JPH082722Y2 - Setting circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] This invention is connected between a control circuit and a controlled circuit,
The present invention relates to a setting circuit that performs manual / automatic switching of control of a controlled circuit.

[Prior Art] A conventional circuit of this type is shown in FIG. FIG. 3 is a connection diagram showing the configuration of a conventional setting circuit. In the figure, IN1 to IN4 are signal input terminals, OUT1 to OUT4 are signal output terminals, S0 is a manual / automatic changeover switch, and S1 to S4 are manual data setting switches. Is.

The conventional setting circuit is configured as described above, and the switch S0
Is switched to automatic control, the output signal from a control circuit (not shown) such as a microprocessor input to the signal input terminals IN1 to IN4 is
The signal is output to the signal output terminals OUT1 to OUT4 with the same logic via the OR gate.

Next, when the switch S0 is switched to the manual control, even if the output data from the control circuit is input to the signal input terminals IN1 to IN4, it is blocked by the AND gate, and the manual data setting switch S1 replaces this data. The data set in ~ S4 will be output to the signal output terminals OUT1 ~ OUT4, and manual / automatic switching will be performed.

[Problems to be Solved by the Invention] Since the conventional setting circuit as described above is configured as described above, when the switch is operated to switch to the manual control, the data output to the signal output terminal is All must be set with the manual data setting switch, and even data that does not require the change set by the automatic control must be reset with the manual data setting switch. Therefore, the data setting operation becomes complicated, and as many manual data setting switches as the number of signal output terminals are required for data setting. Further, the conventional circuit has a problem that the data set by the manual data setting switch cannot be read by the control side.

The present invention has been made to solve such a problem, and even when the control is switched to the manual control, the data set by the automatic control is retained as it is, and the set value can be manually changed only when the change is necessary. It is an object of the present invention to provide a setting circuit which can be read by a control side and which can be set by manual control.

[Means for Solving the Problem] The setting circuit according to the present invention is provided with a presettable counter and a feedback circuit for returning the data from the signal output terminal to the signal input terminal.

[Operation] In the present invention, since the presettable counter and the feedback circuit for returning the data from the signal output terminal to the signal input terminal are provided, it is stored in the internal memory even when switching to the manual control. The set value can be manually changed only when the change is necessary based on the set value, and the set value set by the manual control returned to the signal input terminal can be read by the control side.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a connection diagram showing an embodiment of the present invention. In the figure, the same symbols as those in FIG. 3 indicate the same or corresponding parts, IC1 is a presettable counter, Rf1 to Rf4 are feedback resistors, and D1 to D4 are setting. Value input terminals, Q1 to Q4 are set value output terminals, PR is a preset signal input terminal, UP is a set value change pulse input terminal (increase), and DN is a set value change pulse input terminal (decrease).

The data of the set value input terminals D1 to D4 at the time when the preset signal is input to the preset signal input terminal PR is written in the internal memory (not shown) of the presettable counter IC1. Therefore, when the automatic control is switched to the manual control, the signal logic in D1 to D4 at the time when the last preset signal is output from the automatic control side is set in the internal memory, and this signal logic is Q1 to Q4.
Output from That is, in the case of manual control, the preset signal is not input, and even if the logic of D1 to D4 changes, it does not affect the logic of Q1 to Q4. To change the logic of Q1 to Q4 by manual control, input a pulse from the setting value change pulse input terminal UP or DN, and the presettable counter IC1 counts up or down this input pulse, Change the logic of Q1 to Q4. That is, the set value change pulse input terminals UP and DN supply pulses to these terminals to change data by manual control, and may be either UP or DN.

The feedback resistors Rf1 to Rf4 input the output data output to OUT1 to OUT4 when this circuit is set to the manual control side.
A feedback circuit that feeds back to the control side (not shown) of 1 to IN4 is configured, and the manually set output data can be read from the control side.

FIG. 2 is a connection diagram showing a case where the setting circuit shown in FIG. 1 is applied to a high-frequency matching circuit. In the figure, the same symbols as those in FIG. 1 indicate the same parts, S10 is a manual / automatic changeover switch, and S11 is a manual switch. Data setting switch, IC2 is a control circuit microprocessor, P1 to P4 are input / output terminals, PRC is a preset signal output terminal, IC3 is a setting signal current amplification IC, K1
~ K4 is a matching circuit capacitor switching relay, C1 to C4 are matching capacitors, and L1 is a matching inductor.

