JP3317568B2 - Solenoid valve control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller provided with a communication device for receiving solenoid valve drive data for driving a plurality of solenoid valves connected to a manifold as a serial signal and converting the serial signal into a parallel signal. And an electromagnetic valve control device configured to detect whether the fluid actuator that operates by driving the electromagnetic valve by the parallel signal is good or bad.

[0002]

2. Description of the Related Art Conventionally, this type of solenoid valve control device is shown in FIG. 3 described in Japanese Patent Publication No. Hei 3-13466. This has a plurality of solenoid valves 50A, 50B, 50
C, 50D, and 50E are connected to a manifold 51, and a controller 52 for collectively driving the solenoid valves is provided. The controller 52 and the control command device 53 are connected by communication lines 54A and 54B. From 53, the solenoid valves 50A, 50B, 5
Passages 55A, 55 for transmitting solenoid valve driving data for driving the solenoid valves 0C, 50D, 50E as serial signals, converting them into parallel signals by the controller 52 to drive the respective solenoid valves, and supplying and discharging the working fluid.
B, 55C, 55D, 55E, 55F, 55G, 55H
Cylinders 56A and 56 as fluid actuators
The working fluid was supplied to B, 56C and 56D. The quality of the operation of the solenoid valves 50A, 50B, 50C, 50D, and 50E is determined by the cylinders 56A, 56B, 56C, and 56D.
Detection switches 57A and 57A
B, 57C, 57D, 57E, 57F, 57G, 57H
Are installed in the cylinder, the electric wiring of these detection switches is connected to the sub-controller 52 independently for each detection switch, and the detection signals output collectively from each detection switch are converted into serial signals by the controller 52. Then, the data is transmitted to the control command unit 53.

[0003]

However, in this case, the quality of the operation of the cylinder is determined by the control commander 53 based on the detection signal transmitted from the controller 52.
The control commander 53 has a problem that the entire processing is slowed down because the number of procedures to be executed increases.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide an electromagnetic valve control device in which it is not necessary to judge whether the operation of a fluid actuator is good or not using a control command device.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a controller having a communication device for receiving solenoid valve drive data for driving a plurality of solenoid valves connected to a manifold as a serial signal and converting the data into a parallel signal. A plurality of fluid actuators that operate by driving the solenoid valves based on the solenoid valve drive data received by the controller are provided with detection switches for detecting the operating states of the fluid actuators. A determiner is provided for determining whether the operation of the fluid actuator is good or not based on a detection signal indicating the detected operation state of the fluid actuator.

[0006]

In the configuration of the present invention, the plurality of solenoid valves connected to the manifold are driven by the solenoid valve driving data received by the controller, and the plurality of fluid actuators are operated. This operation state is detected by the detection switch, and based on the detection signal, the quality of the operation of the fluid actuator is determined by a determiner provided in the controller. As described above, the controller determines whether the fluid actuator is operating properly, so that the control commander does not need to perform such processing.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, 1A, 1B, 1C, 1
D, 1E, 1F, 1G, and 1H are solenoid valves provided on both sides of the manifold 2 and have a pair of pilot-operated switching valves 3A, 3B, 3C, and 3D provided in front of the manifold 2, respectively. The switching valve 3A is switched by the pilot operation of the valves 1A and 1B, the switching valve 3B is switched by the pilot operation of the pair of solenoid valves 1C and 1D, and the switching valve 3C is switched by the pilot operation of the pair of solenoid valves 1E and 1F. The switching valve 3D is provided to be switched by a pilot operation of the solenoid valves 1G and 1H. 4A,
4B, 4C, 4D are cylinders as fluid actuators, and hoses 5A, 5B, 5C, 5D, 5E, 5F, 5
G and 5H respectively connect to the respective ports of the manifold 2 and control the switching of the switching valves 3A, 3B, 3C and 3D to control the respective cylinders 4A and 4
B, 4C, 4D having piston rods 6A, 6B, 6
C and 6D are provided so as to advance and retreat in the left-right direction in the figure. 7A, 7B, 7C, 7D are cylinders 4A, 4B, 4
A detection switch for detecting an operation state of C, 4D, which is provided at an end of each of the cylinders 4A, 4B, 4C, 4D, and is provided so as to detect a forward end of each of the piston rods 6A, 6B, 6C, 6D. 8 is a controller provided on the upper surface of the manifold 2, 9
Is a control commander installed at a location remote from the manifold 2.

