CM592CommState (GVL)

Value definitions for communication state of PROFIBUS master

Attributes:

qualified_only

InOut:

Name	Type	Initial	Comment
COMMSTATE_OFFLINE	USINT	0	In OFFLINE state, there is no communication (data transfer) permitted at all. This is the state after initialization. This means, the master is waiting for a signal to start and does not participate in the token ring of the PROFIBUS access control mechanism
COMMSTATE_STOP	USINT	16#40	In STOP state, there is no data transfer permitted between master and slaves. Data transfer to other masters in multi- master system is allowed, however. The bus parameter set has been loaded successfully in order to get into STOP state
COMMSTATE_CLEAR	USINT	16#80	In CLEAR state, the master is able to read the input data from the DP slaves. The master forces the outputs to the slaves to be in a safe state (i.e. they contain only the value 0). For instance, incorrect data transfer of a slave can cause the PROFIBUS DP master to fall back from OPERATE state to CLEAR state. Parameterization and configuration checks are possible in this state
COMMSTATE_OPERATE	USINT	16#C0	In OPERATE state, unrestricted data transfer is possible. This data transfer is cyclic, i.e. periodically, the input values are read from the slaves and the output data are written to the slaves.