General
The modular device concept is useful when creating a configuration based on reusable modules, for example when modelling a backplane device with pluggable modules.
The first slot (slot 0) is always occupied by the Device Access Point (DAP) module, which represents the head node where the Anybus CompactCom is located. It is not allowed to add a process data mapping for any ADI within the range of slot 0. The remaining slots are assigned fixed ranges of ADIs, set up using the Modular Device Object. A GSD module can represent different ADIs, depending on which slot it occupies, making it possible to create a configuration based on reusable modules. This is not possible in ADI based RI mode.
See also ...
“ Modular Device Object (ECh)” (see Anybus CompactCom 40 Software Design Guide)