Fault Tracing; Typical Fault Conditions - Honeywell BacNet protocol Installation And User Manual

Fault tracing

7. Fault tracing
When an unusual operating condition is detected by the VFD control diagnostics, the drive ini-
tiates a notification visible, for example, on the keypad. The keypad will show the ordinal num-
ber of the fault, the fault code and a short fault description.
The fault can be reset with the Reset button on the control keypad or via the I/O terminal. The
faults are stored in the Fault history menu which can be browsed. The different fault codes you
will find in the table below. This fault table presents only the faults related to the fieldbus in use.
7.1

Typical fault conditions

Fault condition
Termination
Missing or excessive termination resistor.
resistor
•
Cabling
•
•
Grounding Inadequate grounding.
Faulty connections.
•
Connections •
•
•
•
Parameter
•
•
Possible cause
Supply or motor cables are located
too close to the fieldbus cable
Wrong type of fieldbus cable
Too long cabling
Excessive stripping of cables
Conductors in wrong terminals
Too loose connections of conduc-
tors
Faulty address
Overlapping slave addresses
Wrong baud rate
Wrong control place selected
Table 17. Typical fault conditions
Remedy
Install termination resistors
at both ends of the fieldbus
line.
Ensure grounding in all
points on the net
Honeywell • 32