DEK高级培训资料 - 第96页
CAN bus troublesh ooting • Check Power supplie s using Power Mon itor • Look at the Event Log for clues • Check CCT breake rs • Determine which Nod e is causing the proble m. This can b e done u sing ISCAN* Issue 2: July…
Practical Exercise
•
Measure CAN bus line resistance:
– With CAN cable connected to Nextmove ES card =
60Ω (2x 120Ω in parallel)
– With CAN cable disconnected from Nextmove ES
Issue 2: July 2007
– With CAN cable disconnected from Nextmove ES
card = 120Ω
•
Disconnect +24V to a node and power on
machine
– What message is displayed?
Task: Complete the workbook tasks
CAN bus troubleshooting
•
Check Power supplies using Power Monitor
•
Look at the Event Log for clues
•
Check CCT breakers
•
Determine which Node is causing the problem.
This can be done using ISCAN*
Issue 2: July 2007
This can be done using ISCAN*
•
Test Can bus wires for continuity and
resistance
•
Check NextMove ES has initialised OK
•
Check voltages to Node(s)
ISCAN Healthcheck software
•
Intelligent Scaleable Control Area Network
•
Tests condition of each node on CAN bus
•
Provides diagnostic feedback regarding CAN
bus errors
Issue 2: July 2007
bus errors
•
Tests Firewire camera functionality
•
Tests Servo motor performance
•
Tests Linear motor encoder performance
•
Monitors Analogue and digital inputs and
outputs on each node