5 Earthing, equipotential bonding P  F  NA
6 Electric shock protection, warning labels P  F  NA
7 Maintainability of cabinet fans, construction of cabinets P  F  NA
8 Spare capacity P  F  NA
Comments
Nonconformity to be recorded in the punch list, categorized and treated as agreed in the start-
up meeting.
P = Pass
F = Fail
NA = Not applicable
Signature:
– 22 – 62381 © IEC:2012
A.4 Wiring and termination inspection
Purpose
To verify that the wiring is in accordance with the guidelines given by the requirement
specification and that the approved HW documents and workmanship are in compliance with
industry standards.
Reference documents
• Approved vendor cabinet layout drawings
• Requirement specification
• Applicable standards and codes

Note
Items 5 and 6 will be randomly selected for test.
Item Description Test result
1 Wiring and cabling, cabling of internal circuits  P  F  NA
2 Fusing, circuit-breakers P  F  NA
3 Tagging, labelling P  F  NA
4 Segregation of lines, colours, cross-section, voltages, Ex-i P  F  NA
5 Wire crimp inspection P  F  NA
6 Manual wire crimp pull test P  F  NA
7 Cable duct loading P  F  NA
8 I/O wiring to terminals and connector labeling P  F  NA
9 System cable plug orientation P  F  NA
10 System voltage insulation test P  F  NA

Comments
Nonconformity to be recorded in the punch list, categorized and treated as agreed in the start-
up meeting.
P = Pass
F = Fail
NA = Not applicable
Signature:
62381 © IEC:2012 – 23 –
A.5 Start-up text and general system functions
Purpose
To verify that the system has no problems to start up, recover from a power failure and
perform on-line loading. Furthermore, it shall be verified that the system is operating within
the given limits.
Reference documents
• Relevant vendor documentation
• Requirement specification (specified system limits)

Item Description Test result
a
1 New start (start from zero point , stop/start) P  F  NA
2 On-line change P  F  NA
3 Controller cycle time P  F  NA
4 Display call-up time P  F  NA
5 Value update time P  F  NA
6 System load (memory capacity, storage capacity, etc.) P  F  NA
7 Log-on strategy and level P  F  NA
8 Alarm processing strategy and acknowledgement P  F  NA
a
New disc and controller back-up batteries removed.

Comments
Nonconformity to be recorded in the punch list, categorized and treated as agreed in the start-
up meeting.
P = Pass
F = Fail
NA = Not applicable
Signature:
– 24 – 62381 © IEC:2012
A.6 System alarm test
Purpose
To verify the announcement of system-related failures, cabinet alarms and system-generated
alarms to appear on system.
Reference documents
• Vendor documentation
• HMI specification
Item Description Test result
1 Power-supply failure, UPS monitoring P  F  NA
2 Fuse, breaker monitoring P  F  NA
3 Cooling fans P  F  NA
4 Communication, network monitoring  P  F  NA
5 Short circuit, wire break, out of range, earth fault P  F  NA
6 Watchdog, if any P  F  NA

Comments
Nonconformity to be recorded in the punch list, categorized and treated as agreed in the start-
up meeting.
P = Pass
F = Fail
NA = Not applicable
Signature:
62381 © IEC:2012 – 25 –
A.7 Hardware redundancy and diagnostic test
Purpose
To ensure proper operation and monitoring of redundant components.
Reference documents
Vendor relevant documentation
Note
No single action shall effect the operation of the overall system.
Item Description Test result
1 Redundant operation and monitoring of controllers  P  F  NA
2 Redundant operation and monitoring of communication and P  F  NA
networks
3 Redundant operation and monitoring of power supplies  P  F  NA
4 Redundant operation and monitoring of operator stations P  F  NA
5 Redundant operation and monitoring of I/Os, if any P  F  NA
6 Redundant operation and monitoring of all other devices not P  F  NA
mentioned before
Comments:
Nonconformity to be recorded in the punch list, categorized and treated as agreed in the start-
up meeting.
P = Pass
...

