The serial i2c bus from the AWC to the CIP has failed. This bus is used for I/O to the front panel and for the digital I/O signals connected to the CIP. High power is disabled if a failure occurs on this bus. This message may occur normally when certain diagnostic programs are run. Check the cabling from the AWC to the CIP. Power down and restart the controller. If this problem persists contact Adept Customer Service for assistance.