| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently, speedily and securely change the parameter of software in a controller at the time of changing it with a maintenance tool in the controller of a plant and the like. SOLUTION: The device is provided with the maintenance tool 102 having an execution program 125, parameter data 120, control data 121, trend data 126, with the controller 102 having an execution program 124, parameter data 122, control data 123 and trend data 127 and with a network 106 connecting them. The maintenance tool 102 displays the parameter change screen 116 of an operation element by a control state display screen 130 while the operation state of the controller 101 is monitored, changes a parameter and displays a changed result on the control state display screen 130 or a trend screen 115 so as to recognize it. Thus, the parameter of control software can speedily, precisely and rationally be changed.</p> |
