7
IO-Link Connection Procedure 
 
12
Check that the LED status is as 
shown below, which indicates 
that Slave Terminal is able to 
communicate. 
 
RUN  : Not lit 
ERR  : Not lit 
TS  : Green flashing 
L/A IN  : Green flickering 
L/A OUT: Not lit 
 
 
13
The LED status of Controller is 
as shown below when an error 
occurs in EtherCAT 
communications due to the 
temporary interruption of Unit 
power supply for Slave Terminal. 
 
NET RUN : Not lit 
NET ERR : Red flashing 
LINK/ACT : Yellow flashing 
 
14
Select Troubleshooting from 
the Tools Menu.   
The Troubleshooting Dialog Box 
is displayed. Check that a Link 
OFF Error occurs as shown in 
the figure on the right. 
 
Click Reset All. 
A confirmation dialog box is 
displayed. Check the contents 
and click Yes.