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CPU 01 3 Product Description
HI 800 189 E Rev. 1.01 Page 15 of 40
3.4.3 LED Indicators
The light-emitting diodes (LEDs) indicate the operating state of the device. The LEDs are
classified as follows:
ƒ System LEDs
ƒ Program LEDs
ƒ Communication LEDs
ƒ Fieldbus LEDs
3.4.3.1 System Light Emitting Diodes
While the system is being booted, all LEDs are lit simultaneously.
LED Color Status Description
On Module in STOP or RUN, normal operation
Blinkin
g A new operating system is being loaded.
RUN Green
Off The controller is not in the RUN state.
On The controller is in the ERROR STOP state.
Internal fault detected by self-tests
e.g., hardware fault, software error or cycle time overrun.
The processor system can only be restarted with a
command from the PADT (reboot).
Blinkin
g If ERROR blinks and all others LEDs are lit simultaneously,
the boot loader has detected an operating system fault in
the flash memory and waits for a new operating system to
be loaded.
ERR Red
Off No faults detected.
Table 5: System Light Emitting Diodes