Rdm Facility - Jands HPC AIRGAP Operating Manual

Dimmer Operation

5.3 RDM Facility

RDM is a specification for a protocol that enables a RDM "controller" to set and alter
parameters within a RDM "device" via the DMX-512 connection. An RDM system
consists of one RDM controller and at least one RDM device. The HPC is an RDM
device.
The HPC includes RDM commands that enable most of the parameters in its menu to
be altered and to change the function of each channel between On, Off, Dim, and
Switch. Refer to Section 9.2 for further information regarding the RDM commands
implemented by the HPC.
In general a RDM controller should automatically "discover" the HPC (and any other
connected/powered devices) when it's turned on. If not, ensure RDM Discovery is
enabled in the controller, power up the HPC, and re-initiate Discovery on the
controller. Refer to the operation manual for the controller regarding how to use it to
read/alter HPC parameters.
When using the DMX connection, all RDM commands are received on pins 2 and 3 of
the DMX cable.
Revision 2.0c – 30 August 2013 HPC User Manual
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