9 Trouble-shooting PROline Prosonic Flow 93 PROFIBUS-DP/-PA
124 Endress+Hauser
Faulty connection to control system
No connection can be made between the control system and the flowmeter.
Check the following points:
Supply voltage
Transmitter
Check supply voltage
Terminal 1/2 (Page 49)
Device fuse Check device fuse
Page 140
85...260 V AC: 0.8 A slow-blow / 250 V
20...55 V AC and 16...62 V DC: 2 A slow-blow / 250 V
Fieldbus connection PROFIBUS-DP:
Check data line: Terminal 26 = B, Terminal 27 = A (Page 49)
PROFIBUS-PA:
Check data line: Terminal 26 = PA+, Terminal 27 = PA– (Page 49)
Fieldbus connector
(only for PROFIBUS-PA,
option)
– Check pin assignment/wiring
Page 50
– 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 ... 32 V DC
Network structure Check permissible fieldbus length and number of spurs:
PROFIBUS-DP
Page 41 ff.
PROFIBUS-PA
Page 44 ff.
Basic current Is there a basic current of min. 11 mA?
Bus address Check bus address: Ensure there are no double-assignments
Terminators 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 interference may affect
communication.
Current consumption
Permissible 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 fieldbus stations) must not exceed the max. permissible
feed current of the fieldbus power supply.
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System or process error messages
System or process errors which occur during commissioning or during a measuring operation can also
be displayed in the manufacturer-specific device controls using the Commuwin II operating program
Page 125 ff..
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Other error (without error message)
Some other error has
occurred.
Diagnosis and rectificationPage 135
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