| 摘要 |
PURPOSE:To execute inspection without connecting an input and output device being a controlling object, by interposing a control circuit for bidirectional bus connection between a plurality of arbitrary input and output buses and connecting the buses selectively. CONSTITUTION:A circuit 400 connects an output line of input and output buses 300A and 300B connected to input and output interface sections (I/O-IF) 102A and 102B to buses 300B and 300A by activating the interbus connection control circuit 400. Thus, the information transmitted from an IF 102A is received to an IE 102B via the circuit 400. The information transmitted from the IF 102B is received to the IF 102A via the circuit 400. Thus, the operation confirming test for the IF 102A and 102B is finished. Through the test means, without actually connecting the devices 200A and 200B being controlling objects, the test and check to the IF 102A and 102B can easily and quickly be executed with simple hardware constitution. |
