22
Service LED
Patterns and
Descriptions
Service LED Pattern Descriptions
LED Pattern Operation Description
Continuously ON Power-up of Neuron 3120xx
chip-based node or Neuron
3150 chip-based node with
any PROM
Use EEBLANK and follow
reinitialization procedure.
Continuously OFF Power-up of Neuron 3120xx
chip-based node or Neuron
3150 chip-based node with
any PROM
Indicates bad node hardware.
ON for one second at power-
up followed by approximately
2 seconds OFF, then stays
ON
Power-up/Reset May be caused by Neuron
chip firmware when mismatch
occurs in application
checksum.
Short flash every 3 seconds Anytime Indicates watchdog timer
resets occurring.
Possible corrupt EEPROM.
For Neuron 3150 chip-based
node, use EEBLANK and
follow reinitialization
procedure.
Flashing at 1 second intervals Anytime Indicates node is unconfigured
but has an application.
Proceed with loading node.
Brief flash at power-up. OFF
duration approximately 10
seconds after which stays ON
Using EEBLANK or Neuron
3150 chip-based node
Indicate completion of
blanking process.
Brief flash at power-up. OFF
duration approximately 1 to 15
seconds, depending on
application size and system
clock. LED then begins
flashing at 1 second intervals.
First power-up with new
PROM on Neuron 3150 chip-
based custom node.
Unconfigured firmware state
exported.
Indicates unconfigured state.
Brief flash at power-up
followed by OFF
Node is configuring and
running normally.
