| 摘要 |
PURPOSE:To enable to drive the driven point even if trouble occurs in a driving point information accumulating part and a power source circuit by doubling the control part, the driving point information accumulating part and the power source circuit, and by making a redundant constitution. CONSTITUTION:When control information is transmitted to a control part 20 through a control line 4 by either of common controllers, for example, a common controller 2, the control part 20 transmits the signal which is necessary for driving point control to a driving point information accumulating part 22 and a driving point information accumulating part 23 inside a block 28 of the other side at the same time, and the driving point information accumulating parts 22 and 23 accumulate the same contents. The control part 20 forms the self-system priority signal, transmits it as the selection signal to a selection part 26 through a selection signal line 33, and for a control part 21 inside the other block 28, and transmits the signal which prohibits the operation inside the control part 21 through a signal line between control parts 29. The selection part 26 selects either of driving lines 31 and 32 by the signal from the selection signal ine 33 and a selection signal line 34. |
