| 摘要 |
PURPOSE:To realize a test and diagnosis by the on-line method for both the input/ output control unit and the input/output unit, by making the 1st part of the input/ output control part receive the control of the using system for the practical use and the 2nd part receive the control of the stand-by system for the test use respectively. CONSTITUTION:When the using ACT is normal in the control unit CTR, the time- division control becomes effective for the practical-use IOP 0-IOP m which mean the 1st part of the input/output control part. Thus control is given to the input/ output units I/O0-I/Om under the practical use. On the other hand, the time- division control becomes effective the test-use IOP m+1-IOP n at the 2nd part of the input/output control part for the stand-by SBY. Thus control is given to the input/output units I/Om+1-i/On each, and then a folded connection is given for the test. Then the using ACT is switched to the stand-by SBY owing to occurrence of a trouble in the ACT, the units I/O0-I/Om are switched to receive the control of the stand-by SBY. |
