Status LEDs

Bus Probes feature two status LEDs — greed and red. LED patterns of Bus Probes conform to Tibbo's standard LED patterns used on our programmable devices.

Here is the list of LED patterns supported by BP sensors:

During the device boot, after the Monitor/Loader (M/L) verifies the integrity of the application firmware:

Pattern	Description	Meaning
	Green and red LEDs blinking in turns at high speed	Application firmware is not loaded or corrupted

When the M/L is in the firmware update mode:

Pattern	Description	Meaning
	Green LED is permanently on	The M/L is ready to receive a file
	Green LED is flickering unevenly	The M/L is receiving a file
	Green LED blinking at slow speed	XModem file upload completed successfully
	"One long + one short" red LED pattern	Communications error during the XModem file upload
	"One long + two short" red LED pattern	The file is too large
	"One long + three short" red LED pattern	FLASH memory failure
	"One long + four short" red LED pattern	The file is invalid (that is, contains invalid data)

When the application firmware is executing:

Pattern	Description	Meaning
	Green LED blinks once	Bus Probe sensor has received a Modbus request with correct checksum
	Red LED blinks once	Bus Probe sensor has received a Modbus request with incorrect checksum

When the M/L updater firmware is executing:

Pattern	Description	Meaning
	Red LED is permanently on	The Probe is preparing to update the M/L. Do not turn off the power.
	Green LED is flickering unevenly, red LED permanently on	The Probe is updating the M/L. Do not turn off the power.
	"Two short" green LED pattern	The M/L has been updated. You can now safely turn off or power-cycle the Probe.