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10
Troubleshooting in the event of faults
Faults during operation in the JUMO digiLine or Modbus mode
In the event of bus faults in JUMO digiLine or Modbus systems, check the following items:
•
All plug-in and terminal connections in the bus must be made correctly and be tight. As long as bus
communication in general is not disrupted (e.g. as the result of disconnected or short-circuited bus
cables or missing terminating resistors), JUMO digiLine electronics which have been disconnected
from the bus can be identified within the "Reference table" for the device software of the the JUMO
AQUIS touch S/P. Further information in this regard can be found in the operating manual of the re-
spective device.
•
The ends of bus cables with line topology must have terminating resistors or terminating connectors
(part no. 00461591). Stub lines do not require termination.
•
The bus voltage supply must be intact and stable (cf. chapter 6 "Electrical connection", page 33 and
chapter 14.3 "Electrical data", page 68).
10 Troubleshooting in the event of faults
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