# LED Communication (COM)

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LED COM description

Light Color | State | Meaning
Green | On | Online, running, data exchange, cyclic communication
Blinking cyclic at 2Hz | Master in the state “Clear”
Red | Blinking acyclic at 1Hz | Device (controller) is not configured
Blinking cyclic at 2Hz | Not running, no communication, connection error
On | Wrong Profibus DP-Configuration
Green and Red | Off | Device if Off. No power.