JPS63280977A - Electromagnetic valve controller - Google Patents

Abstract

PURPOSE:To control a number of electromagnetic valves by branching and connecting a plurality of converting circuits individually or in parallel in a serial communication cable for transmitting serial signals. CONSTITUTION:From a serial signal output device 1 are wired a serial communication cable 2 to which are respectively branch connected a plurality of converting circuits 3 determined according to the number of electromagnetic valves 4. A plurality of electromagnetic valves 4 are connected in parallel to the respective converting circuits 3. The respective converting circuit 3 read the corresponding data of addresses from respective data blocks of serial signals to convert them to parallel signals corresponding to the respective electromagnetic valves 4. Even if one converting circuit 3 is failured, the other converting circuits can operate normally without be affected by any effects.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solenoid valve control device, more specifically, a solenoid valve control device for controlling a plurality of solenoid valves.
, relates to a solenoid valve control device that simultaneously performs OFF control.

In conventional fluid control devices, a large number of solenoid valves are often installed. In such cases, ON/OFF control of each solenoid valve is performed by a control signal from a control device. Since the valve and the valve are individually electrically connected,
This method not only requires a large number of wires, which is expensive, but also occupies a large amount of space, making the wiring work complicated.

To solve this problem, we convert a large number of parallel control signals for each solenoid valve from the control device into serial signals, convert the serial signals into parallel signals by one converter, and connect them to the converter. A method for controlling a plurality of solenoid valves is known.

In this method, there is a limit to the number of solenoid valves that can be connected to one converter, and it is difficult to control nearly 100 or more solenoid valves.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and provide a simple control device that can control a large number of solenoid valves.

The present invention has achieved the above object by providing a serial signal output device that outputs control signals related to a plurality of electromagnetic valves as one serial signal, one serial communication cable connected to the serial signal output device, and the serial communication cable. A plurality of solenoid valves are connected to each conversion circuit, and each conversion circuit reads the data of the corresponding address from each data block of the serial signal. This was achieved using a control device characterized by converting and outputting parallel signals corresponding to the respective solenoid valves.

The structure and operation of the present invention will be explained in detail based on the embodiment shown in the drawings.

In FIG. 1, the control device has a serial signal output device 1. In FIG. The serial signal output device 1 is a device that manually inputs data for each solenoid valve as a parallel signal, converts the multiple signals into serial signals, and outputs the same. It can also be configured as a device that inputs the signal and outputs the signal as a serial signal.

Serial signal output device? One serial communication cable 2 is wired from Z1, and a plurality of conversion circuits 3 determined according to the number of electromagnetic valves are branch-connected to the serial communication cable 2, respectively. A plurality of electromagnetic valves 4 are connected in parallel to each conversion circuit 3.

From the serial signal output device 1, as shown in FIG.
Data regarding all the electromagnetic valves are configured as one data block 5, and the data block 5 is periodically output after a certain idle period, for example, a time of two characters or more. In the data block 5, a character STX indicating the start of the data block and a character indicating the number n of link stations are provided at the beginning, and output data is arranged after that. The output data is sequentially arranged, for example, from No. 0 station to No. n-1 station, and each station is indicated by two characters, H and H.

The conversion circuit shown in FIG. 1 reads the address or station data to which it corresponds. One character of a data block is made up of, for example, 8 bits, and as shown in FIG. 3, the character is made up of a start bit S, a data focus 0 to 7, and a vertical even parity P and a stop bit E as necessary. .

A character including a data detection code is placed after the output data of data block 5 as necessary.

In Figure 1, N
o, 0 station, No, 1 station, ......No, n-
Assuming that the conversion circuits are arranged in the order of one station, No.
The conversion circuit of the Q station reads the data of the first two characters of the output data of the data block 5. Data L corresponds to, for example, data regarding solenoid valves No. 0 to No. 7, data H corresponds to data No. 18 to No. F, and one conversion circuit turns on, for example, 16 solenoid valves.
OFF control is possible.

One data block is for many cycles, - for example 6
Data for 4 stations can be placed, in which case a very large number of -
As an example, 1024 solenoid valves can be controlled.

Conversion circuits are individually connected to the serial communication cable 2, and each conversion circuit is in a parallel relationship with each other, so even if one conversion circuit malfunctions or the power of one conversion circuit is cut off, there will be no problem. , other conversion circuits can operate normally without being affected in any way.

The present invention makes it possible to simultaneously control a large number of solenoid valves with a small amount of wiring through a simple configuration in which multiple conversion circuits are branch-connected individually or in parallel to a serial communication cable that transmits serial signals. Ta. However, even if a failure occurs in one of the conversion circuits, it does not affect the other conversion circuits or the electromagnetic valves connected thereto.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is an explanatory diagram showing an example of a data block used in the present invention, and FIG. 3 is an explanatory diagram showing an example of the structure of one character of the data block. 1... Serial signal output device 2... Serial communication cable 3... Conversion circuit 4... Solenoid valve 5... Data block

Claims (1)

[Claims] a serial signal output device that outputs control signals related to a plurality of electromagnetic valves as one serial signal; one serial communication cable connected to the serial signal output device;
The serial communication cable has a plurality of conversion circuits that are individually branch-connected, and a plurality of solenoid valves are connected to each conversion circuit, and each conversion circuit converts the corresponding address from each data block of the serial signal. A solenoid valve control device characterized by reading data and converting it into parallel signals corresponding to each solenoid valve.