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The central component in a CANopen device is the "Object Directory (OD)". The OD is organized as a table with object entries. Each "Entry" is addressed with a unique combination of "Index" and "SubIdx". The index is a 16 bit value (from 0 ... 0xFFFF), and the sub-index is a 8 bit value (from 0 ... 0xFF). Within the CANopen standard, the layout and usage of many object entries is specified and marked as "mandatory", "optional" or "manufacturer specific". The following table shows an overview of the OD areas:
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Within this state machine, the state transitions with a number (e.g. [129]) will be activated with a network management command equal to this number. If no transition criteria is stated, the transition will be activated after finished state operations automatically. The following table summarizes the network management commands:
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