Trouble-shooting Proline Promass 83 PROFIBUS DP/PA
120 Endress+Hauser
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 ... 32 V DC
Network structure Check permissible fieldbus length and number of spurs. → Page 26
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
Terminating resistors 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 they 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)
Some other error has
occurred.
Diagnosis and rectification
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