[0008] The control command device 9 is composed of, for example, a programmable controller and is configured as follows. 1
Numeral 0 denotes an input device, which is connected to an input device 11 such as a keyboard via a data line 12, and inputs solenoid valve drive data having information of ON / OFF operation of one solenoid valve in units of 1 byte from the input device 11. Provided. An arithmetic unit 13 is connected to the input unit 10 by a data line and has a memory 14.
And a data line, so that the solenoid valve drive data input to the input device 10 is stored in the memory 14 and the data stored in the memory 14 is read. Reference numeral 15 denotes a communication device capable of bidirectional communication, and includes a computing unit 13 and a data line 16.
And the controller 13
The electromagnetic valve drive data is transmitted as a continuous serial signal for each bit on the basis of a communication permission signal transmitted through the communication permission line 17, or a continuous serial signal for each bit is received. It is provided to convert to a parallel signal. Reference numeral 18 denotes a display for displaying data stored in the memory.

The controller 8 is configured as follows. 1
Reference numeral 9 denotes a communication device capable of bidirectional communication, which is connected to a communication device 15 of the control command device 9 via a communication line 20, and receives solenoid valve drive data of a serial signal sent from the control command device 9 based on a communication permission signal. Then, it converts the parallel signal in 1-byte units, or converts the parallel signal in 1-byte units such as the result of judging the operation of the cylinders 4A, 4B, 4C, and 4D into a serial signal. 9 to be transmitted. 2
Numeral 1 denotes an arithmetic unit, which connects an input port to the communication device 19 and the data line 22.
And the output port is connected to the amplifier 23 and the output line 24, and each bit of the parallel solenoid valve drive data received and converted by the communication device 19 from the control command device 9 is converted into eight output lines 24. Solenoid valves 1A, 1B, 1C,
1D, 1E, 1F, 1G, and 1H are provided to transfer on / off signals of the respective solenoid valves to the amplifier 23 so as to correspond to 1H, 1F, 1G, and 1H. The amplifier 23 connects the respective output terminals to the solenoid valves 1A, 1B, 1C, 1D, 1E, 1
F, 1G, 1H, solenoids 26A, 26B, 2
6C, 26D, 26E, 26F, 26G, and 26H are connected by a power line 27 to amplify the ON signals of the respective solenoid valves output from the arithmetic unit 21 to generate solenoids 26A, 26B, 26
An exciting current for energizing C, 26D, 26E, 26F, 26G, 26H is provided to each solenoid.
The current detector 25 is composed of resistors each having a low resistance value, and detects a voltage drop caused by a current flowing through the resistors. Numeral 28 denotes a current judging device, which is connected to the current detector 25 via a signal line 29 and also connected to the output line 24, and the solenoid valve driving data output from the computing unit 21 and the voltage of the voltage drop detected by the current detector 25. To determine whether the operation of the amplifier 23 is good or not, and to input the result of the determination to the arithmetic unit 21 via the determination data line 30. Reference numeral 31 denotes a memory, which is connected to the computing unit 21 via a data line 32, stores the judgment result of the current judging unit 28 inputted to the computing unit 21, and stores each address switch 3 to be described later.
The address data of the detection switches 7A, 7B, 7C, 7D set in 3 is stored. Reference numeral 34 denotes a communication controller, which comprises a signal generator 35 and an input device 36.
Connects the signal generator 35 to the computing unit 21 via the command data line 37, and detects the detection switches 7A, 7A stored in the memory 31.
The addresses of B, 7C and 7D are read out, and the detection switches 7A, 7B, 7C and 7D are operated by the operation of the internal oscillator.
Is provided so as to sequentially transmit address selection data as data corresponding to the address of
The detection signals of the operating states of the cylinders 4A, 4B, 4C, 4D detected by the detection switches 7A, 7B, 7C, 7D are sequentially input as serial signals each time address selection data is transmitted from the signal generator 35, This is output to the decision unit 38 as a parallel signal. The determiner 38 determines whether the solenoids 26A, 26C, 26E, 26
A power line for energizing G and a signal line 39 are connected,
The input device 36 is connected to the data line 40 via the cylinder 4A,
4B, 4C, 4D piston rods 6A, 6B, 6C,
6D reach the forward end, respectively, and the detection switches 7A, 7
The comparison result between the solenoid valve driving data and the detection signals of the detection switches 7A, 7B, 7C, 7D at the time when the switches B, 7C, 7D are turned on is a determination result of the quality of the operation of the cylinders 4A, 4B, 4C, 4D. It is provided to transfer to the computing unit 21 as cylinder determination data. The cylinder determination data is stored in the memory 31 from the computing unit 21 as data in units of one byte. The solenoid valves 26A, 26C,
When 26E and 26G are driven, cylinders 4A, 4B, 4
The C and 4D piston rods 6A, 6B, 6C and 6D move forward, and the detection switches 7A, 7B, 7C and 7D are provided to be turned on.

