| 摘要 |
PURPOSE: To precisely detect the connection state of an optional equipment. CONSTITUTION: This device is provided with a detection means (communication part 7, control part 9) detecting connection states of the optional equipments 5a-5d when power source is applied, a nonvolatile memory 8 storing the connection states of the optional equipments and a means comparing the connection states detected by the detection means with the connection states stored in the nonvolatile memory 8, and as the result of the comparison, the data of that connection exists are written in the nonvolatile memory 8 of a part where the connection state is changed from that no connection exists to that connection exists, and as the result of the comparison, related to the part where the connection state is changed from that connection exists to that no connection exists, a signal of an effect that a communication error occurs is outputted to an operation part 2. |
