IEC 62386-105:2020 pdf free download

IEC 62386-105:2020 pdf free download Digital addressable lighting interface – Part 105: Particular requirements for control gear and control devices – Firmware transfer
Typically, a bus unit according to lEC 62386 (all parts) contains firmware. There arecircumstances where it might be necessary to change the firmware after production orshipping of the product. For example if the bus unit does not operate as intended. In such acase, a firmware update of a bus unit via the interface is beneficial.
This firmware update process is primarily designed to be a bug fix process，not a featureextension process. Nevertheless the firmwareupdate process can’ be used for featureextensions. But it is important that the risk of negative effects to the complete system isconsidered in detail.
NOTEAnnex D provides a “Firmware update management check sheet”to support risk estimation.
2Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document. For dated references,only the editioncited applies.For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 62386-101:2014,Digital addressable lighting interface – Part 101: General requirements-System components lEC62386-101:2014IAMD1:2018
IEC 62386-102:2014，Digital addressable lighting interface – Part 102: General requirements- Control gear lEC62386-102:2014/AMD1:2018
IEC 62386-103:2014,Digital addressable lighting interface -Part 103: General requirements- Control devices IEC62386-103:2014/AMD1:2018
3 Terms and definitions
For the purposes of this document,the terms and definitions given in IEC 62386-101,IEC62386-102 and lEC 62386-103 and the following apply.
IsO and lEC maintain terminological databases for use in standardization at the followingaddresses:
IEC Electropedia: available at http://www.electropedia.orgl
Iso Online browsing platform: available at http://www.iso.orglobp
3.1
firmware
FW
software programmed into a control gear or control device, which can be changed during an update
Note 1 to entry: This note applies to the French language only.
3.2
CRC
cyclic redundancy check
checksum used to prevent data corruption
Note 1 to entry: Annex B provides detailed information about CRC calculation.
4 General
4.1 General
The requirements of IEC 62386-101:2014 and IEC 62386-101:2014/AMD1:2018 apply, with the restrictions, changes and additions identified below.
NOTE Systems with a single-master application controller are unlikely to operate correctly when other master control devices, such as upgrade tools, are connected.
4.2 Transmitters and receivers in bus units
The requirements of IEC 62386-101:2014 and IEC 62386-101:2014/AMD1:2018, 4.6.1 shall be extended as follows.
Bus units supporting firmware transfer shall be additionally capable of receiving 32 bit forward frames as specified in IEC 62386-101:2014, 7.4.3 (Reserved forward frame).
4.3 Logical units in a bus unit If the firmware update process is started on a bus unit, all logical units inside the bus unit shall be affected. All variables defined in Table 5 shall be shared by all logical units of the bus unit.