JPS6057072A - Solenoid valve drive control system - Google Patents

Abstract

PURPOSE:To devise effective application of the mounting space of solenoid valves by making each solenoid receive address signals and on-off control signals related to a specific solenoid valve unit through common bus bars. CONSTITUTION:Bus bars 10 connected to a plurarity of solenoid valves comprises a power supply bus 12, an address bus 14, a data bus 16. A solenoid valve unit 20 has an input/output circuit 22, a CPU24, an internal memory 26, a solenoid driver 28, and a solenoid 30 in it. Address signals related to a specific solenoid valve unit are fed to the address bus 14 in the bus bars 10, and at the simultaneous timing with the signals on-off signals of the solenoid forming the above mentioned specific valve are fed to the data bus 16. In this manner, the number of wirings for each solenoid valve is sharply reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive control method for a solenoid valve, and more specifically, a plurality of solenoid valves are connected by a common bus line, and the drive current of the solenoid valve is controlled via the bus line. , relates to a drive control method for a solenoid valve that sends on/off signals.

In fluid control systems, when a large number of solenoid valves are used in equipment or machinery, manifold-type solenoid valves are used in which solenoid valves are connected in series and integrated into a manifold in order to simplify piping work and reduce installation space. It is being in this case,
Individual solenoid valves are generally operated by turning on and off current to each solenoid that constitutes the solenoid valve.

Since the control signal for on/off and the drive power line are common, if 10 solenoid valves were arranged, the number of electric wires would be 20, and the number of electric wires would be 20 for the double solenoid. In some cases, as many as 40 wires are required for one manifold. For this reason, various inconveniences have been pointed out, such as the expense of installing a large number of electric wires, and the fact that a considerable amount of space is required to arrange the bundles of electric wires, and that the bundles of electric wires can cause electrical problems. It has been.

As a result of extensive research, the inventors of the present invention have developed a common bus that includes a power supply bus, an address signal bus corresponding to the address of each solenoid valve, and a data bus for on/off control signals of each solenoid valve. On the other hand, each solenoid valve is provided with a microprocessor, and each solenoid valve and a bus line are connected via a connector, and each solenoid valve is connected to a common bus line. If the specific address signal and on/off control signal supplied are taken in and the solenoid included in the solenoid valve is energized or deenergized based on those signals, all of the above problems can be eliminated. understood.

Therefore, the present invention reduces the number of wiring lines for driving current and on/off signal transmission to a plurality of solenoid valves,
The present invention aims to provide a drive control system for a solenoid valve that makes effective use of the mounting space for the solenoid valve, eliminates the risk of electrical failure, and reduces manufacturing costs.

In order to achieve the above object, the present invention comprises a plurality of solenoid valves and a bus line connected to the solenoid valves and transmitting a solenoid drive current and an address signal and a data signal for the solenoid valves. The valve includes at least a central processing unit, an internal memory, a solenoid driver, and a solenoid, and the solenoid valve specified by the address signal sent to the bus line takes in the address signal and the data signal, and receives the data signal. It is characterized by energizing or deenergizing a solenoid that constitutes a solenoid valve.

Next, preferred embodiments of the electromagnetic valve driving system according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 1o indicates a bus line, and this bus line 10 basically consists of a power supply bus 12, an address bus 14, and a data bus 16. In this case, it is also possible to combine the address bus 14 and the data bus 16 and alternately send the address signal and the data signal by the line thus combined. It is also possible to form an address signal and a data signal as a rhordJ signal 18 as shown in FIG.

By the way, the bus line 1° configured as above includes a plurality of solenoid valve units 20a, 20b, 20C...
... is connected. In this embodiment, in practice, the bus line 10
are the solenoid valve units 20a, 20b, 20c.
Solenoid valve manifold 22a arranged corresponding to...
, 22b, 22c..., first connectors 24a, 24 provided on their side surfaces
b, 24c... and second connectors 26a, 2
6b, 26c, . . . are continuously connected. That is, the solenoid valve manifolds 22a adjacent to each other
Connector 24a to adjacent solenoid valve manifold 22b
The connector 24b of the solenoid valve manifold 22b is fitted into the connector 26b of the adjacent manifold 20.
The connector 26c of the connector 26c is connected continuously by fitting into the connector 26c of the connector 26c.

