Index
GFK-2839B PAC8000* IO PROFINET Scanner User’s Manual–September 2017 11
FAULT LED
The FAULT LED remains OFF during normal operation when no PROFINET Diagnosis
conditions are present on the PNS itself or any IO module in the node. When a PROFINET
Diagnosis condition exists, the FAULT LED turns solid red. When all diagnosis conditions
have disappeared, the FAULT LED is OFF.
The FAULT LED blinks red (0.5 seconds ON/0.5 seconds OFF) if any of the MAC addresses
read from non-volatile memory on power-up are invalid. The PNS remains disconnected from
the Ethernet network if any of its MAC addresses are invalid.
Missing or mismatched IO modules in the PNS node do not affect the PNS FAULT LED.
LAN LED
The LAN LED blinks ON when the PNS module is actively processing Ethernet packets
(Tx/Rx). The LAN LED is OFF if there is no activity.
Port LEDs (10/100 Mbps and Link/Activity)
The two Port LEDs indicate link connection and link activity on the Ethernet ports. If a PORT
LED is solid ON, the port is connected but is not currently receiving or transmitting Ethernet
frames. A Port LED blinks when Ethernet frames are actively being transmitted or received.
USB LED
The USB LED is OFF when a USB connection is not established and ON when the link with a
computer is ready. The USB LED flashes when there is traffic such as Winloader activity on
the port.
I/O COMM
This LED turns ON when all IO module commands were successful in the last two seconds. It
blinks when at least one IO module command failed in the last two seconds. It remains OFF
when no IO module command was sent in the last two seconds.
A-B LINK
This LED is reserved.
1.4.2 Power Supplies
The PAC8000 PROFINET Scanner can be connected with either one power supply or dual
redundant power supplies. If two power supplies are installed, they serve as redundant
backups for each other.
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