GB/T 24476-2023Internet of things for lifts, escalators and moving walks - Technical requirements of enterprise application platform (English PDF)

Foreword

This document was issued on 23 May 2023 by the State Administration for Market Regulation; Standardization Administration of the PRC and takes effect on 1 December 2023.

It is a GB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

1 Scope

GB/T 24476-2023 covers the enterprise application platform standing behind lift, escalator and moving walk connectivity: the system owned by the manufacturer or the maintenance company, which receives what the equipment reports and is where that data is actually used. The platform boundaries are drawn first, so that it is clear where the device and the network end and the platform begins, then come the requirements on the platform itself, the equipment statistics information it has to produce, and the basic equipment, maintenance and inspection information it must hold, down to the format each field takes. A normative annex classifies fault phenomena, and informative annexes cover the communications and dispatch arrangement and a RESTful web API. Connectivity of this kind is sold on faster response to trapped passengers and on maintenance driven by condition rather than the calendar, and both claims fall apart on definitions: if one company logs a door fault where another logs a safety circuit trip, and the same lift is identified differently in two systems, the figures can neither be added together nor handed to a regulator. Lift manufacturers, maintenance companies, platform developers and the authorities that supervise lifts in service are the users.

This Document specifies requirements for the enterprise IoT application platform for equipment,

equipment statistics requirements, as well as requirements for equipment basic information,

maintenance and inspection information and formats.

This Document applies to the construction, renovation, and expansion of IoT-based enterprise

application platforms for lifts, escalators, and moving walkways.

This Document does not apply to the operation of lifts, escalators, and moving walkways

controlled by IoT technology.

2 Normative References

The provisions in following documents become the essential provisions of this Document

through reference in this Document. For the dated documents, only the versions with the dates

indicated are applicable to this Document; for the undated documents, only the latest version

(including all the amendments) is applicable to this Document.

GB/T 7024 Terminology of lifts, escalators and moving walks

GB/T 7588.1 Safety rules for the construction and installation of lifts - Part 1.Passenger

and goods passenger lifts

GB 16899 Safety rules for the construction and installation of escalators and moving walks

GB/T 22239-2019 Information security technology - Baseline for classified protection of

cybersecurity

GB/T 38656-2020 Specification of date exchange for special equipment IoT system

GB/T 42616-2023 Internet of things for lifts, escalators and moving walks - Technical

specification of monitoring terminals

IETF RFC 5246 The Transport Layer Security (TLS) Protocol Version 1.2

IETF RFC 6749 Open Authorization 2.0

3 Terms and Definitions

For the purposes of this Document, the terms and definitions given in GB/T 7024, GB/T 7588.1,

GB/T 16899 and the following apply.

3.1 Equipment

It indicates the lifts, escalators, and moving walks.

3.2 People trapped

The phenomenon that passengers are trapped in the elevator car due to elevator failure or

incident.

3.3 Enterprise IoT application platform for equipment

The application platform that is established by the enterprise based on the Internet of Things

and information technology monitors the real-time status of equipment and is used to quickly

handle equipment failures, incidents and alarms. It also has functions such as data management,

statistical analysis and data interaction with the equipment safety public information service

platform.

3.4 Fault

A condition that could affect or interrupt the normal operation of the equipment.

3.5 Event

The state changes that are expected in the design during the operation of the equipment.

3.6 Alarm

Operation of the emergency alarm system in the cage of lift.

NOTE. For emergency alarm systems, refer to GB/T 7588.1.

3.7 Monitoring terminal

A general term for protocol conversion devices, external sensors, data acquisition and

transmission devices, image acquisition devices, alarm triggering devices, in-cage of lift display

devices, and voice control devices.

NOTE 1.Relevant regulations may require public domain image acquisition and the display content of

in-cage of lift display devices.

NOTE 2.The monitoring terminal may be integrated into the equipment.

[SOURCE. GB/T 42616-2023, 3.3]

3.8 Equipment code

The unique code representing the equipment marked on the special equipment registration

certificate.

4 Abbreviated Terms

The following abbreviated terms are applicable to this Document.

PDF. Portable Document Format;

RESTful Web API. Representational State Transfer Web Application Programming Interface.

5 Requirements for Enterprise IoT Application Platform for

Equipment

5.1 Platform boundaries

A schematic diagram of the boundaries of the enterprise IoT application platform for equipment

is shown in Figure 1.

5.2 Basic requirements for platform

5.2.1 The platform design shall be comprehensively planned, fully considering data resource

sharing and interoperability with the equipment safety public information service platform.

5.2.2 Qualified maintenance personnel or organizations shall perform technical maintenance of

the system. Maintenance work shall at least include timely updating, organization, and backup

of relevant data.