Next, the operation will be described. If the manual / automatic switch S10 is connected to the preset signal output terminal PRC, the circuit is performing automatic control, and the matching circuit capacitor switching relays K1 to K4 are output from the input / output terminals P1 to P4 of the microprocessor IC2. Controlled by the data.

When the matching capacitors C1 to C4 are adjusted here, the circuit is switched to the manual control side by switching the manual / automatic switch S10 so that the preset signal is not input. When this switching is performed, the data supplied to the set value input terminals D1 to D4 at the time when the preset signal was last output remains in the state of being written in the internal memory of the presettable counter IC1. Then, after that, the data output from the set value output terminals Q1 to Q4 is the data written in the internal memory regardless of the output data from the microprocessor IC2. Then, connect the manual data setting switch S11 to the UP side or DN side of the set value change pulse input terminal, supply a pulse to the presettable counter IC1 to rewrite the contents of the internal memory, and change the logic of Q1 to Q4. The constants of the matching capacitors C1 to C4 are changed by manual control.

Also, by switching the input / output terminals P1 to P4 of the microprocessor IC2 to the input state, no data is output from the microprocessor IC2, and the set value output terminals Q1 to Q4
The data output from is fed back to the setting output terminals D1 to D4 via the feedback resistors Rf1 to Rf4, and this data is input / output terminal P1.
It can be read by the microprocessor IC2 via ~ P4.

[Effect of the Invention] As described above, the present invention is provided with the presettable counter and the feedback circuit for returning the data from the signal output terminal to the signal input terminal. Therefore, even when switching to the manual control. Only when it is necessary to change the setting value based on the setting value stored in the internal memory, it is possible to easily change the setting value manually, and the manual data setting operation can be simplified. The number of manual data setting switches can be reduced. Further, there is an effect that the set value set by the manual control can be read from the control side.

[Brief description of drawings]

FIG. 1 is a connection diagram showing an embodiment of the present invention, FIG. 2 is a connection diagram when the present invention is applied to a high frequency matching circuit, and FIG.
The figure is a connection diagram showing a conventional circuit. IC1 is a presettable counter, Rf1 to Rf4 are feedback resistors, D
1 to D4 are set value input terminals, Q1 to Q4 are set value output terminals, PR
Is a preset signal input terminal, UP is a set value change pulse input terminal (increase), DN is a set value change pulse input terminal (decrease), S10 is a manual / automatic switch, S11 is a manual data setting switch, IC2 is a microprocessor, P1-P4
Is an input / output terminal, IC3 is a setting signal current amplification IC, K1 to K4 are matching circuit capacitor switching relays, C1 to C4 are matching capacitors, and L1 is a matching inductor. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A control circuit is connected between the control circuit and the controlled circuit in the case of controlling ON / OFF of respective switches of the controlled circuit corresponding to the logic of each bit of the binary signal output from the control circuit. In a setting circuit that performs manual / automatic switching of a controlled circuit, a set value input terminal for inputting a set value sent from the control circuit and an internal memory configured as a counter for the signal of the set value input terminal A preset signal input terminal for inputting a preset signal that gives writing timing,
A presettable counter having a set value changing pulse input terminal for inputting a pulse counted by a counter composed of the internal memory, and a set value output terminal for outputting a set value stored in the memory, and the presettable counter. A pulse signal is input to the manual / automatic changeover switch that switches whether to connect the preset signal input terminal of the counter to the preset signal output terminal of the control circuit or to open it, and to the set value changing pulse input terminal of the presettable counter. A manual data setting switch for inputting and a high resistance resistor connected between each set value output terminal of the presettable counter and the corresponding set value input terminal are provided to automatically control the controlled circuit. Connect the preset signal input terminal of the presettable counter to the manual / Connected to the preset signal output terminal of the control circuit via the automatic changeover switch, store the set value from the control circuit sent to the set value input terminal in the memory for each preset signal and output the set value. When outputting to the terminal and manually controlling the controlled circuit,
When changing the set value stored in the internal memory by opening the preset signal input terminal with the automatic changeover switch, input a pulse from the set value change pulse input terminal with the manual data setting switch to change the set value. A setting circuit, which is changed and output to the set value output terminals, and the outputs of these set value output terminals are read by the control circuit via the high resistance resistance when necessary.