Omron TJ2-MC02 Hardware Reference Manual page 246

Hardware reference
LED indicators
/i
LED Description Color
RUN Unit status Green
ERR Unit error Red
L/A IN Link/activity Green
IN port
L/A OUT Link/activity Green
OUT port
HARDWARE REFERENCE MANUAL
Status Meaning
OFF Init state
Blinking Pre-Operational state
Single Safe-Operational state
flash
ON Operational state
OFF No error
Double An application watchdog timeout has
flash occurred
Single Unit has changed its state autono-
flash mously, due to local error.
Error indicator bit is set to 1 in AL status
register.
Blinking General configuration error.
ON A critical communication or application
error has occurred.
OFF Link not established in physical layer
ON Link established in physical layer
Flickering In operation after establishing link
OFF Link not established in physical layer
ON Link established in physical layer
Flickering In operation after establishing link
fig. 130
IN
RUN
L/A
ERR
TS
FG
L/A
OUT
UNIT PWR
IO PWR
240