5.2.3 Platform failures shall not affect the security and integrity of the platform's basic data.

5.2.4 The platform shall be able to adapt to data storage requirements, have sufficient query and

retrieval capabilities, and permanently store equipment fault, event, alarm information, and the

handling information in 5.3.3.

5.2.5 The platform shall be able to provide the information specified in Tables 1 and 2, as well

as Tables 1, 2, 3, and 4 of GB/T 42616-2023 (excluding fault, event, and alarm information

during maintenance operation or emergency electric operation) to the equipment safety public

information service platform.

5.2.6 Data generated during platform operations must clearly define ownership, responsibilities,

and obligations.

5.3 Platform functions

5.3.1 The platform shall include.

a) Basic equipment information management, see Table 1;

b) Receiving and handling fault, event, and alarm information;

c) Equipment statistics for the enterprise IoT application platform for equipment in Clause

6;

d) Equipment statistics in Table 3 of GB/T 42616-2023;

e) Inspection information, see Table 2;

f) Equipment insurance information (if any), see Table 2;

g) Maintenance information (maintenance personnel, maintenance date, maintenance

duration, maintenance results, etc.), see Table 2;

h) Image system (if any), see Section 5.6;

i) Communication and dispatch system (if any), see Appendix A.

5.3.2 The platform shall respond to all service categories in Table 2 and prioritize handling

trapped personnel and alarm signals.

5.3.3 If the equipment fails, the maintenance organization shall report the failure classification

according to Table B.1 in Appendix B after completing the service.

5.4 Platform safety

5.4.1 The platform shall have a robust application safety guaranteeing mechanism, be able to

authenticate the identity of logged-in users, and record user operations (such as data entry and

modification, etc.).

5.4.2 The platform shall meet at least the Level-2 safety protection requirements in GB/T

22239-2019.

5.4.3 The platform shall implement technical measures to monitor and record the processing of

user information, and retain network logs of relevant events for at least 6 months.

5.5 Platform data management

5.5.1 The platform shall be able to accurately receive equipment fault, event, alarm, statistical

information, and real-time operating status information; and provide the information specified

in this Document to the equipment safety public information service platform.

5.5.2 The platform shall be able to query the information specified in 5.2.5.

5.5.3 The platform shall be able to maintain basic equipment information (see Table 1) and

maintenance and inspection information (see Table 2).

5.5.4 The platform shall exchange data with the equipment safety public information service

platform in accordance with the requirements of Clause 6 in GB/T 38656-2020, using a

RESTful Web API. For interface design, refer to Appendix C.

5.5.5 The platform shall be able to detect the offline status of a monitoring terminal within 30

min.

5.5.6 The platform shall be accessible by the equipment safety public information service

platform and provide the information specified in 5.2.5.

5.5.7 Data transmission and storage between the platform and the equipment safety public

information service platform shall have security policies, such as data encryption and

permission management for remote data access.

5.5.8 The platform may provide the specified images to the equipment safety public information

service platform.

5.6 Image System (if any)

5.6.1 The image system primarily includes image acquisition, image access, video

encoding/decoding, image storage, image management and application, and image display, etc.

5.6.2 The imaging system shall provide the following basic functions.

a) Stored images shall have a resolution of at least 640x480, with a frame rate of at least 15

Hz for dynamic image storage; the pixel count of stored images shall be at least 640x480.

b) Image information stored in the enterprise IoT application platform for equipment as

specified in 5.4.2.2b) of GB/T 42616-2023 shall be retained for at least 4 years. The

system shall support retrieval of stored image data by various methods, including image

source, recording time, and alarm category, etc.

c) Image file protection measures shall be implemented to prevent tampering or ensure file

integrity.

6 Requirements for the Equipment Statistics Information of

the Enterprise IoT Application Platform for Equipment

6.1 General

See Appendix B for the classification of equipment failure and non-equipment failure

phenomena.

6.2 Fault statistics

During the preset time period, the failure-related trip rate shall be calculated according to

Formula (1); the equipment failure-related trip rate shall be calculated according to Formula

(2); and the non-equipment failure-related trip rate shall be calculated according to Formula (3).

Where.

Pt - failure-related trip rate;

Pt1 - equipment failure-related trip rate;

Pt2 - non-equipment failure-related trip rate;

Tg - failure-related trip time;

Tg1 - equipment failure-related trip time;

Tg2 - non-equipment failure-related trip time;

Tf - time when the equipment shall provide service within the preset time period.

6.3 Statistics of trapped personnel

During the statistical period, the trapped personnel rate shall be calculated according to Formula

(4); the trapped personnel rate due to equipment failure shall be calculated according to Formula

(5); and the trapped personnel rate due to non-equipment failure shall be calculated according

to Formula (6).

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