Communication profiles
46
behaviour is that the reference speed of the drive is set to the
requested value.
This is an example of Explicit Messaging where each attribute of a
class is set individually. While this is allowed, it is inefficient.
Instead Implicit Messaging using Input and Output Assembly
Instances is recommended. Implicit Messaging allows the
Ethernet/IP Master to set or get predefined groups of attributes in
a single message exchange. Assembly Instances supported by
the RETA-01 are listed and defined in chapter Communication,
page 55.
ODVA output attributes
This section briefly describes the instances found in the ODVA
AC/DC Drive Profiles output assemblies. Not all attributes listed
here will be supported by all output assembly instances.
Run Forward & Run Reverse (Control Supervisor Object)
These attributes are used to assert run and stop commands to
Control Supervisor Object state machine according to the
following table.
Table 9. Run/Stop event matrix
Fault Reset (Control Supervisor Object)
This attribute resets a drive fault on a transition from zero to one if
the condition that caused the fault has been cleared.
RunFwd RunRev Trigger event Run type
0 0 Stop N/A
0 ! 1 0 Run RunFwd
00 ! 1 Run RunRev
0 ! 10 ! 1 No action N/A
1 1 No action N/A
0 ! 1 1 Run RunRev
10 ! 1 Run RunFwd
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