AS Series Module Manual   
6- 20 
6.2.9 LED Indicators 
Number  Name  Description 
1  RUN LED Indicator
Operating status of the module 
ON: the module is running. 
OFF: the module is not running. 
2 
ERROR LED 
Indicator 
Error status of the module 
ON: a serious error exists in the module. 
OFF: the module is operating normally. 
Blink: a minor error exists in the module. 
3 
Analog-to-Digital 
Conversion 
Indicator 
Conversion status 
Blinking: conversion is in process. 
OFF: conversion has stopped.