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RDM Interpretation Questions Discussion and questions relating to interpreting and understanding the E1.20 RDM Standard.

 
 
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Old April 30th, 2012   #1
wayne@artisticlicence.com
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Default Sub Device required PIDs

At the plug-fest Bob presented an interesting point: Do Sub Devices need to implement the minimum required PIDs list?
My common sense answer was yes, but review of the document suggests this is not a given.
The root device must support the 'required pids'. Sub Devices must all support the same set of pids which can differ from the root.
However 9.2.3 is open to interpretation. The problem is caused by the phrase 'which additional messages...'. The word additional implies 'in addition to the minimum required pid list' but could also be read to mean 'in addition to the SUPPORTED_PARAMETERS pid.
So there are two possibilities:
a) Sub devices shall at minimum implement the required pid list along with SUPPORTED_PARAMETERS.
b) Sub devices shall at minimum implement the SUPPORTED_PARAMETERS pid.
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