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11/21/2019 TR - ECE - BA - GB - 0139 - 02 Page 143 of 154
9.2 PROFINET Diagnose-Alarm
PROFINET supports an integrated diagnostic concept, which enables efficient error detection and
elimination. When an error occurs, the defective IO device generates a diagnostic alarm on the IO
controller. This alarm calls up a corresponding program routine in the controller program, in order to
react to the error.
Alternatively, the diagnostic information can also be manually acyclically read out directly from the IO
device via record index 0xE00C and displayed on an IO supervisor.
Alarms belong to the acyclic frames which are transmitted via the cyclic RT channel. They are also
identified by Ether type = 0x8892.
Errors and warnings are transmitted by the measuring system to the IO controller in the form of a so-
called Alarm Notification Request (alarm message).
The exact structure of the Alarm Notification Request can be found e.g. in the PROFINET
specification Application Layer protocol for decentralized periphery and distributed automation, order
no.: 2.722.
Errors (F) and warnings (W) are reported in the same way, but with different types error types.
For warnings, two warning levels are distinguished:
- W1 = warnings with need for action
- W2 = warnings considered advises
Diagnostic message / Meaning
Undervoltage
The supply voltage is below the tolerance
limit.
- The supply voltage range specified for
this article number must be
maintained.
Overvoltage
The supply voltage is above the tolerance
limit.
- The supply voltage range specified for
this article number must be
maintained.
Overtemperature
The output stage is overloaded and gets
too hot.
- The ambient temperature range
specified for this article number must
be maintained.
Parameter error
The module has detected a parameter
assignment error.
- Check measuring system
configuration; at least one module
must be configured.
- Check value range of scaling
parameters.
Mismatch of safety destination address
(F_Dest_Add)
A different F-destination address was
detected in the PROFIsafe
communication.
- Check the parameterization of the
PROFIsafe communication and the
address setting of the measuring
system.
Safety destination address not valid
(F_Dest_Add)
- Check the parameterization of the
PROFIsafe communication.
Safety source address not valid
(F_Source_Add)
- Check the parameterization of the
PROFIsafe communication.
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