Flowserve URB 2 - Manual (Page 36)

36
Malfunctions
Causes
Note
Before carrying out the systematic fault finding procedure please check:
Wiring:
Is the wiring in accordance with the wiring diagram?
Is the polarity of the bus line always correct?
Is the bus line of each of the end nodes provided with a 20 Ω resistor?
Node ID:
Are the node IDs set correctly?
Note that a node ID must only be used for one item of equipment!
Baud rate:
Is the length of the cable in accordance with the adjusted baud rate?
(The URB 2 gives an acoustic signal if the baud rate setting is incorrect.)
Is the baud rate the same for all devices?
Malfunctions occur if CAN bus components have been mounted or configured incorrectly or if
electronic component parts are defective, or in the event of excessive heat in the equipment or
electrical interference in the supply system.
Further malfunctions are:
■
Faulty communication within the CAN-Bus system
■
Overloading of the 24 V power supply unit in the controller
Attention
For more information on system malfunctions refer to the installation manuals of the
connected equipment.