HEIDENHAIN PROFIBUS-DP (DPV2) - Manual (Page 69)

Functionality in the PROFIBUS DPV2 device
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8.5 Alarm channel control
This parameter enables or disables the encoder specific Alarm
channel transferred as Channel Related Diagnosis. This
functionality is used to limit the amount of data sent in
isochronous mode.
If the value is zero (default value) only the communication related
alarms are sent via the alarm channel. If the value is one (1) also
encoder profile specific faults and warnings are sent via the alarm
channel.
Attribute Meaning Value
Enable Profile specific diagnosis is switched on 1
Disable No profile specific diagnosis(default) 0
Table 35 Alarm channel control attributes