CANopen communication
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05/16/2007
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4.2.3 Drive-specific functions
4.2.3.1 DSP 402 state machine
If the drive as CANopen slave is in
OPERATIONAL
, status, drive-specific functions
can be addressed. Figure 8 provides an overview of the states defined in the DSP 402
drive profile and the transitions between these states. The current status is shown by
the status word (ZSW). In Figure 8 the states are represented by rectangles with
rounded corners. The binary representation of the ZSW is provided in each case. Any
bit that is marked with 'x' is not relevant for determining the state. The state transitions
are marked by arrows, which specify the condition for the corresponding transition. In
most cases this is a command in the control word (STW), which is also defined by
certain bit combinations. Bits marked with 'x' are not relevant. STW.x denotes bit x of
the STW, STW.7: 0->1 means "rising edge STW.7". In an error situation, you go from
each of the states in the drawn-in rectangle to the "Error reaction active" state.
Figure 8: DSP 402 state machine