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Chapter 2: Overview
2.7.6 USB 2.0 Module Status
The USB 2.0 module has a multicolor LED on both sides to indicate overall status. It also has two more LEDs on the back side to
indicate the connection status.
CPU module, rear view
CON module, rear view
Status USB 2.0 module.
LEDs 1 and 2: Status.
Position
LED
Status
Description
1
Failure LED (green)
Off
Connection available
On or flashing
Connection failure (flashing for about 20 seconds following a connection failure)
2
Status LED (green)
Off
No connection via interconnect cable
On
Connection available
LED 3: USB 2.0 Status.
LED color
Description
Red
Device ready
Green
Only connection available, no USB 2.0 signal
Green/light blue flashing
Connection available, no USB 2.0 device connected (only CON unit)
Light blue
Connection and USB 2.0 signal available (operating status)