| 摘要 |
PURPOSE:To sample logging without requiring any space for package addition on a shelf plate and revising a program for the logging. CONSTITUTION:On a microprocessor board 1 for replacement, a microprocessor circuit 2 of the same circuit constitution with a microprocessor whose logging is to be sampled, a logging output circuit 3, a logging output connector 8, and a connector 9 are mounted. The I/O instruction converting circuit 4 of the logging output circuit 3 converts an input/output instruction of the microprocessor circuit 2 into three-word data consisting of an IN/OUT discrimination code, an I/O address, and I/O data and writes the data in a FIFO 5. A parallel-serial converter 6 converts the three-word data into serial data. A level converter 7 converts the converted serial data into data which can be outputted to an external interface of RS-232C, RS-422, etc., and outputs the data to the logging output connector 8. |
