I have a dh 485 network that includes 1 micrologix processor, 1 Panel view and 2 AIC's. I have the processor in one enclosure and the PV in other one and there is an AIC in each enclosure. The AIC's have leds that indicates if there is communication but they are turning off and on so fast even when i'm not sending data to the PV. Is that normal or i'm doing something wrong ??? Thank you very much for your help.