Each of the detection switches 7A, 7B, 7C, 7D detects when the piston 6A, 6B, 6C, 6D reaches the forward end, and turns on the detector 43;
An address switch 33 for setting an address in a bit pattern of bits, a converter 41 for converting address selection data of a serial signal into a parallel signal for every four bits, and a parallel signal converted by the address of the address switch 33 and the converter 41 The comparator 42 compares the data with the address selection data. When the comparator 42 detects a match between the two data, a detection signal of the detector 43 is output to the communication line 45. Then, each detection switch 7A, 7B, 7
C and 7D converters 41 are connected to each other via a communication line 44,
The communication line 44 is connected to the signal generator 35, and the detectors 43 of the detection switches 7A, 7B, 7C, 7D are connected to each other via a communication line 45.
6, the detection switches 7A, 7B, 7C, and 7D selected by the communication controller 34 transmit detection signals detected by the detector 43 to the input device 36 of the communication controller 34.

Next, the operation of the above configuration will be described. The solenoid valve drive data in 1-byte units input from the input device 11 to the input device 10 of the control command device 9 is transmitted by the communication device 15 of the control command device 9 as a serial signal that is continuous for each bit by the communication line 20.
Is transmitted to the communication device 19 of the controller 8 via Controller 8
The serial signal received by the communication device 19 is converted into a parallel signal and then input to the arithmetic unit 21. The arithmetic unit 21
A solenoid 26A is connected to each line of the output line 24 based on the on / off data of the solenoid valve drive data converted into the parallel signal.
26B, 26C, 26D, 26E, 26F, 26G, 2
An on / off signal for exciting 6H is output in parallel. As for the on / off signal, only the signal related to the energization is amplified by the amplifier 23. The amplifier 23 supplies an exciting current to the corresponding solenoid via the power line 27 to drive the solenoid valve. And
The operation of the cylinder can be obtained by switching the corresponding switching valve by the pilot operation of the solenoid valve.

At this time, the exciting current flowing through the power line 27 is detected by the current detector 25. The current determiner 28
Solenoid valve drive data output by the calculator 21 and the current detector 2
Each bit is compared with the detected voltage drop of each solenoid detected by 5 to determine whether the operation of the amplifier 23 is good or not.
This result is stored in the memory 31 via the controller 21 from the determination data line 30 as amplifier determination data.

