The motion interface board has detected an E-STOP condition generated by the motor amplifiers. It indicates that the amplifiers have detected some fault condition. Check for a subsequent message. To determine if there was an unreported RSC error type listr error(task 4) where task is the number of the task that received the error. If no additional information is available verify that the amplifiers are plugged into the backplane correctly the fixing screws are tightened and the motor and signal cables are connected correctly.