| 摘要 |
PURPOSE:To use a main operation board for monitor of both the load operation state and the control output by providing a monitor display device and a monitor signal selection switch to the main operation board and deciding the state of each load device with the signal selected by the monitor signal selection switch out of the return and control signals sent from a terminal device to display those states of load devices to the monitor display device. CONSTITUTION:A main operation board 1 is usually set in an operation state nonitor mode and decides the working state of each load device by the return signal given from a terminal device to display these working states to a monitor display device 4. Then a monitor signal selection switch 5 is pushed and turned on, and the board 1 detects the ON state of the switch 5. Then the board 1 is switched to a control output monitor mode and hereafter displays the working state of each load device designated by the control signal produced within the board 1 to the device 4. The control output monitor mode can be changed again to the operation state monitor mode by a reset operation, i.e., the second push of the switch 5, the reapplication of the power supply of the board 1, etc. |
