The following figure shows an example of the LEDs of the EtherNet/IP™, Modbus TCP design:
[1]
"L/A OUT" LED
For devices with CS..A safety card:
[2]
"L/A IN" LED
[5]
"F-RUN" LED
[3]
"NS" LED
[6]
"F-ERR" LED
[4]
"MS" LED