9 Trouble-shooting Promag 53 PROFIBUS-DP/-PA
114 Endress+Hauser
Faulty connection to control system
No connection can be made between the control system and the device.
Check the following points:
Supply voltage
Transmitter
Check the supply voltage
→ terminals 1/2
Device fuse Check device fuse
→ Page 127
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 the data lines: A = terminal 26, B = terminal 27
Field bus connector
(only for PROFIBUS-PA,
option)
– Check pin assignment/wiring
→ Page 62
– Check connection between connector/fieldbus port.
Is the coupling ring tightened correctly?
Field bus 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 46
Base current
(only for PROFIBUS-PA)
Is there a basic current of min. 11 mA?
Bus address Check bus address: make certain that 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 communi-
cation.
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.
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 115
Other error (without error message)
Some other error has
occurred.
Diagnosis and rectification
→ Page 121
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