Chapter 11
186
Envizio Pro™ and Envizio Pro II® Installation and Operation Manual
GPS Error Messages
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.
Refer to the Raven CANbus Network Installation Manual for detailed troubleshooting procedures and
information.
Issue
Possible Cause
Solution
Guidance Not
Available
• Displays when starting a
job without a GPS signal
• Make sure a GPS receiver is connected to the field
computer and that the receiver is powered up, then select
Auto-Detect.
• Make sure the correct GPS Source is selected (Tools
Menu>GPS menu>Source)
No Differential
• Differential GPS has not
been detected by the
field computer
• Check the GPS receiver to make sure that it has the
differential correction function. Contact the manufacturer for
additional information.
No GPS
• Field computer does not
detect a GPS signal
• Make sure that the GPS receiver is turned on and receiving
a signal.
• Make sure that the port setting for the field computer and
the GPS receiver match.
• Make sure that the required NMEA messages are turned on
in the GPS receiver.
High HDOP
• Satellite constellation
issue
• There is no issue with the DGPS system or cabling. Wait for
the constellation issue to resolve before continuing job.
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