The following table lists the ERR (error) LED indicators.

Table 3. ERR LED Indicators
LED Color LED Pattern Indication
Red Off There is no error.
Continuously blinks There is an invalid configuration from an unsupported module, bad device profile, object dictionary, or configuration.
Blinks once and pauses There is an unsolicited change and the NI-9145 or module is in an emergency condition.
Blinks twice and pauses There is an application watchdog timeout. The slave did not receive a scheduled EtherCAT telegram.
Solid There is a Process Data Interface (PDI) watchdog timeout. The slave failed to transfer I/O data in scheduled time.
Flickering There is a booting error from corrupt firmware or a hardware error.