STOBER 13 | Diagnostics
02/2019 | ID 442728.05
173
13.2.1 Fieldbus state
The LEDs for the diagnostics of the fieldbus state vary depending on the implemented fieldbus
system or communication module.
13.2.1.1 EtherCAT state
There are 2 LEDs on the front of the drive controller that provide information about the
connection between EtherCAT master and slave and about the state of the data exchange. This
information can also be read out in parameter A255 EtherCAT Device State. If the drive
controller includes the SY6 safety module, the STO and SS1 safety functions are activated over
EtherCAT FSoE. In this case, an LED on the front of the device provides information about the
FSoE state.
Fig.35: LEDs for the EtherCAT state
1 Red: Error
2 Green: Run
Red LED Behavior Error Description
Off No Error No error
Flashing Invalid Configuration Invalid configuration
1x flash Unsolicited State
Change
The EtherCAT slave changed
operating states by itself
2x flash Application
Watchdog Timeout
The EtherCAT slave did not receive
new PDO data during the configured
watchdog timeout
Tab. 170: Meaning of the red LED (error)
Green LED Behavior Operating state Description
Off Init No communication between the
EtherCAT master and slave; the
configuration starts, saved values are
loaded
Flashing Pre-operational No PDO communication; the
EtherCAT master and slave exchange
application-specific parameters via
SDOs
1x flash Safe-operational The EtherCAT slave sends the current
actual values to the EtherCAT master,
ignores its reference values and refers
to internal default values
On Operational Normal operation: The EtherCAT
master and slave exchange reference
and actual values
Tab. 171: Meaning of the green LED (run)
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