JPS58211207A - Sequency control device - Google Patents

Abstract

PURPOSE:To improve remarkably a use function, by feeding back a data terminal output of a memory device to an address terminal input through a three state buffer, and controlling this buffer by a data terminal output of other memory device. CONSTITUTION:When feeding back data terminal D1, D2-Dn outputs of a memory device 3 to an address terminal, each data terminal output is inputted to the address terminal through three state buffers 41, 42-4n, respectively, by which a feedback circuit 5 is constituted. Also, a memory device 6 for storing a data regarding whether an output of an inputting circuit 1 is self-held or not, at every said output is provided, and by data terminal D1-Dn outputs this device 6, on- and-off operations of the buffers 41-4n are controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sequence creation device that is realized with a simple configuration centered on a memory device without having a microprocessor.

And more composed of input of tally? The address terminal A1 of the metering device (3) is connected to the multiple outputs of the input circuit (+) having the input circuit (+).
Connecting the outputs of a plurality of data terminals D1...Dm of the memory device (3) to the input terminal of the output circuit (2) for inputting data to An and controlling an external device for counting (not shown), Me C Su I lfl +3+ Each Atsushiko A
1...An Data terminal D1...D for input
rn The data of the output state of the output circuit corresponding to each input of the input circuit is stored and set as the output state, and each output image 1111+2+ is set corresponding to each input of the input circuit based on the data stored in the memory device (3). It was designed to change the control state of external equipment, and this was intended to provide υ sequence control operation.

However, in such a conventional example, when self-holding operation is required, this is achieved by feeding back a part of the Dm output from the data terminal of the memory device (3) to its corresponding address terminal. , when feedback is applied to all inputs and outputs of the memory device (3), the atmos input of the memory device becomes unusable. For this reason, in such conventional examples, there is no choice but to limit the number of terminals configured to form a feedback circuit and provide a self-holding function, and the circuit device #! The present invention has been provided in view of the above-mentioned problems, and it is possible to provide a self-holding function between arbitrary input and output terminals of the metering device. Moreover, the sequence control is such that data indicating whether or not the output state of each data output of the memory device should be self-maintained for each output of the input circuit can be rotoramed in advance to the second memory device. The purpose is to provide the equipment for financial gain.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 2 shows a circuit according to an embodiment of the present invention, and in the conventional circuit shown in FIG. In doing so, a feedback circuit (5) is configured so that each data terminal output is input to the address terminal via three-state buffers (41)...(4n) (r), and each output of the input circuit (1) is A second memory device (2) that stores data on whether it is self-retaining or not.
'(6) is provided, and the data terminal D of this metering device (6) is provided.
1. The above three-state buffer (4□) is created by d.
−〇Oshi, it is designed to control the off operation. Here, sequence program data is written in the first memory device (3) as the relationship between the data terminal D1 and the output with respect to the address terminal A1 and the input, similar to that of the conventional example shown in FIG. The second metering device (6) includes:
Data is written indicating which data terminal D1 to which output is self-held when the output of the input circuit (1) is generated.

Thus, in the above embodiment, normally all three-state buffers (4□) ~ are in the cut-off state, and the input circuit i
The sequence calculation quotient 1 operation is carried out in a circuit similar to that of the conventional example shown in FIG. Next, the input circuit (] where the information to be self-maintained is written in the measuring device (6) of younger brother 2
) If an output occurs at the output, the output signal is input to the address terminal A of the metering device (3), and by inputting it to the address terminal A of (6), the data terminal is changed to V.
C output, which causes a three-state buffer (4
ρ becomes positive, the data output of the memory device (3) is fed back to the address input side, and self-holding is achieved.

FIG. 3 shows another embodiment circuit of the present invention,
In addition to the embodiment shown in FIG. 2, a part of the CR internal relay can also be self-maintained. Here T
The CR internal relay is a saturation element formed in the memory device b (3) for the purpose of obtaining a timer function.
The functional operation of the CR internal relay can be controlled by applying an input to the address terminals 1 to 1 of the main E'J device 1:1 corresponding to the internal relay. In the example of FIG. 3 of the χ lever,
Similarly to the embodiment in FIG. 2, each output from the data terminals D1 to D1 of the memory device (3) is
1) Feedback to the address terminal on the input side via ~, and the address terminal Ak? corresponding to the memory device (3) OCR internal relay. Second method%#i'
The outputs of some data terminals Dk and 'j= of +6+ are inputted, and the outputs of some other data terminals D1 to Dk (octal data in the illustrated example) of the second metering device tlt6) areヂ]-da (7) and decodes each three-state buffer (4□9~) according to the decoded output.Therefore, in this embodiment, the self-holding function depends on the number of output points. In addition to obtaining the same number of chips as in the embodiment shown in FIG. It has the effect of being able to be retained.

As described above, the present invention feeds back the data terminal output of the metering device to the address terminal input via the three-state buffer, and the three-state buffer? Since it is controlled by the data terminal output of the memory device of %2, it is possible to obtain the same number of self-holding functions as the number of output points, even though it is made up of only the memory device included in the CPU 1 and is inexpensive and small. This has the effect of greatly improving the usable functions.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a conventional example, Fig. 2 is a circuit diagram of a first embodiment of the present invention, Fig. 3 is a circuit diagram of a second embodiment of the present invention, and (1) is an input circuit. , (2) is an output circuit, (3) is a memory device, (4□) ~ is a three-state buffer, (
5) is a feedback circuit, (6) is a second memory device, and (7) is a decoder. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] Fl+ An input circuit that receives a plurality of input signals, an output circuit that respectively controls a plurality of load devices, and a plurality of outputs of the input circuit? What is a memory device in which input is input to the address terminal and data terminal output is input to the above output circuit? In the sequence control system, the control conditions of the output circuit are set in rotoram based on the memory device as the state of the data terminal output for each address terminal input. and a second memory device that inputs each output of the input circuit to the address terminal and stores data regarding the presence or absence of self-holding. A sequence control device characterized in that it is configured to control the operation of each of the three stages of regeneration. (2) The operation of each three-state buffer is controlled by the output of some output terminals of the second memory device decoded by a decoder, and the output of some other output terminals of the second memory device is 2. The sequence control device according to claim 1, wherein the output is input to an address terminal of a metering device.