25
ICC
7.
LED Indicators
The gateway contains several different LED indicators, each of which conveys
important information about the status of the unit and connected networks. These
LEDs and their functions are summarized here.
7.1
Module/Network Status
The gateway has two dichromatic, stacked LEDs to indicate the status of the
module (MS) and the status of the Ethernet/IP network server driver (NS). On
startup, the LEDs blink a startup sequence: green-red-green-red. Always confirm
this sequence upon powering the gateway to ensure the device is functioning
properly. Refer to Table 1 and Table 2 for further details.
Table 1: Module Status LED
LED State
Indication
Off
No power
Green
Gateway has power and is functioning normally
Flashing Green
The gateway has established a USB connection
Flashing Red
A fatal error has occurred. The number of sequential
blinks (followed by 2 seconds of OFF time) indicates
the error code.
Alternating Red/Green
Startup sequence
Table 2: EtherNet/IP Network Status LED
LED State
Indication
Off
No IP address / no power
Green
Gateway has an IP address, one or more EtherNet/IP
connections are established with a client
Flashing Green
Gateway has an IP address, no EtherNet/IP
connections established with a client
Red
Critical link failure / duplicate IP address
Flashing Red
One or more EtherNet/IP connections timed-out
Alternating Red/Green
Startup sequence