Beckhoff EL6731 Documentation page 124

Parameterization and commissioning
Header Byte
Bit Meaning
0-5 Length of the associated diagnostic data, including header byte
6-7 0 = manufacturer-specific diagnosis (DPV1 is not supported) or DPV1 diagnosis (DPV1 is
supported (DPV1_Enable = 1) in associated GSD file)
Module diagnosis
Channel diagnosis
Revision number
Manufacturer-specific diagnosis
The structure of the manufacturer-specific diagnosis may be found in the documentation for the DP slave.
DPV1 Diagnosis
In the case of DP slaves that also support DPV1, the DPV1 diagnosis, in which a distinction is made
between status messages and alarms, is sent instead of the manufacturer-specific diagnosis.
Byte Meaning
0 Header-Byte (bits 6,7 = 0, bits 0-5 = 4..63)
1 Bit 0-6: Alarm type
Bit 7:
0: Alarm
1: Status
2 Slot number (0-254)
3 Bit 0-1: Alarm specifier
Bit 2: Additional acknowledge
Bit 3-7: Sequence number
4-63 Manufacturer specific (see the documentation for the DP slave)
Alarm type
Value Meaning
0 reserved
1 Diagnostic alarm
2 Process alarm
3 Withdrawal alarm
4 Insertion alarm
5 Status alarm
6 Update alarm
7-31 reserved
20-126 Manufacturer specific (see the documentation for the DP slave)
127 reserved
Module diagnosis
The module diagnosis contain one bit for each DP module. The bit indicates whether a diagnosis for the
corresponding DP module is present.
124 Version: 2.8 EL6731