Example1 YO START ST Control Purpose Controlling the running state of the ceiling-fan by pressing START and STOP Checking if the ceiling-fan is running normally by pressing TEST Devices Device X0 X1 X2 X3 Y1 Function Press START, XO-ON Press STO, X1-ON Press TEST, X2 ON Error signal Ceiling-fan motor control signal Program Description: Press START lightly and X0-ON. The ceiling-fan will keep running if no error occurred X3 OFF). The action can be practiced by a latching circuit which takes output Y1 as one of the input condition to keep the fan running even if the START button is not pressed. When STOP is pressed, X1-ON and Y1-OFF. The ceiling-fan will stop running If error occur (X3-ON), YI will be OFF and the ceiling-fan will stop rnning When TEST is pressed (X2-ON), Y1-ON. The ceiling-fan will start running if no error occurred (X3 OFF). On the contrary, when TEST is released, the ceiling-fan will stop running. The testing function is performed by this process. . Example1 YO START ST Control Purpose Controlling the running state of the ceiling-fan by pressing START and STOP Checking if the ceiling-fan is running normally by pressing TEST Devices Device X0 X1 X2 X3 Y1 Function Press START, XO-ON Press STO, X1-ON Press TEST, X2 ON Error signal Ceiling-fan motor control signal Program Description: Press START lightly and X0-ON. The ceiling-fan will keep running if no error occurred X3 OFF). The action can be practiced by a latching circuit which takes output Y1 as one of the input condition to keep the fan running even if the START button is not pressed. When STOP is pressed, X1-ON and Y1-OFF. The ceiling-fan will stop running If error occur (X3-ON), YI will be OFF and the ceiling-fan will stop rnning When TEST is pressed (X2-ON), Y1-ON. The ceiling-fan will start running if no error occurred (X3 OFF). On the contrary, when TEST is released, the ceiling-fan will stop running. The testing function is performed by this process