| 摘要 |
PROBLEM TO BE SOLVED: To improve inspection efficiency by switching a control mode from a normal control mode to a test mode without providing any special input/output terminal while preventing malfunction. SOLUTION: The control unit 10 having input terminals and output terminals has as its control modes the normal control mode and the test mode which is shorter in signal output time, etc., than the normal control mode and the control mode is switched from the normal control mode to the test mode only when a specific entry signal is inputted to a specific input terminal among the input terminals under an input condition which is never generated at normal control time. In the test mode, whether or not a signal input/output function of the control unit 10 is good is inspected. |
