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11.10.8 Troubleshooting
There are two indicators on top of the CANopen communication module; when malfunction occurs,
the cause of the malfunction can be confirmed based on the indicator statuses, and troubleshoot
the error by following the descriptions below.
Indicator troubleshooting
Module status LED (RUN LED)
Indicator
statuses
Status name Troubleshooting method
Does not
light up
Power not supplied to
the communication
module
1. Confirm whether the driver power is normal.
2. Confirm whether the power terminal of the
communication module is connected to the
driver.
Error status LED (ERR LED)
Indicator
statuses
Status name Description
Single
flash
CANopen packet error
Poor connection quality with the CANopen host
terminal or host not connected when powered
on. Continue transmission or power off
inspection can be selected. Two results can be
expected with continue transmission 1) Packet
transmission returns to normal and the red light
no longer flashes 2) Packet continues to have
errors causing disconnection. When the power is
off, check whether the TB1 terminal and cable
are firmly connected, and whether the
transmission rate, maximum transmission
distance and cable length comply with ODVA
specifications.
Double
flash
Guard/Heartbeat error
User sends periodic heartbeat messages. If a
message is not received after a specific time,
please disconnect the power and check the
connection status of that node.
Red light
lights up
Disconnected
Cannot connect with the CANopen host
terminal; disconnect the power and check
whether the TB1 terminal and cable is firmly
connected, and whether the transmission rate,
maximum transmission distance and cable
length comply with ODVA specifications.
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