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La norme IEC 62381:2012 constitue une avancée significative dans le domaine des systèmes d'automatisation pour l'industrie des procédés. Elle établit un cadre exhaustif pour le Test d'Acceptation en Usine (FAT), le Test d'Acceptation sur Site (SAT) et le Test d'Intégration sur Site (SIT). Ce standard fournit des procédures et des spécifications qui visent à valider que le système d'automatisation respecte les exigences spécifiées. L'un des principaux atouts de la norme IEC 62381:2012 réside dans sa flexibilité. Les descriptions des activités énoncées peuvent être adaptées aux besoins spécifiques du processus, de l'établissement ou de l'équipement concerné. Cette capacité d'adaptation permet aux entreprises de personnaliser les tests selon leurs exigences uniques tout en maintenant un haut niveau de conformité. Un autre point fort est la mise à jour technique qu'elle présente par rapport à la première édition de 2006. Cette révision a intégré des éléments qui s'alignent avec les futurs développements normatifs, notamment la définition des documents selon la norme IEC 62708. Ce positionnement propulse la IEC 62381:2012 dans une contemporanéité nécessaire pour une meilleure intégration des technologies émergentes dans le cadre des tests d'acceptation. En termes de pertinence, IEC 62381:2012 se révèle essentielle pour les entreprises qui cherchent à assurer la qualité et l'efficacité de leurs systèmes d'automatisation. En définissant clairement les étapes nécessaires pour la validation des systèmes, cette norme contribue à réduire les risques d'erreurs et à améliorer la fiabilité des installations industrielles. Dans l'ensemble, la norme IEC 62381:2012 représente une référence incontournable pour les professionnels du secteur, leur fournissant les outils nécessaires pour mener à bien les tests d'acceptation et garantir ainsi le succès de leurs projets d'automatisation.

Die IEC 62381:2012 bietet umfassende Verfahren und Spezifikationen für den Factory Acceptance Test (FAT), den Site Acceptance Test (SAT) und den Site Integration Test (SIT) im Bereich der Automatisierungssysteme in der Prozessindustrie. Der Anwendungsbereich dieser Norm ist klar definiert und ermöglicht es, die Übereinstimmung von Automatisierungssystemen mit den Spezifikationen zu verifizieren. Ein besonders starkes Merkmal der IEC 62381:2012 ist die Flexibilität der beschriebenen Aktivitäten, die als Richtlinie fungieren und an die spezifischen Anforderungen von Prozessen, Anlagen oder Ausrüstungen angepasst werden können. Diese Anpassungsfähigkeit ist entscheidend für die Implementierung in unterschiedlichsten industriellen Kontexten und trägt zur Effizienz und Sicherheit der Tests bei. Die zweite Ausgabe dieser Norm stellt eine technische Überarbeitung dar und ersetzt die erste Auflage von 2006. In dieser Überarbeitung wurden wesentliche Änderungen vorgenommen, insbesondere hinsichtlich der Dokumentendefinitionen, die gemäß der zukünftigen IEC 62708 harmonisiert sind. Diese Aktualisierungen machen die Norm besonders relevant für Fachleute, die sich in einem sich schnell entwickelnden technologischen Umfeld bewegen und sicherstellen möchten, dass ihre Tests den neuesten Standards entsprechen. Insgesamt stellt die IEC 62381:2012 eine wichtige Ressource dar, die den Rahmen für die Durchführung zuverlässiger und effektiver Tests in der Prozessautomatisierung bereitstellt. Die klare Struktur und die nachvollziehbaren Anforderungen fördern nicht nur die Qualitätssicherung, sondern auch die Sicherheit im gesamten Testprozess.

