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ACM has no way of determining which objects are in class 1/2/3 for any given device. It can’t prevent an item from being defined with the wrong class. It will allow items for the same object to be defined with multiple class 1/2/3 modifiers, even though the item can only be in one of the classes in the device. The user is responsible for determining and using the correct class 1/2/3 modifier for the object.
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Items using the :c1, :c2, and :c3 modifiers can also be updated by class 0 polls as described in the sections below. It’s not necessary or correct to define the same item again with a :c0 modifier. |
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