| 摘要 |
PURPOSE:To eliminate a possibility of breakdown of a machine, and also to secure a worker's safety by constituting so that an emergency stop release state is changed by a kind of an emergency stop factor. CONSTITUTION:A lot of emergency stop factors are classified into the first and the second categories and stored. When a signal for showing an emergency stop factor belonging to the second category is outputted from an output register 16, a machine stops and its state is held. In this case, a CPU1 continues to generate a signal P. Therefore, when an emergency stop release switch 17 is operated, an FF11 is reset, and the stop state of the machine is released. Subsequently, when a signal for showing an emergency stop factor belonging to the first category is outputted from the register 16, the CPU1 discriminates it and stops sending out a signal P2. Accordingly, even if the switch 17 is operated, an emergency stop release signal C1 is not generated, the FF11 becomes a set state, and the stop state of the machine is also held. |
