Troubleshooting TMT84
36 Endress+Hauser
9.2 Displaying the device status on the PROFIBUS
®
PA
9.2.1 Display in the operating program (acyclical data transfer)
The device status can be queried using an operating program, see chapter 11.2.3: EXPERTS È
DIAGNOSTICS È STATUS).
9.2.2 Display in the FieldCare diagnostic module (acyclical data trans-
fer)
Using the startup screen of an online connection to the device, the general device status as per
NAMUR NE107 can be quickly determined. All diagnostic messages for the measuring point have
been classified into four categories (Failure, Function Check, Out of Specification, Maintenance
Required), thereby providing the user with information on the cause and possible corrective
measures. If there is no diagnostic message, the status signal "ok" appears.
The graphic shows a failure caused by a line break at sensor 1:
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 transfer.
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
Chap. 9.3
Other errors (application errors without messages)
Some other error has occurred. Possible causes and remedial measures Chap. 9.4
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