IEC 62381:2012 표준은 공정 산업에서의 자동화 시스템에 대해 공장 수용 테스트(FAT), 현장 수용 테스트(SAT), 현장 통합 테스트(SIT)의 절차 및 사양을 정의하고 있습니다. 이 표준은 자동화 시스템이 사양에 부합함을 증명하기 위해 수행되는 테스트에 대한 내용을 담고 있으며, 이러한 테스트는 공정, 플랜트 또는 장비의 특정 요구사항에 맞춰 조정될 수 있습니다. IEC 62381:2012의 주요 강점 중 하나는 자동화 시스템의 신뢰성과 일관성을 보장する 테스트 절차를 명확하게 규명했다는 점입니다. 또한, 이 표준은 2006년에 발표된 첫 번째 판을 대체하며, 기술적으로 최신의 요구사항을 반영하기 위해 개정되었습니다. 새로운 판에서는 문서 정의가 향후 IEC 62708에 맞춰 조정되어 있어, 향후 관련 표준들과의 일관성을 유지하는 데 기여합니다. 이 표준의 범위와 내용은 공정 산업에서의 자동화 시스템의 품질 보증을 위한 기반을 제공합니다. 특히, FAT, SAT, SIT 테스트가 각각의 단계에서 시스템이 설계된 대로 작동하는지를 검증할 수 있는 명확한 지침을 제공하고 있어, 기업들이 테스트 계획을 수립하는 데 실질적으로 유용합니다. 이러한 요소들은 IEC 62381:2012가 공정 산업 내 자동화 시스템의 성공적인 구현을 위한 필수 문서로 자리매김할 수 있게 합니다.

IEC 62381:2012は、プロセス産業における自動化システムの工場受入試験(FAT)、現場受入試験(SAT)、および現場統合試験(SIT)に関する手順と仕様を定義しています。この標準は、これらの試験を実施することで、自動化システムが仕様に従っていることを証明することを目的としています。標準に示された活動の説明は、プロセス、プラントや設備の特定の要件に応じて調整可能なガイドラインとして利用できます。 この標準は、2006年に発行された初版を取り消し、置き換えるものであり、技術的な改訂が行われています。特に、前版に対する主な変更点は、標準に記載されている文書の定義が今後のIEC 62708に従っている点です。この技術的なアップデートにより、関係者は最新の情報に基づいた受入試験の実施が可能となります。 IEC 62381:2012は、プロセス産業における自動化システムの信頼性を向上させるための重要な基準であり、全体のテストプロセスを体系化することで、品質管理を強化します。その実用的なアプローチは、エンジニアやプロジェクトマネージャーにとって、効率的な自動化システム評価のための不可欠なツールとなるでしょう。

IEC 62381:2012 comprehensively defines the procedures and specifications for crucial testing phases in automation systems within the process industry-namely, the Factory Acceptance Test (FAT), Site Acceptance Test (SAT), and Site Integration Test (SIT). The clarity and structure of this standard ensure that it provides a robust framework for verifying compliance with automation specifications, thus enhancing overall project reliability. One of the notable strengths of IEC 62381:2012 is its adaptability. The standard encourages stakeholders to customize the outlined procedures to fit the unique requirements of specific processes, plants, or equipment, promoting flexibility while adhering to essential testing principles. This adaptability is particularly valuable in diverse industrial environments where automation systems can vary significantly in complexity and application. In addition, the document's alignment with future IEC 62708 in defining pertinent documents demonstrates a forward-thinking approach, ensuring that it stays relevant as technological advancements emerge in the automation sector. This forward compatibility is crucial for organizations that prioritize ongoing compliance and best practices in their automation efforts. The technical revisions made in this second edition, which replaces the first issued in 2006, reflect the evolving nature of automation technology and industry standards. Stakeholders can have confidence in the comprehensive nature of the guidelines, which have been updated based on contemporary industry needs and practices. Overall, IEC 62381:2012 stands as a pivotal reference point for organizations seeking to implement standardized testing for automation systems, cementing its significance in the process industry and enhancing its relevance against the backdrop of continuous technological evolution.