| 摘要 |
<p>PURPOSE:To execute the control operation from a failed point continuously with another controller at a failure of a controller, by providing a means transferring and storing data mutually between an internal memory device and an external device. CONSTITUTION:An internal memory device M of a sequence controller 1 consists of a program area A, a timer counter present value area B, a keep relay area C and a data area D and the like in order from the upper part. A loader 2 is provided with a recording start switch K transferring and storing the data of the device M to an external memory device 3, a reproduction start switch S transferring and storing the data in the device 3 to the device M, and storage area designation switch groups A'-D' designating to which area of the device M each data from the device 3 is stored. The switch groups A'-D' correspond to area A-D of the device M respectively so that the data in the device 3 can be stored in the specified area of the device M with the operation of the designation switch.</p> |
