Does controller need it's UID and support any PIDs? - E1.20 RDM (Remote Device Management) Protocol Forums

ericthegeek · January 18th, 2016

I'm a bit confused. Can you give more details about your setup and how things are connected? What controller are you using and what's wired to what?

There can only be one controller, and it doesn't need to discover itself or respond to any PIDs (It already knows everything about itself)

The Enttec USB boxes can be configured to run as an RDM Controller, or as an RDM responder (but they can't do both simultaneously). It sounds like yours might be configured to act as a responder. The ACK Timer behavior is common for USB-attached RDM Responders since the host computer can't guarantee it will respond within the 2ms response window.

I've only used the older Enttec USB boxes and you had to explicitly configure them to be a controller or a responder. It's possible that the newer NK2 units can auto-switch.

alvangee · January 19th, 2016

Eric, I have a net with our own Controller (i.e. hardware and firmware was developed by our company, not third-party), couple of our own responders and Enttec Mk2. All of them are connected to one DMX/RDM bus. Enttec Mk2 works as a Controller via Enttec's PC program.

When I perform discovery with my Controller it finds both responders and Enttec Mk2's UID, so Mk2 responds to Discovery requests. I can't set Mk2 to be responder even if I want as I did not purchase license for their Responder PC program. When I request with my Controller any PIDs (for example, Manufacturer Label, Device Info) from Mk2 it responds with ACK_TIMER.

Again, it's not Mk2's behavior I am worrying about. Since I am using Enttec as a reference (assuming that it is widely accepted in community DMX/RDM developer), I wonder if our own Controller should behave similar and whether I need to make my own Controller respond to any requests including Discovery?

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January 18th, 2016	#1
ericthegeek Task Group Member Join Date: Aug 2008 Posts: 390	I'm a bit confused. Can you give more details about your setup and how things are connected? What controller are you using and what's wired to what? There can only be one controller, and it doesn't need to discover itself or respond to any PIDs (It already knows everything about itself) The Enttec USB boxes can be configured to run as an RDM Controller, or as an RDM responder (but they can't do both simultaneously). It sounds like yours might be configured to act as a responder. The ACK Timer behavior is common for USB-attached RDM Responders since the host computer can't guarantee it will respond within the 2ms response window. I've only used the older Enttec USB boxes and you had to explicitly configure them to be a controller or a responder. It's possible that the newer NK2 units can auto-switch.

January 19th, 2016	#2
alvangee Junior Member Join Date: Jan 2015 Posts: 10	Eric, I have a net with our own Controller (i.e. hardware and firmware was developed by our company, not third-party), couple of our own responders and Enttec Mk2. All of them are connected to one DMX/RDM bus. Enttec Mk2 works as a Controller via Enttec's PC program. When I perform discovery with my Controller it finds both responders and Enttec Mk2's UID, so Mk2 responds to Discovery requests. I can't set Mk2 to be responder even if I want as I did not purchase license for their Responder PC program. When I request with my Controller any PIDs (for example, Manufacturer Label, Device Info) from Mk2 it responds with ACK_TIMER. Again, it's not Mk2's behavior I am worrying about. Since I am using Enttec as a reference (assuming that it is widely accepted in community DMX/RDM developer), I wonder if our own Controller should behave similar and whether I need to make my own Controller respond to any requests including Discovery?