Controlling device
A control device, a technology for controlling operations, applied in control/regulation systems, liquid level indicators for physical variable measurement, instruments, etc.
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no. 1 Embodiment approach ]
[0070] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. This embodiment corresponds to the above-mentioned principle 1 of the invention and principle 3 of the invention. figure 1 It is a schematic block diagram of the structure of the control apparatus of this embodiment. The control device of the present embodiment has: an operation amount upper limit value OH1 storage unit 1, which mainly stores the operation amount upper limit value OH1 arbitrarily set by communication; an operation amount upper limit value OH2 storage unit 2, which mainly stores the operation amount upper limit value OH1. The operation amount upper limit value OH2 is set and stored by the user; the upper limit value selection unit 3 compares the operation amount upper limit value OH1 with the operation amount upper limit value OH2, and adopts the smaller one as the upper limit processing unit described later The upper limit value OH of the operati...
no. 2 Embodiment approach ]
[0102] Next, a second embodiment of the present invention will be described. This embodiment is another example corresponding to the principle 1 of the invention and the principle 3 of the invention described above. image 3 It is a schematic block diagram of the structure of the control apparatus of this embodiment. The control device of the present embodiment has: a control calculation unit 4; an operation amount lower limit value OL1 storage unit 7 which mainly stores an operation amount lower limit value OL1 arbitrarily set by communication; an operation amount lower limit value OL2 storage unit 8. It mainly stores the lower limit value OL2 set by the user; the lower limit selection part 9 compares the lower limit value OL1 with the lower limit value OL2, and adopts the larger one as the The operation amount lower limit value OL used by the lower limit processing section described later; The value above the lower limit value OL of the operating quantity; and the alarm ou...
no. 3 Embodiment approach ]
[0131] Next, a third embodiment of the present invention will be described. In this embodiment, the structure corresponding to the above-mentioned principle 2 of the invention and principle 4 of the invention is added to the first embodiment. Figure 5 It is a schematic block diagram of the structure of the control apparatus of this embodiment. The control device of the present embodiment has: an operation amount upper limit value OH1 storage unit 1; an operation amount upper limit value OH2 storage unit 2; an upper limit selection unit 3; a control calculation unit 4; The processing is to limit the operation amount MV calculated by the control operation part 4 to a value below the operation amount upper limit OH adopted by the upper limit selection part 3 or the upper limit change part described later; the alarm output part 6; The lower limit value OL2 storage unit 8; the lower limit processing unit 10a, which performs lower limit processing to limit the operation amount MV ...
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