The operating state of the cylinder is determined by the signal generator 35 of the communication controller 34 connecting the detection switches 7A, 7
Each detection switch is selected in the order of 7A, 7B, 7C, and 7D based on the address selection data sequentially output to B, 7C, and 7D, and the detection signal of the selected detection switch is input to the communication controller 34 through the communication line 45. Are transmitted to the device 36 one bit at a time. The detection signals input to these input devices 36 are transferred to the determiner 38 as parallel signals. Judge 38
The solenoid valve drive of the output line 24 at the time when the detection switches 7A, 7B, 7C, 7D are turned on when the piston rods 6A, 6B, 6C, 6D of the cylinders 4A, 4B, 4C, 4D reach the forward end, respectively. The data is compared with the detection signals of the detection switches 7A, 7B, 7C, 7D, and the comparison result is transferred to the arithmetic unit 21 as cylinder determination data.
This data is stored in the memory 31.

The operation unit 13 of the control command unit 9 outputs a reception signal to the communication unit 15 via the communication permission line 17.
At this time, the amplifier determination data and the cylinder determination data stored in the memory 31 of the controller 8 are stored in the communication device 19 of the controller 8.
Is transmitted as a serial signal to the communication device 15 of the control command device 9,
These data are stored in the memory 14 included in the control command device 9. The two types of data are displayed on the display 18 under the control of the arithmetic unit 13 included in the control command unit 9.

In such an operation, the operation unit 21 determines whether the operation of the fluid actuator is good or not, so that this determination need not be performed by the control command unit 9, and the entire processing is slowed down as in the conventional example. This eliminates the situation and eliminates the need for such a processing program in the control instructor 9, thereby reducing the time and effort required for use and facilitating handling.

Further, a plurality of detection switches 7A, 7B, 7
Since the detection signals from C and 7D are sent to the controller 8 as serial signals, the number of wirings is small, and the detection switches 7A, 7B, 7
C, 7D wiring can be easily performed.

In one embodiment, the communication controller 34 of the controller 8 and the detection switches 7A, 7B, 7C, 7D installed on the cylinders 4A, 4B, 4C, 4D are connected to the communication units 44, 4D.
5, and the detection signals of the detection switches 7A, 7B, 7C, 7D are sequentially transmitted to the controller 8 as serial signals.
Each detection switch 7A, 7B, 7C, 7D is individually electrically wired to the controller 8, and the detection switches 7A, 7B, 7C,
It goes without saying that the 7D detection signal may be transmitted to the controller 8 as a parallel signal.

[0018]

As described above, according to the present invention, there is provided a controller having a communication device for receiving solenoid valve driving data for driving a plurality of solenoid valves connected to a manifold as a serial signal and converting the data into a parallel signal. A plurality of fluid actuators that operate by driving the solenoid valves according to the solenoid valve driving data received by the controller are provided with detection switches for detecting the operating states of the fluid actuators. The determination unit determines whether the operation of the fluid actuator is good or not based on the detection signal indicating the operation state of the fluid actuator that has been performed. Therefore, the control unit determines whether the operation of the fluid actuator is good or not, and the control command unit performs such processing. It becomes unnecessary and can be used without causing a situation in which the entire processing is slowed down as in the conventional example. In addition, a program for judging the quality of operation of the fluid actuator is not required on the control commander side, so that an electromagnetic control device which requires less labor and is easy to handle when used is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electromagnetic valve control device showing one embodiment of the present invention.

FIG. 2 is an electric circuit diagram of the solenoid valve control device.

FIG. 3 is a block diagram of a conventional solenoid valve control device.

[Explanation of symbols]

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H solenoid valve 2 manifold 4A, 4B, 4C, 4D fluid actuator 7A, 7B, 7C, 7D detection switch 8 controller 19 communication device 38 judgment device

Claims (1)

(57) [Claims] 1. A controller having a communication device for receiving solenoid valve drive data for driving a plurality of solenoid valves connected to a manifold as a serial signal and converting the serial signal into a parallel signal, wherein the controller receives the data. A plurality of fluid actuators operated by driving the solenoid valve by the solenoid valve drive data, a detection switch for detecting the operation state of these fluid actuators,
An electromagnetic valve control device, comprising: a controller provided with a determiner for determining whether the operation of the fluid actuator is good or not based on a detection signal indicating an operation state of the fluid actuator detected by the detection switch.