Note that each solenoid valve unit 20 is connected to each manifold via a connector. As can be understood from FIG. 1, the solenoid valve unit 20 includes an input/output circuit 22,
CPU 24, internal memory 26, solenoid driver 28
and a solenoid 30.

Therefore, in the above configuration, an address signal related to a specific solenoid valve unit is sent to the address bus 14 of the bus line 10, and the address signal related to the specified solenoid valve unit is sent to the data bus 16 at the same timing as the signal. On/off signals are sent to the solenoids that make up the As a result, the input/output circuit 22, which also serves as an interface, takes in only the on/off signal related to its own address because it constantly monitors the address signal. On the other hand, internal memory 26
is the signal related to the current on/off state of the solenoid.
In order to send the signal to the PU 24, the CPU 24 compares the conventional on/off signal with the newly acquired signal,
If different, this is sent as a new command signal to the solenoid driver 28 via an amplifier (not shown).

As a result, the solenoid 3o is energized or deenergized based on the new on/off signal based on the predetermined current being supplied to the solenoid driver 28 from the power supply bus 12. In this case, the new on/off signal will be introduced into the internal memory 26 via the CPU 24, and the old data will be rewritten. In addition, in such a configuration, the current of the solenoid driver 28 that energizes the solenoid 30 is constantly monitored, and the signal is sent to the CPU 24.
The signal is sent from the input/output circuit 22 to the bus line 10 via the input/output circuit 22. That is, if this signal is sent to the data bus 16 and at the same time an address signal related to the solenoid valve is sent to the address bus 14 and introduced into a control device (not shown), the solenoid 30 can be energized or deenergized. The status will be confirmed by the controller.

According to the present invention, as described above, a plurality of solenoid valves are connected by a common bus line, and each solenoid valve unit is provided with a CPU internal memory, etc., and is fed by the common bus line. The solenoid of the solenoid valve is energized or deenergized based on the address signal and data signal associated with each solenoid valve. Therefore, the amount of wiring for each solenoid valve is greatly reduced, which not only secures useful space, but also eliminates electrical interference by eliminating bundles of wires, and furthermore, the energization of the solenoid that makes up the solenoid valve becomes easier.・You can also reliably check the state of reduced energy. Therefore, remarkable effects such as improved reliability of the device as a whole can be obtained.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. It is.

[Brief explanation of drawings]

FIG. 1 is a block wiring diagram of the device of the present invention, FIG. 2 is an explanatory diagram of signals transmitted when the address bus and data bus are integrated in the block wiring diagram shown in FIG.
The figure is an explanatory diagram showing a coupling relationship between a manifold and a solenoid valve. lO... Lotus wire 12... Power bus 14... Address bus 16... Data bus 18... w
ord signals 20a, 20b, 20c...Solenoid valve unit 2
2a, 22b, 22c...Solenoid valve manifold 24a, 24b, 24c...Connector 26a
, 26b, 26c... Connector 22... Input/output circuit 24... CPU 26... Internal memory 28... Solenoid driver 30... Solenoid patent applicant Sintered Metal Industry Co., Ltd.

Claims (1)

[Scope of Claims] (11) Consisting of a plurality of solenoid valves and a bus line connected to the solenoid valves and transmitting a solenoid drive current, an address signal and a data signal of the solenoid valves, the solenoid valves are arranged at least in the central A solenoid valve that includes an arithmetic unit, an internal memory, a solenoid driver, and a solenoid and is specified by an address signal sent to the bus line takes in the address signal and a data signal, and configures the solenoid valve by the data signal. A drive control method for an electromagnetic valve characterized by energizing or energizing a solenoid that performs a control operation. A solenoid valve drive control method that compares the signal with a newly acquired data signal, and only when the two signals differ, sends a solenoid energization or deenergization signal to the solenoid driver based on the new signal. (3) In the method described in claim 1, a signal indicating the energization/power of the solenoid is derived to the bus line together with the address signal through the central processing unit, and the control device controls the control device based on this signal. A solenoid valve drive control method that involves checking the energization/deenergization status of the solenoid.