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Electronic Theatre Controls Inc

RDM Causes Odd Behavior in HES Fixtures

What is RDM?

"Remote Device Management or RDM is a protocol enhancement to USITT DMX512 that allows bi-directional communication between a lighting system controller and attached RDM compliant devices over a standard DMX line. This protocol will allow configuration, status monitoring, and management of these devices in such a way that does not disturb the normal operation of standard DMX512 devixes that do not recognize the RDM protocol."

Description/Explanation of Issue

RDM is enabled either at the controller or in the networking setup/devices installed and HES Fixtures exhibit odd behavior such as: twitching, re-homing, glitches, etc. To take advantage of the technical capabilities of the RDM system, each fixture must have a unique RDM PID, this unique identifying number is used by the controller to manage an individual fixture. There cannot be duplicate RDM PID on the same DMX cable run, this will result in a data collision, and the controller may or may not notify of this issue. Ensure that all fixtures have a unique RDM PID if RDM functionality is to be used. If DMX splitters are used and RDM control is to be used, these splitters must support RDM. The number and type of RDM parameters depend on the RDM controller being used. 



  1. Navigate to:  Set ‐> Service Settings ‐> Service PIN Press <UP> button to select 050 and press  <ENTER>
  2. Navigate to RDM PID:  Press the <UP> button to select unique ID’s for each fixture and press  <ENTER>

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