Proline Promag 55 PROFIBUS DP/PA Troubleshooting
Endress+Hauser 123
Fieldbus connector • Check pin assignment/wiring ä 50
• Check connection between connector/fieldbus port.
Is the coupling ring tightened correctly?
Fieldbus voltage Check that a min. bus voltage of 9 V DC is present at terminals 26/27.
Permissible range: 9 to 32 V DC
Network structure PROFIBUS DP ä 36
PROFIBUS PA ä 37
Basic current Is there a basic current of min. 11 mA?
Bus address Check bus address: make sure there are no double assignments
Bus termination
(Termination)
Has the PROFIBUS network been terminated correctly?
Each bus segment must always be terminated with a bus terminator at both ends (start and
finish). Otherwise there may be interference in communication.
Current consumption,
permitted feed current
Check the current consumption of the bus segment:
The current consumption of the bus segment in question (= total of basic currents of all bus
users) must not exceed the max. permissible feed current of the bus power supply.
Æ
System or process error messages
System or process errors which occur during commissioning or operation can be displayed in the ACTUAL SYSTEM
CONDITION function via the local display or an operating program (e.g. FieldCare).
Æ
Other error (without error message)
Some other error has
occurred.
Diagnosis and rectification ä 133
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