| 摘要 |
<p>PURPOSE:To efficiently perform a function check for a logical unit, by providing a voltage detection circuit which monitors exactly the voltage variable width of a DC power source supplied to the logical unit, at a power control module corresponding to the logical unit. CONSTITUTION:A variable DC voltage supplied from a power module 5-1 or a 6-1 to a logical unit 7-1 is sent to a power control module 3-1 as a voltage monitoring voltage. The variable DC voltage is inputted to a voltage detection circuit 4-1 in the module 3-1, and is detected as a prescribed voltage value, and a voltage varying width against a reference voltage is read automatically. The read value of the voltage varying width is sent to a service processor 2 from a power sequencer 1, and it is checked whether the read value is coincident with the numeric value of the voltage varying width given in advance to the sequencer 1 as an indication value from the processor 2, and a diagnostic program is started up at a time when both the voltage varying widths are coincident.</p> |
