| 摘要 |
<p>PURPOSE: To prevent erroneous access from being executed to a parameter by suitably limiting the request of access to the parameter inside a programmable controller(PC) by deciding whether the access request is suitable or not by collating it with arbitrarily settable access right information. CONSTITUTION: A mediation processing means is provided with an access right storage part 14 for storing the arbitrarily settable access right information showing whether access to the parameter inside the PC is permitted or not. Further, this device is provided with an access right deciding part 12 got discriminating whether the request of access from an external device to the parameter inside the PC is permitted or not according to the access right information when that access right is generated and a means for executing the access whose request is permitted by the access right deciding part 12. Then, since it is decided whether the request of access issued from the external device to the parameter inside the PC is suitable or not by collating it with the arbitrarily settable access right information and the request of access to the parameter inside the PC can be suitably limited, erroneous access can be prevented from being executed to the parameter.</p> |
