X20 system modules • X20 interface module communication • X20IF1051-1
X20 system User's Manual 3.10
1785
4.23.6.4 LED status indicators
Figure
LED
Color
Status
Description
Green/red
Off
No power to module
Green
On
PCI bus communication in progress
READY/RUN
Red
On
Communication on the PCI bus has not yet been started
Green/red
Off
Module supply not connected or module is not online
Blinking
Module is online but the I/O connection is not active
Green
On
Module is online and the I/O connection is active ("operating")
Blinking
The red LED blinks if at least one of the following errors has occurred:
•
Minor fault (recoverable fault)
•
Connection error
•
No DeviceNet supply voltage
MOD/NET
Red
On
Critical fault or critical connection error (double MAC ID, bus failure or module
defect)
TxD
Yellow
Flickering or
on
Module sending data via the DeviceNet interface
TERM
Yellow
On
Terminating resistor integrated in the module switched on
4.23.6.5 Operating and connection elements
LED status indicators
IF1 - DeviceNet
Terminating resistor switch
on the bottom of the module
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