The following figure shows the LEDs of the PROFINET IO design:
[1]
"L/A" LED (X43_1/X43_2)
[4]
"USR" LED
[7]
"L/A" LED (X4233_1)
[2]
"PLC" LED
[5]
"BF" LED
[8]
"L/A" LED (X4233_2)
[3]
"IEC" LED
[6]
"US1" LED
