I agree with Eric's assesment. The intention of sub-devices is for an array of devices of "like" things. This doesn't mean they all have to be identical. i.e. it is okay to have a Non-Dim module in a dimmer rack.
I'd say the general expectation is that the Personality list for the sub-devices is all the same. Each sub-device can have a different Personality, but the reported list of sub-device options is generally expected to be the same across all the sub-devices. This is not a hard requirement, but rather what I think is a general expectation many controllers may have.
In a large system, no one wants to querty n number of personality descriptions across 500 sub-devices.
It is perfectally reasonable and generally expected that the options for the Root device would be different than the Sub-Devices though.
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Scott M. Blair
RDM Protocol Forums Admin
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