Promag 53 PROFIBUS DP/PA Troubleshooting
Endress+Hauser 131
Faulty connection to control system (continued)
Fieldbus connector
(only for PROFIBUS PA)
• Check pin assignment/wiring
• Check connection between connector/fieldbus port.
Is the coupling ring tightened correctly?
Fieldbus voltage
(only for PROFIBUS PA)
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 Check permissible fieldbus length and number of spurs.
Basic current
(only for PROFIBUS PA)
Is there a basic current of min. 11 mA?
Bus address Check bus address: make sure there are no double assignments
Bus 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.
Power consumption,
permitted feed current
(only for PROFIBUS PA)
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.
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System or process error messages
System or process errors which occur during commissioning or operation can also be displayed in the
manufacturer-specific device controls using the FieldCare operating program.
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Other error (without error message)
Other errors are present Diagnosis and rectification → 144
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