| 摘要 |
PURPOSE:To check whether every device to be controlled is normal or abnormal outside the normal monitoring function only when an abnormality is detected, by using only one bit of a return signal to check whether all loads to be controlled are controlled normally or not. CONSTITUTION:When any of devices to be controlled is not operated normally, the output of corresponding one out of disaccord detecting circuits 61, 62... becomes high, and the output of an OR gate OR1 becomes high. Under this state, when a channel A is accessed, information indicating that a monitor input 0 is high is sent to a main operation monitor panel at the timing of a signal (b), and ''abnormality'' us recgnized. Then, the normal cyclic access at every constant time is stopped; and when the channel A is accessed, an output C of a chngeover switch 5 becomes high because the Q output of a one shot flip flop 35 is high, and output signals of outputs 1, 2, 3, and 4 of a device operation monitor circuit 3 are inputted to monitor inputs 1-4 of a terminal logic circuit 22, and thus, the abnormal device is recognized. |
