Mitsubishi Electric MELSEC iQ-R Series User Manual page 50

Check alarm codes, error history, and alarm history on the Event History window of the engineering tool.
[Diagnostics]  [System Monitor]  [Event History] button
Module Information List
Switch to the "Module Information List" tab to check various status information of the pulse input module.
Item
LED information
CH Module setting information
3 TROUBLESHOOTING
48
3.2 Checking the Status of the Module
Description
Displays the LED status of the pulse input module.
Displays the setting details of "Basic setting" of the module parameter.