fy2000 microcomputer error-proof blocking system is a widely used, mature, reliable and comprehensive solution against electrical errors. it is mainly composed of four parts: a host suite, a communication link, an operation suite and a blocking suite. with the help of software technology, the system reproduces the blocking logic and rules of the error-proof service as a fail-safe rule base. combined with the blocking suite (error-proof lock), it realizes forced blocking at the error-proof points on the site. in cooperation with the intelligent error-proof identification and management of the computer key, it ensures that the switching operation can and only can be implemented in the correct order to realize error-proof management in multiple layers including station control layer, bay layer and process layer.