ACC-72EX User Manual
Diagnostics
115
PROFINET IO
– Device – OPT91
The following table describes the meaning of the LEDs for the comX Real-Time Ethernet communication
modules (COMX-CA-RE/ COMX-CNRE) when the firmware of the PROFINET IO-RT-Device protocol
is loaded to the comX communication module:
SF LED (COM0)
Color
State
Meaning
Red
On
Watchdog timeout; channel, generic or extended diagnosis present; system
error
Red
Flashing cyclic with 2Hz
(for 3 seconds)
DCP signal service is initiated via the bus
Red
Off
No error
BF LED (COM1)
Color
State
Meaning
Red
On
No configuration; or low speed physical link; or no physical link
Red
Flashing cyclic with 2Hz
No data exchange
Red
Off
No error
LINK LED
Green LED on ETH0 / ETH1 connectors
Color
State
Meaning
Green
On
A connection to the Ethernet exists
Green
Off
The device has no connection to the Ethernet
ACT LED
Yellow LED on ETH0 / ETH1 connectors
Color
State
Meaning
Yellow
Flashing
The device sends/receives Ethernet frames