Endress+Hauser iTEMP TMT85, Руководство по эксплуатации

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iTEMP TMT85 Diagnostics and troubleshooting
Hauser 37
9 Diagnostics and troubleshooting
9.1 Troubleshooting
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.
Due to its design, the device cannot be repaired. However, it is possible to send the
device in for examination. See the information in the "Return" section. →  47
Check display (optional, attachable LC display)
Display is blank 1. Check the supply voltage at the head transmitter → ter and -
2. Check whether the retainers and the connection of the display module are correctly
seated on the head transmitter, Section 4.2. →  15
3. If available, test the display module with other suitable E+H head transmitters
4. Display module defective → Replace module
5. Head transmitter defective → Replace transmitter

Onsite error messages on the display
→  39

Faulty connection to the fieldbus host system
No connection can be made between the fieldbus host system and the device. Check the following points:
Fieldbus connection Check the data cable
Fieldbus connector (optional) Check the pin assignment/wiring,
Fieldbus voltage 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
Basic current Is there a basic current of min. 11 mA?
Terminating resistors Has the FOUNDATION Fieldbus H1 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. permitted feed current
of the bus power supply unit.
Error messages in the FF configuration system
→  39