LED State Displays¶
The state of the ETHERNET communication module is displayed by means of 5 state LEDs. The following figure shows the positions of the LEDs. The table after that shows the LED states and their meanings.
| LED | Color | Status | Description |
|---|---|---|---|
| PWR | Green | On | Power supply available |
| Off | Power supply not available or defective hardware | ||
| RDY | Yellow | On | Boot procedure |
| Blinking | Boot failure | ||
| RUN | Green | On | Communication module is operational |
| Off | Communication module is not operational | ||
| STA1 | Green | Blinking (1 Hz) | Device ready |
| Blinking (5 Hz) | Device configured / UDP traffic | ||
| On | MODBUS communication established | ||
| STA2 | Red | On | MODBUS communication error |
| Off | No error | ||
| STA1 and STA2 | Red Green |
Blinking (synchronously) | Firmware file transfers during coupler firmware update |
Red Green |
Blinking (alternately) | Coupler writes the firmware file to the internal flash. Do not power off the PLC. | |
Yellow Yellow |
Blinking (synchronously) | No production data available, no bus communication possible. |
The RJ45 ETHERNET connector contains two LEDs showing the current ETHERNET port connection state. The following figure and table show the position and function of the LEDs:
| LED | Color | Status | Description |
|---|---|---|---|
| ETH1 LED “Link” | Green | On | ETHERNET connection established |
| Off | No ETHERNET connection | ||
| ETH1 LED “RX/TX” | Yellow | On | — |
| Blinking | Device sends/receives frames | ||
| Off | — | ||
| ETH2 LED “Link” | Green | On | ETHERNET connection established |
| Off | No ETHERNET connection | ||
| ETH2 LED “RX/TX” | Yellow | On | — |
| Blinking | Device sends/receives frames | ||
| Off | — |