Troubleshooting
Proline Promag 53 PROFIBUS DP/PA
136
Hauser
Fieldbus connection
PROFIBUS PA: Check data line
Terminal 26 = PA +
Terminal 27 = PA -
PROFIBUS DP: Check data line
Terminal 26 = B (RxD/TxD-P)
Terminal 27 = A (RxD/TxD-N)
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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
