Interface checking device, e.g. for use in an automation system such as a CNC machine tool, has a comparison register whose bit pattern content can be varied according to predefined rules

摘要

Device for checking an interface between a control unit and one or more peripherals, said interface comprising address and data buses. The monitoring device comprises a comparison register (7) that can be used to compare a bit pattern (BM1) in the receiver (6) of the address bus. The bit pattern (BM2) in the comparison register can be varied according to predefined rules and an alarm signal (AL) generated if the registers do not agree.