Edm Led = External Device Monitoring; On Led = Outputs; Off/Err Led = Off & Error - Omron G9SR Series Operation Manual

Operation manual
6.4.4 EDM LED
Color: Yellow
ON when EDM function is enabled.
FLASH when any error on External Device Monitoring occurs.
See also § 6.5.2Error situations - LEDs G9SR-BC□-□ on page 24
OFF EDM function is disabled.
6.4.5 ON LED
Color: Green
ON when the outputs are activated = ON.
FLASH fast (3 per second) when input-loop chain is OK.
OFF when the outputs are de-activated = OFF.
6.4.6 OFF/ERR LED = OFF & Error
Color: Red
ON when OSSDs are OFF
FLASH when an error occurs (EDM and Restart leds provide error code).
Fast blinking & RES or COM fast blinking
= Communication error of another unit
Slow blinking = OSSD error.
Slow blinking & RES or COM slow blinking
= Communication error of this unit.
See also § 6.5.2 Error situations - LEDs G9SR-BC□-□ on page 24.
OFF when all internal diagnostics are successfully passed and OSSDs are
activated = ON.
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= External Device Monitoring
= Outputs
G9SR