ISO 24631-7:2012
Radiofrequency identification of animals — Part 7: Synchronization of ISO 11785 identification systems
Radiofrequency identification of animals — Part 7: Synchronization of ISO 11785 identification systems
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 17
- Дата публикации:
- 3 декабря 2012 г.
- Издание:
- ISO IS 24631 edition 1 version 1
- ICS:
- 65.040.99
ISO 24631-7:2012 specifies rules and procedures for synchronizing RFID transceivers while reading transponders used in individual animal identification complying to ISO 11784 and ISO 11785. The synchronization scheme described herein may be fully implemented within each reader, and such readers when attached to the synchronization bus create a peer-to-peer network (all readers are equal ? there is no dedicated master). Additionally, a cluster of readers, which could be in a master/slave configuration, may also be added to the bus using a dedicated, manufacturer specific Synchronization Interface. The Synchronization Interface presents to the synchronization bus electrical characteristics identical to those of a single peer-to-peer reader. The transceiver conformance standard ISO 24631-2 permits activation on/off timing tolerances of −0/+1 ms and therefore gives reader manufacturers options as to their preferred method for detecting the HDX header; partial or full. However, when synchronizing readers, irrespective of which header detection method is used, it is critical that all readers adhere strictly to the specific timings and timing tolerances as given in the timing diagrams. Particular attention should also be given to fault diagnostics which becomes more important when a reader network comprises products from different manufacturers. The obvious case is where a reader which is part of a network has become detached e.g. sync cable break, and it considers it's self to be now standalone and thus permitted to operate asynchronously to the detriment of all other readers.
Abstract
Overview
ISO 24631-7:2012 defines the synchronization rules and procedures for RFID transceivers used in individual animal identification conforming to ISO 11784 and ISO 11785. The standard ensures multiple RFID readers operating in physical proximity coordinate their transmitter ON/OFF periods to avoid mutual interference when reading HDX (half‑duplex) and FDX (full‑duplex) transponders. It specifies sync signals, cycle timing, reader states, fault considerations and minimum electrical/logic arrangements for a wired synchronization bus.
Key topics and technical requirements
- Synchronization architecture
- Peer‑to‑peer reader network via a synchronization bus (no dedicated master).
- Optional clusters (master/slave) may join using a manufacturer-specific Synchronization Interface that presents identical electrical characteristics to the bus.
- Cycle timing and modes
- Idle cycle: 50 ms ON (FDX receive) followed by 4 ms OFF (HDX receive).
- Every 10th cycle: fixed 50 ms ON / 20 ms OFF with a special MRS pulse.
- Sync signals
- MRS (Mobile Reader Sync) pulse: 20 ms ± 0.5 ms; marks cycle boundaries and enables mobile readers to synchronize.
- HDX extension: OFF period extended to a fixed 20 ms when HDX transponder detected; start between 3–4 ms after OFF begins; extension < 17 ms.
- FDX extension: ON period may be extended in 2 ms increments up to a maximum 100 ms; cannot be extended on the 10th cycle; must not mimic the MRS pulse duration.
- Timing tolerances
- Conformance allows activation on/off tolerances of −0 / +1 ms (see ISO 24631-2), making strict adherence to timing diagrams critical.
- Operational states & diagnostics
- Initialization and operational states; readers must detect MRS or extension signals to synchronize.
- Emphasis on fault diagnostics-e.g., sync cable breaks or mixed‑manufacturer networks-to prevent a detached reader from operating asynchronously.
Applications and users
- Who uses it: RFID reader manufacturers, system integrators, livestock tag suppliers, test labs, regulatory agencies and integrators deploying multi‑reader animal ID systems.
- Practical value: Prevents reader interference in farms, abattoirs, veterinary clinics, wildlife monitoring and transport nodes; enables mobile readers to read near synchronized stationary systems; supports multi‑vendor interoperability and reliable field performance.
Related standards
- ISO 11784:1996 - Code structure for animal RFID
- ISO 11785:1996 - Technical concept (includes Annex C on adaptive timing)
- ISO 24631-2 - Transceiver conformance (timing tolerances)
- ISO 24631 series (Parts 1–6) - Conformance and performance evaluation and data representation for animal RFID
Keywords: ISO 24631-7, RFID synchronization, animal identification, ISO 11785, HDX, FDX, MRS pulse, synchronization bus.
Технические детали
- Технический комитет
- ISO/TC 23/SC 19 - Agricultural electronics
- SKU
- ISO 24631-7:2012
Похожие стандарты
Стандарты, упомянутые в описании
ISO 11784:1996
ОтменёнRadio frequency identification of animals — Code structure
Overview ISO 11784:1996 is an internationally recognized standard that defines the code structure for radio-frequency identification (RFID) of animals. Established by the International Organization f…
ISO 11785:1996
ОтменёнRadio frequency identification of animals — Technical concept
Overview ISO 11785:1996 specifies the technical concept for radio‑frequency identification (RFID) of animals. It defines how animal transponders are activated and how stored identification informatio…
ISO 24631-3:2025
ДействующийRadiofrequency identification of animals — Part 3: Evaluation of performance of RFID transponders conforming…
Overview ISO 24631-3:2025 - "Radiofrequency identification of animals - Part 3: Evaluation of performance of RFID transponders conforming with ISO 11784 and ISO 11785" specifies standardized test pro…