| 摘要 |
<p>PURPOSE: To improve both the safety of a system and the easiness of a confirming method regarding altered contents after control alterations by making the control alterations within a range wherein there is no hindrance to specific driving. CONSTITUTION: When in-RUN alterations are made on a PC 1, in RUN alteration information is set and I/O information after the in-RUN alterations is set, so that a process is performed. When the in-RUN alteration process is carried out after conditions based upon the information are set, the previously inputted I/O data is read out of the PC 1 4 sent from the PC 1 to a peripheral device 5. The peripheral device 5 decides whether or not the sent data meet the alteration conditions and when not, the information is read out of the PC 1 again. When the conditions of an in-RUN alteration command are met, the peripheral device 5 performs the in-RUN alteration process for the first time according to that as a trigger, and consequently the RUN alterations can be made under the conditions exerting no influence on the control system.</p> |
