Manual

42 Publication ICM-UM001C-EN-E - March 2013
Chapter 4 Troubleshoot the Module
Module Status Indicator
ControlNet A and ControlNet B Status Indicators Together
ControlNet A or ControlNet B Status Indicator Individually
State Probable Cause
Off No power applied to device
Alternating Red/Green LED power up test (module self-test)
Flashing Red Recoverable fault has occurred:
• Firmware (NVS) download is currently in progress
• The MAC ID has changed
• CPU load has been exceeded
Solid Red Unrecoverable fault has occurred:
• Self test failure (checksum failure at power up, RAM test
failure at power up
• Firmware fatal error
Solid Green Device is operating correctly (normal mode)
State Probable Cause
Both Off Reset, no power or entire network interface deactivated
Alternating Red/Green Self test mode
Alternating Red/Off Bad/invalid node configuration (such as duplicate MAC ID)
Both Red Failed link interface or failed module
State Probable Cause
Off Channel is disabled or channel is not supported
Flashing Red/Green Invalid link configuration
Flashing Red/Off Severe Link error - link fault or no MAC frames received
Flashing Green/Off Temporary channel error or listen-only
Solid Green Normal operation - MAC frames are being received without
detected errors