LED Diagnostics for M580 Standalone CPUs

LED Display

LED Descriptions

LED Indicator	Description
RUN	ON: The CPU is in RUN state.
ERR	ON: The CPU or system has detected an error.
I/O	ON: The CPU or system has detected an error in one or more I/O modules.
DL (download)	Blinking: Firmware update in progress. OFF: No firmware update in progress.
BKP	ON: The memory card or CPU flash memory is missing or inoperable. The memory card is not usable (bad format, unrecognized type). The memory card or CPU flash memory content is inconsistent with the current application. The memory card has been removed and reinserted. A PLC > Project Backup... > Backup Clear command has been performed when no memory card is present. The BACKUP LED remains ON until the project is successfully backed up.
BKP	OFF: The memory card or CPU flash memory content is valid, and the application in the execution memory is identical.
SEC	NOTE: This LED is not enabled for this version of the module.
ETH MS	MOD STATUS (green/red): Pattern indicates the Ethernet port configuration status. NOTE: With the detection of a recoverable error, the ETH MS LED can be green or red and on or off.
ETH NS	NET STATUS (green/red): Pattern indicates the Ethernet connection status.

This table describes the LED indicator patterns:

Symbol	Description	Symbol	Description
	off		steady red
	steady green		blinking red
	blinking green		blinking red/green

LED Diagnostic Indications

NOTE: In a Hot Standby system, specific IP addresses (Main IP Address, Main IP Address + 1, IP Address A, IP Address B) are assigned and these addresses must not be used by other devices in the system.

NOTICE

UNINTENDED EQUIPMENT BEHAVIOR

Confirm that each module has a unique IP address. Duplicate IP addresses can cause unpredictable module/network behavior.
Do not assign an IP address equal to the Main IP Address, the Main IP Address + 1, IP Address A, or IP Address B to any Ethernet device that potentially communicates with the Hot Standby system. A duplicate IP address condition, causing unintended equipment operation, can occur.

Failure to follow these instructions can result in equipment damage.

The LEDs provide detailed diagnostic information when you observe their pattern in combination:

Condition	CPU State	RUN	ERR	I/O	ETH NS
power on	Autotest
not configured (before getting a valid IP address or configuration is invalid)	NOCONF				–
configured	Stop			• off: no error detected • steady red: error detected in a module or a channel	• off: invalid IP address • blinking green: valid IP address but no EtherNet/IP connection • steady green: EtherNet/IP connection established
configured	RUN
recoverable detected error	HALT			–	• blinking red: At least one exclusive owner CIP connection (for which the BMENOC0301/11 is the originator) is timed out. The LED blinks until the connection is reestablished or the module is reset.
duplicate IP address	–	–	–	–
unrecoverable detected error	–
power off	–
–: any pattern