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13-2 Checking for Errors and Trouble-
shooting with the Indicators
You can check for errors in the EtherCAT Slave Terminal with the indicators on the EtherCAT Coupler
Unit and the NX Units. This section tells you about the errors that the indicators show and the trouble-
shooting procedures for them.
13-2-1 Checking for Errors and Troubleshooting with the Indicators on
the EtherCAT Coupler Unit
Indicators
Name
L/A IN
The L/A IN indicator shows the status of the inputs in EtherCAT communications.
L/A OUT
The L/A OUT indicator shows the status of the outputs in EtherCAT communications.
RUN
The RUN indicator shows the operating status of EtherCAT communications for the EtherCAT
Coupler Unit.
ERR
The ERR indicator provides information on errors in the EtherCAT Coupler Unit.
TS
The TS indicator gives the status of the EtherCAT Coupler Unit and the communications status
between the EtherCAT Coupler Unit and the NX Units.
UNIT PWR
The UNIT PWR indicator shows the status of the Unit power supply.
IO PWR
The IO PWR indicator shows the status of the I/O power supply.
Primary Errors That the Indicators Show and Troubleshooting Pro-
cedures
Here, the following abbreviations are used to describe the status of the indicators.
Abbreviation
Lit
Not Lit
FS ()
FK
B
SF
DF
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NX-series EtherCAT Coupler Unit User's Manual (W519)
Lit.
Not lit.
A flashing pattern other than flickering, blinking, single flash, and double flash. The
numeric value in parenthesis is the interval.
Flickering
Blinking
Single flash
Double flash
Undefined.
Function
Indicator status
13 Troubleshooting
13 - 3
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Troubleshooting
