# LEDs

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## CC-Link Slave LEDs

The communication status LEDs are used to represent the CC-Link Slave status. There are two LEDs: L RUN and L ERR.

LED | Color | State | Meaning
L RUN | LED green
Green | On | After establishing the connection with the CC-Link network, the device is receiving the cyclic data
Off | Off | 1. Connection with network not yet established 2. No carrier can be recognized 3. Timeout occurred 4. Hardware reset happened
L ERR | LED red
red | blinking | Switch position has been changed while pulling the reset (It blinks for 0.4 seconds)
red | On | 1. CRC error 2. Address parameter error (Address 0, or greater than 64 is set, including number of occupied stations) 3. Error in settings of baud rate switches while pulling the reset (5 or greater)
Off | Off | 1. Normal communication 2. Hardware is resetting