LED Description
For the EtherNet/IP scanner protocol, the communication LEDs MS and NS as well as the Ethernet LEDs LINK and ACT can assume the state described below.
| LED | Color | State | Description |
|---|---|---|---|
| MS (Module Status) General name: COM 0 | Duo LED red/green | ||
 (Green) | ON | Device operational: The device is operating correctly. | |
 (Green) | Flashing (1 Hz) | Standby: The device has not been configured. | |
(Green, Red, Green) | Flashing | Self-test: The device is performing its power-up testing. | |
 (Red) | Blinking (1 Hz) | Major recoverable fault: The device has detected major recoverable fault. E.g. an incorrect or inconsistent configuration can be considered a major recoverable fault. | |
 (Red) | ON | Major unrecoverable fault: The device has detected a major unrecoverable fault. | |
 (OFF) | OFF | No power: The device is powered OFF. | |
| NS (Network status) General name: COM 1 | Duo LED red/green | ||
| (Green) | ON | Connected: An IP address is configured, at least one CIP connection (any transport class) is established. Exclusive Owner connection has not timed out. | |
| (Green) | Flashing (1 Hz) | No connections: An IP address is configured, but no CIP connections are established. Exclusive Owner connection has not timed out. | |
(Red, Green, Off) | Flashing | Self-test: The device is performing its power-up testing. | |
| (Red) | Blinking (1 Hz) | Connection timeout: An IP address is configured, and Exclusive Owner connection for which this device is the target has timed out. The NS indicator returns to steady green only when all timed out Exclusive Owner connections are reestablished. | |
| (Red) | ON | Duplicate IP address: The device has detected that its IP address is already in use. | |
| (OFF) | OFF | Not powered, no IP address: The device does not have an IP address. (Or is powered OFF). | |
| LED | Color | State | Description |
|---|---|---|---|
| LINK Ch0 & Ch1 | LED green | ||
| (Green) | ON | The device is linked to the Ethernet. | |
| (OFF) | OFF | The device has no link to Ethernet. | |
| ACT Ch0 & Ch1 | LED yellow | ||
 (yellow) | Flickering (load dependent) | The device sends/receives Ethernet frames. | |
| (OFF) | OFF | The device does not send/receive Ethernet frame. | |
| LED State | Description |
|---|---|
| Blinking (1 Hz) | The indicator turns ON and OFF with a frequency of 1 Hz. Turn ON for 500 ms, followed turn OFF for 500 ms. |
| Flickering (load dependent) | The indicator turns ON and OFF with a frequency of approx. 10Hz to indicate high Ethernet activity. Turn ON for 50 ms, followed turn OFF for 50 ms. The indicator turns ON and OFF in irregular intervals to indicate low Ethernet activity. |
← Specification Modes →