Status LED and Status Output Signal

The controller includes a Status LED on its top board and a Status Output Signal Connector that can indicate the execution state of the controller. The digital output signal connector permits an external LED to be driven if the controller is embedded and the on-board LED is not visible.

To configure the Status Output Signal Connector or any general purpose digital output to blink in synchronization with the Status LED, the "Power State DOUT" (DataID 235) must be set equal to the signal's channel number.

The execution conditions that are indicated by the LED and the output signal (if configured) are described in Table 17-1.

Table 17-1: Execution Conditions Indicated by the LED and Output Signal
LED/Signal State	System Status	Description
Continuously Off	(1) Logic power off or (2) CPU crashed	Normally indicates that 24VDC logic power is off. In rare instances, indicates that the controller has crashed due to a system hardware or software error. The processor may be executing the firmware debugger, dBug.
Continuously On	(1) Booting or (2) CPU crashed	Typically indicates that 24VDC logic power is on and the controller is executing its start-up boot sequence. If the LED turns on continuously after it has been blinking, the processor has crashed due to a system hardware or software error. The processor may be executing the firmware debugger, dBug.
Blinks once per second	Normal operation, motor power off	The controller is executing in its standard operating mode and motor power is disabled.
Blinks four times per second	Normal operation, motor power on	The controller is executing in its standard operating mode and motor power is enabled.
Blinks eight times per second	CPU overheating	The processor is overheating, motor power is off and you have 5 minutes to save any programs or data. After 5 minutes, the processor will shut down and needs to be rebooted.