Description of LEDs¶
The LEDs below the display indicate the status of the processor module:
| LED | State | Color | LED = ON | LED = OFF | LED flashes |
|---|---|---|---|---|---|
| Power LED (PWR) | Denotes the power supply state of the processor module | Green | Voltage is present (24 V DC) | Voltage is missing | - |
| Run LED (RUN) | Denotes the activity state of the processor module | Green | Processor module is in RUN mode | Processor module is in STOP mode | If the LED flashes fast (4 Hz) a firmware update is finished with no errors. If the Run LED flashes fast (4 Hz), alternating with a flashing Run LED the firmware is updated. To enforce boot mode 1, keep the RUN function key pressed during the boot procedure. In this case, the Run LED flashes slowly (1 Hz). A subsequent project download (from within Automation_Builder) cancels the blinking. |
| Error LED (ERR) | Denotes an error | Red | An error has occured (must be triggered by user program). | No errors or only warnings have occurred (must be set in user application). | If the Error LED flashes slowly (1 Hz) a firmware update from the memory card is finished with errors. If the Error LED flashes fast with AC500 on display a fatal system error has occurred. If the Error LED flashes fast (4 Hz) alternating with a flashing Run LED the firmware is updated. |
A running processor module is indicated with the state RUN on the display, a deactivated processor module is indicated with the state STOP. In both cases the display’s backlight is off.