JACE-9000 Status LEDs
The JACE-9000 provides a number of status LEDs and a heartbeat LED. All but one are visible with the front access door closed.
Figure 8. JACE-9000 LEDs and brief descriptions
| 1 | RS485 A (COM1): Transmit (TX, Yellow) and Receive (RX, Green). Refer to “RS485 LEDs.” |
| 2 | RS485 B (COM2): Transmit (TX, Yellow) and Receive (RX, Green). Refer to “RS485 LEDs.” |
| 3 | STAT (Green): Remains lit. Refer to “STAT (Status) LED.” |
| 4 | BEAT (Yellow): Heartbeat LED that blinks at 1Hz during normal operation. Refer to “BEAT (Heartbeat) LED.” |
| 5 | SEC Secondary Ethernet, (LAN2) Link (Green) and Activity (Yellow). See “PRI, SEC (Ethernet) LEDs.” |
| 6 | PRI Primary Ethernet (LAN1) Link (Green), Activity (Yellow). See “PRI, SEC (Ethernet) LEDs.” |
After applying power to the controller, LED and heartbeat blink patterns are provided to indicate the status of communication and operation of the JACE-9000. The following table provides a summary description of 3 different heartbeat blink patterns, describing what each pattern indicates regarding the current state of controller operating system (system snap), Niagara daemon (niagarad), and station.
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 |
LED blink patterns can change to indicate that a certain state has changed from running to stopped, or not running. For example:
- If a station is killed or stopped, the heartbeat pattern should change from pattern
Cto patternB. - If a station is started, or restarted, the heartbeat pattern should change to pattern
C.
NOTE: After Niagara daemon startup, niagarad is not monitored.