showstack / glossary / rdm-sub-device
RDM sub-device RDM 子裝置
A logical device inside one physical RDM device, addressed by number so that a multi-channel product can expose each channel separately under a single UID. Root device zero is the box itself and carries what belongs to the box; sub-devices carry what belongs to each channel or cell. A twelve-way dimmer rack is typically one UID and twelve sub-devices.
中文
RDM 實體裝置內部的邏輯裝置，以編號定址，使多通道產品能在單一 UID 之下分別呈現各 通道。根裝置（編號 0）代表機箱本身，承載屬於機箱的參數；子裝置則承載屬於各通道或各燈珠 的參數。十二路調光櫃通常就是一個 UID 加十二個子裝置。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK / US | Sub-device | |
| HK / TW | 子裝置 / sub-device |
Easy to get wrong
Addressing the root of a multi-cell fixture addresses the fixture, not its first cell. Some products use separate UIDs per channel instead, and patch differently.
Where it shows up on the wire
Sources
- ANSI E1.20 Remote Device Management over DMX512 networks — ESTA Technical Standards Program primary
Understand the mechanism
Something wrong, or missing?
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