Aventics DDL Instrucciones De Servicio página 57

AVENTICS | DDL, DDL-E | 1987765499–BDL–001–AC
Table 13:
1)
Explanation
of table 13
Bit 1 = 0 (default)
When switching on the system, there are no messagesas
to which coils are available. Diagnostic messages are
only sent if the output is addressed. If an output is
addressed, where no coil is available, a diagnostic
message will be generated.
Bit 1 = 1
The number of available coils is determined when the
system is switched on. This information is transferred to
the controller that can compare it to the stored system
configurations. Thus, missing coils can be determined
when the system is switched on. Diagnostic messages
are only sent during cyclical operation when
configuration changes have occured. The entire diagnosis
area is transferred.
2)
Bit 3 = 0 (default)
If the DDL fails, the DDL participants' output data will be
set to 0.
Bit 3 = 1
If the DDL fails, the DDL participants' output data will be
stored and the coils further controlled (freeze values).
Bus coupler parameters
Bit status Parameter name/meaning
Bit 0 not assigned
Bit 1 coils diagnostic message
0 for controlled outputs (default)
1 for changes
Bit 2 not assigned
Bit 3 reaction to DDL failure
0 values set to 0 (default)
1 freeze values
Bit 4 ... 7 not assigned
Coils diagnostic message
Reaction to DDL failure
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Diagnostic
1)
2)