Chapter 10 Troubleshooting
: Full closed-loop excessive deviation
Potential Cause Checking Method Corrective Actions
The position control
deviation value of
full-closed loop
exceeds the
specified limit.
Maximum deviation
parameter setting is
too small.
1. Check if the setting value of P1-73 is
too small.
2. Check if all connections are tight and
well-connected to the mechanical
equipment.
1. Increases the parameter
setting value of P1-73.
2. Ensure all connections are
tight and well-connected to
the mechanical equipment.
: DSP firmware upgrade
Potential Cause Checking Method Corrective Actions
EE-PROM is not reset
after the firmware
version is upgraded.
Check if EE-PROM is reset after the
firmware version is upgraded.
Set P2-08 to 30 first, and then
28 next, and restart the servo
drive.
CANopen Communication Fault Messages
: CANbus error
Potential Cause Checking Method Corrective Actions
CANbus off or Error
Rx/Tx Counter
exceeds 128.
1. Examine CANbus communication
cable.
2. Check if the communication quality is
good quality state. (It is recommended
to use shielded cables and use
common grounding.)
NMT Maser send “Reset
node“ command to its slave or
restart the servo drive.
: CANopen SDO receive buffer overrun
Potential Cause Checking Method Corrective Actions
SDO Rx buffer
overrun is detected
(receive two or more
SDO packets in
1ms).
Check if the servo drive (Master)
receives
two or more SDO packets in 1ms.
NMT Maser send “Reset
node“ command to its slave or
reset the fault by sending the
control word (0x6040)
through
CAN communication (the value
of CANopen object 0x6040
should be reset)
Revision January 2011 10-15
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales
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