Must a device support 32 charecters in DEVICE_LABEL? - E1.20 RDM (Remote Device Management) Protocol Forums

prwatE120 · November 7th, 2008

I cannot find anywhere in the standard where we mandate a requirement to support 32 characters for a SET:DEVICE_LABEL.

I dont disagree that it would be nice from a controllers point of view for all devices to act the same, and accept the full number of characters - but that is not yet in the standard!

The RDMLabpack only accepts a 16character device label, and uses NACK_DATA_OUT_OF_RANGE to reject larger strings. Some of our other products behave in a similar manner because of restricted non-volatile memory.

I would envisage supporting the 32characters whereever possible, but I would not personally recommend ACK'ing a message unless I was going to save exactly what I had been given.

Peter Willis

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November 7th, 2008	#5
prwatE120 Task Group Member Join Date: Jun 2006 Posts: 181	I cannot find anywhere in the standard where we mandate a requirement to support 32 characters for a SET:DEVICE_LABEL. I dont disagree that it would be nice from a controllers point of view for all devices to act the same, and accept the full number of characters - but that is not yet in the standard! The RDMLabpack only accepts a 16character device label, and uses NACK_DATA_OUT_OF_RANGE to reject larger strings. Some of our other products behave in a similar manner because of restricted non-volatile memory. I would envisage supporting the 32characters whereever possible, but I would not personally recommend ACK'ing a message unless I was going to save exactly what I had been given. Peter Willis