BEAT (Heartbeat) LED

In normal operation, the yellow heartbeat BEAT LED blinks at 1 Hz, with a 50%/50% on/off duty cycle.

After power is applied, during bootup, the “BEAT” LED flashes at a 1 Hz rate, at 50%/50% on/off duty cycle. The bootup process status is indicated by blink patterns as described in the table below.

JACE-9000 BEAT (heartbeat) LED blink pattern

Pattern Blink pattern System state Niagara daemon Station
A 200ms on / 200ms off system up niagarad starting no station running
B 200ms on / 1000ms off system up niagarad running no station running
C 1000ms on / 1000ms off system up   station running
 CAUTION: Do not remove power from the controller during bootup or during other critical operations, such as firmware upgrade to the controller or any attached modules. . 

If the BEAT LED stays on constantly, does not light, or blinks very fast, contact System Engineering for technical support.