RID14
Troubleshooting
Hauser
31
10
Troubleshooting
10.1 Troubleshooting instructions
In the event of a serious fault, an indicator might have to be returned to the
manufacturer for repair. Follow the instructions in → 35 before returning the
indicator.
Always start troubleshooting with the checklists below if faults occur after start up or
during operation. This takes you directly (via various queries) to the cause of the problem
and the appropriate remedial measures.
Check local display
No display visible - No
connection to the fieldbus
host system
• For fault elimination, see below: ’Faulty connection to the fieldbus host system’
• Other possible causes of errors:
– Electronics module defective → Test with spare electronics module → Order
spare part
– Housing (internal electronics) defective → Test with spare housing → Order
spare part
• Field indicator defective → Replace indicator
No display visible -
However, connection
established to the fieldbus
host system
• Check whether the display module is correctly connected to the electronics
module
• Display defective → Test with spare display → Order spare part
• Electronics module defective → Test with spare electronics module → Order spare
part
↓
Faulty connection to the fieldbus host system
No connection can be made between the fieldbus host system and the indicator. Check the following points:
Fieldbus connection
Check the data cable
Fieldbus connector
(optional)
Check pin assignment / wiring → 15
Feldbus-Spannung
Check that a min. bus voltage of 9 V
DC
is present at the +/- terminals. Permitted
range: 9 to 32 V
DC
Network structure
Check permissible fieldbus cable length and number of spurs → 17
Basic current
Is there a basic current of min. 11 mA?
Terminating resistors
Has the PROFIBUS PA segment 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 data transmission.
Current consumption
Permissible feed current
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 unit.
Error messages in the PROFIBUS® PA configuration system
See section "Status messages" → 32
↓
Other errors (application errors without messages)
Some other error has
occurred.
Possible causes and remedial measures see section "Status messages" → 32
