| 摘要 |
<p>PURPOSE:To obtain the switching controller which can prevent malfunction of autonomous switching with extremely high reliability. CONSTITUTION:An autonomous switching circuit Which autonomously switch a couple of in-use and stand-by detachable control boards 16 and 16' between an in-use and a stand-by state is controlled by referring to the mounted states of those control boards. The switching controller is constituted by equipping the couple of control boards 16 and 16' with input port circuits 11 and 11' as mounted state detecting means which detect whether or not the opposite-side control boards are mounted, and a CPU 12 and an output port circuit 13, and a CPU 12' and an output port circuit 13' as switching control means which allow or inhibit the switching of the autonomous switching circuit according to the detection results of the respective input port circuits 11 and 11'.</p> |
