| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device, capable of safely and surely holding a user program, in spite of its being editable on-line. SOLUTION: A control/display device 3 normally alternately executes control processing, based on an instruction list formed by developing the user program and image screen renewing processing according to a state of a device 2a, and when indicating on-line editing, the control/display device 3 changes the instruction list instead of the image screen renewing processing. After finishing editing, the control/display device 3 displays, so as to store the user program in a first user program storage part 31 of a Static RAM and to store the user program, in a second user program storage part 33 of a flash ROM. The control/display device 3 reads out the user program from the second user program storage part 33, when the user program of the first user program storage part 31 is lost. |
