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10.3 LED Status
On-board status LEDs are available for troubleshooting purposes on many of the Advanced modules.
10.3.1 AX-CTL Base Card
LED Function Description
1 Heartbeat LED – PSU Normal: Flashes at 1Hz
2 Heartbeat LED – Main Microprocessor Normal: Flashes at 1Hz
3 Serial Expansion Card
ON = Serial Expansion Card Connected
4 USB
ON = USB Connected
5 PBUS Communications – Transmit Flashes when data transmitted to PBUS modules
6 PBUS Communications – Receive Flashes when data received from PBUS modules
7 Heartbeat LED – SLC #1 Flashes when communicating on the SLC
8 Heartbeat LED – SLC #2 Flashes when communicating on the SLC
9 Serial Communications – Transmit
Flashes when data transmitted
10 Serial Communications – Receive
Flashes when data received
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Applies to USB, RS232 and Serial Expansion Circuits.