| 摘要 |
PURPOSE:To inform a trouble to an MPR directly and in a concrete form by securing an AND between the data written to a maintenance equipment having a data return function and the trouble generation signal showing that a trouble occurs at each peripheral equipment. CONSTITUTION:In case a fuse FS of a power supply Vs of a peripheral equipment P is not blown, a relay is set at a position alpha. Then the data (d) written by the conventional function is read directly to an MPR agan via a bus Bd. While a drive power supply Vd is earthed and the input is delivered through one side of an AND gate 1b in case the FS is blown and the relay is set at a position beta. Thus all signals consist of '0', for example. This all-'0' signal is defined as a trouble generation signal S and therefore the output of the gate 1b is also equal to S. Therefore the 2nd gate 2c is opened by the gate signal (r) of a decoder DEC2 corresponding to the read request signal Rrq. Then the signal S is sent to the bus Bd and then read by the MPR. Thus the MPR can know a specific peripheral device that is set under a fuse cut-off state. |
