| 摘要 |
PROBLEM TO BE SOLVED: To prevent a malfunction.SOLUTION: A unit control apparatus 10 includes: a first receiving section 11 which receives a first signal 11a indicating a control state of a connected unit 20, by use of a voltage level; and a second receiving section 12 which receives a second signal 12a indicating a connection state of the unit 20. The unit control apparatus 10 fixes a voltage level of the first signal 11a when results of the first receiving section 11 and the second receiving section 12 indicate that the unit 20 is not connected, to prevent the change in voltage level of the first signal 11a due to noise or the like.SELECTED DRAWING: Figure 1 |
