6 | Connection
STÖBER
16
09/2019 | ID 442637.01
6.5
LED display
STOBER drive controllers feature diagnostic LEDs that visualize the state of fieldbus communication and the states of the
physical connection.
6.5.1
CAN status
There are 2 LEDs on the top of the drive controller that provide information about the connection between the CANopen
master and slave and about the state of the data exchange. This information can also be read out in parameter A245 CAN
diagnostic.
2
1
On/Off
Fig. 3: LEDs for the CAN status
1
Green: Run
2
Red: Error
Green LED
Behavior
NMT state
Description
Off
Init
No error, no warning
Flashing
Pre-operational
The drive controller is ready for
parameterization for preparing the actual
operation.
1x flash
Stopped
All communication activities have stopped.
On
Operational
The CAN bus is activated, all services are in
operation.
Tab. 3: Meaning of the green LED (run)
Red LED
Behavior
Error
Description
Off
No error, no warning
No error
1x flash
Communication error in
the operational state
(Warning level)
Check the bus cables, shielding and
compliance with the CAN specifications
regarding this.
2x flash
Node guard event
Check the node guard function of the
controller.
3x flash
SYNC error
Check the SYNC configuration of the
controller.
On
Bus off
The SD6 in question is no longer participating
in the CAN communication. Check the baud
rate and bus cables and switch the drive
controller off and on again.
Tab. 4: Meaning of the red LED (error)