| 摘要 |
PURPOSE:To exert no adverse influence upon a process by preventing a microprocessor from running away even if some abnormality occurs to new control information which is received through a transmission line. CONSTITUTION:When control information stored in an operation memory circuit 8 is rewritten, the control information stored in the operation memory circuit 8 is saved in a buffer memory circuit 9 and new control information is written in the operation memory circuit 8. If this control information becomes abnormal, the microprocessor 1 puts the last control information saved in the buffer memory 9 back to the operation memory circuit 8 and the control process is restarted according to the control information. |
