# Indicator LEDs

## Module LED Status

LED | Color | Status | Description
--- | --- | --- | ---
ETH1/ETH2 | Green | ON | Ethernet link (100 Mbps)
Flashing | Ethernet communication (100 Mbps)
Yellow | ON | Ethernet link (10 Mbps)
Flashing | Ethernet communication (10 Mbps)
- | OFF | No Ethernet link
BUS | Green | ON | Active connection to Primary reader
Flashing | Steady flashing: Ready Sequence of 3 flashes in 2 seconds: operating active
Red | ON | IP address conflict or Restore Mode or Modbus timeout
Flashing | Blink/Wink command active
Red/Green | Alternating | Waiting for assignment of an IP address, DHCP or BootP
- | OFF | Power off
ERR | Green | ON | Diagnostics disabled
Red | ON | Diagnostics enabled V2 undervoltage diagnosis is parameter-dependent
PWR | Green | ON | V1 and V2 power on
Red | ON | V2 power off or below the defined tolerance of 18V
- | OFF | V1 power off or below the defined tolerance of 18V

## I/O LEDs

LED | Color | Status | Description
--- | --- | --- | ---
LED TX | GREEN | Flashing | Data is being transmitted.
LED RX | GREEN | Flashing | Data is being received.
RED | Flashing | Data is being received, protocol error. (Parity, Baud rate, ASCII/RTU)
RED | ON | Buffer overflow of received data
LED TX and RX | RED | Flashing, simultaneous | Overload of the port supply. Both LEDs of the corresponding port are flashing simultaneously.
RED | Flashing, alternating | Configuration error. Both LEDs of the corresponding port are alternately flashing.
IN1/IN2 | GREEN | ON | Input active
RED | Flashing | Overload of the port supply. Both LEDs of the corresponding port are flashing.
| OFF | Input of output inactive
C3/IN2 | WHITE | Flashing | Blink/Wing command active