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Manual No. 016-0171-148 173
Troubleshooting
11
CAN Troubleshooting
Although the control algorithm is located within the CAN node, all of the same troubleshooting techniques used
in a traditional hard-wired system still apply to a CAN system. CAN allows for modularization of the control
system, but the behavior of the system remains the same. Flow and speed sensors, as well as the control
valve and boom valves, are used in the same fashion. Below are some common causes for communication
failures:
Issue Possible Cause Solution
CANbus cannot
read the product
node
• The node is not
connected to the CANbus
• Connect the node and re-initialize the field computer to read
the product node.
• Node is not properly
powered
• Connect the clean power - 16 gauge red wire and high
current power - 12 gauge red wire from the product node to
a 12V DC power source that is capable of supplying power
to all nodes connected to the CANbus system
• Node is not properly
grounded
• Connect the clean ground - 16 gauge white wire and the
high current ground - 12 gauge white wire to a good, quality
ground source. Raven recommends grounding the wires to
the negative terminal of the battery.
• The nodes share power
and ground connections
• Make sure that each node has a separate power and
ground connection.
• CANbus ends not
terminated
• Make sure that both ends of the CANbus system are
properly terminated. Refer to the Raven CANbus Network
Installation Manual for information on properly terminating
the CANbus network.
• Corroded pins in
CANbus connections
• Check CANbus cable connectors for any highly corroded
pins.
• Ensure dielectric grease has been applied to all cable
connections exposed to weather and field conditions.
• Moisture in connection
• Check CANbus cable connectors for any corroded pins.
• Ensure dielectric grease has been applied to all cable
connections exposed to weather and field conditions.
• Connectors not seated
properly
• Check that all CANbus cable connectors are inserted fully
(until the locking tab is engaged).
• Be sure to remove any moisture in connections which were
not properly seated. Check for corroded pins and apply
dielectric grease when reconnecting CANbus cables.