JPH08137518A - Terminal for saving wiring - Google Patents

Abstract

PURPOSE: To provide a terminal for saving wiring capable of describing a program on the controller side without being conscious of whether it is a single solenoid or a double solenoid and easily making an exchange between the single solenoid and the double solenoid. CONSTITUTION: This terminal is provided with a connector 1 for input, a serial/ parallel conversion part 2 for converting serial data transmitted to the connector 1 for the input to parallel data, a switch 3 for setting an address, an address comparison part 4 for comparing the address data of the parallel data with the set value of the switch 3 for setting the address, a latch part 5 for holding the output data of the parallel data, a normal amplification part 6 for amplifying the output data from the latch part 5, an inversion amplification part 8 for inverting and amplifying the output data from the latch part 5 and the connector 7 for solenoid valve connection for receiving the output data from the normal amplification part 6 and the inversion amplification part 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input / output interface that serves as a medium for transmitting a command from a controller to a control target in equipment such as assembly and processing, and particularly transmits a command from the controller using serial communication. The present invention relates to a wire-saving terminal in which the number of signals required to do so can be omitted.

[0002]

2. Description of the Related Art As a prior art relating to the above-mentioned wire-saving terminal, a wire-saving system device disclosed in Japanese Patent Laid-Open No. 2-3804 is known. FIG. 3 shows a block diagram of a conventional technique. Reference numeral 1 is an input connector for receiving power supply and a command from a controller, and 2 is a parallel signal for converting a serial signal from the controller through the input connector 1. It is a serial / parallel conversion unit for conversion. Reference numeral 3 is an address setting switch for assigning a unique address to the terminal. An address comparison unit 4 compares the address data in the parallel signal converted by the serial / parallel conversion unit 2 with the set value of the address setting switch 3, and a command from the controller is issued to the terminal. It is determined whether or not the output signal is parallel-converted. Reference numeral 5 is a latch unit for holding and outputting the received output signal (so-called latch), and 6 is a forward rotation amplification for amplifying the signal from the latch unit 5 to a power sufficient for controlling the solenoid valve. It is a department. Reference numeral 7 is a solenoid valve connecting connector for outputting the signal amplified by the forward rotation amplifying section 6 to the solenoid valve.

According to the above prior art, the input connector 1
Power is always supplied from the outside so that the active circuit built into the terminal operates, and a control signal from an external sequencer or controller such as a personal computer is given to this input connector 1. Is sent from the controller as serial data. There are two sets of this data, and the address data for designating the address of the terminal to be output is placed first, and then the output data for output to the terminal is sent.

The two data sent are serial /
It is converted into parallel data by the parallel conversion unit 2. The serial / parallel conversion unit 2 converts the transmitted data into parallel data according to the order.
First, the address data is converted, and then the output data for controlling the solenoid valve is converted. When the address data and the output data are converted, the address data conversion end signal and the output data conversion end signal become valid, respectively.

Next, the address comparison unit 4 compares the address data converted into the parallel data with the set value of the address setting switch 3, and when both match, the address match signal becomes valid.

Then, when both the output data conversion end signal and the address coincidence signal become valid, the output data converted into the parallel data is held by the latch section 5. The output data held in the latch unit 5 is amplified by the forward rotation amplifying unit 6 so that sufficient power for operating the solenoid valve can be supplied, and this amplified output data is passed through the solenoid valve connecting connector 7. Drive the solenoid valve.

As described above, in the prior art, the target solenoid valve is operated by designating the address and the output data from the controller side.

[0008]

The solenoid valve described above has a built-in actuator called a solenoid, which is classified into a single solenoid and a double solenoid depending on the number of built-in solenoids. The single solenoid has one built-in solenoid, and the air path is switched by turning on / off the power supply to the solenoid. On the other hand, the double solenoid has two built-in solenoids, and by supplying electric power to one solenoid and stopping supplying electric power to the other solenoid, the air path can be switched. And when the power supply to the two solenoids is stopped at the same time, the double solenoid
The structure is such that the air path does not switch.

Due to the difference in characteristics between the single solenoid and the double solenoid, the single solenoid is a movable part such as a cylinder connected to the single solenoid when the power supply is cut off for some reason and the air path is switched. It is used in places where it can be driven. On the other hand, the double solenoid is used in a place where it is inconvenient to drive a movable part such as a cylinder connected to the double solenoid even if power supply is cut off. Here, it is conceivable that the power to the solenoid is cut off due to a power failure, an emergency stop by an operator, an emergency stop due to an abnormality of the system, or the like.

In a terminal having a structure in which an intended solenoid valve is operated by designating an address and output data from the controller side as in the prior art, one control output is required to control a single solenoid. Also, the control output is 2 to drive the double solenoid.
I need a book. In this way, the number of control output signals used varies depending on the type of solenoid valve.
There were the following problems.

First, it was necessary to create a program on the controller side in consideration of the object to be controlled. Further, when trying to change from a single solenoid to a double solenoid, the program on the controller side may be changed and the number of control signals may be insufficient.

The present invention has been made in view of the above problems of the prior art. The invention of claim 1 is conscious of whether the solenoid built in the solenoid valve is a single solenoid or a double solenoid. It is an object of the present invention to provide a wire-saving terminal in which a program on the controller side can be written without having to do so, and a single solenoid and a double solenoid can be easily replaced.

According to the second aspect of the present invention, the inverting amplifier can be externally added to the conventional type wire-saving terminal as much as necessary, the cost can be kept low, and the equipment designed with the conventional type wire-saving terminal can be provided. It is intended to provide a wire-saving terminal in which a single solenoid can be easily replaced with a double solenoid by being applied to the above.

[0014]

In order to solve the above-mentioned problems, a wire-saving terminal according to claim 1 is an input connector and a serial / serial converter for converting serial data sent to the input connector into parallel data. A parallel converter,
An address setting switch, an address comparison unit that compares the address data of the parallel data with a set value of the address setting switch, a latch unit that holds output data of the parallel data, and output data from the latch unit. A non-inversion amplification section that amplifies the output data from the latch section, an inversion amplification section that inverts and amplifies the output data from the latch section, and a solenoid valve connection connector that receives the output data from the non-inversion amplification section and the inversion amplification section. Then configured.

According to a second aspect of the present invention, the wire-saving terminal is provided with an input connector and an output connector in the inverting amplifier section of the first aspect, and the inverting amplifier section can be freely mounted as a unit separate from the wire-saving terminal body. Provided and configured.

[0016]

According to the invention of claim 1, an inverting amplifier is separately provided in addition to the conventional non-inverting amplifier. In this inverting amplifier, the normal amplifier and the signal High and Low are provided. The signal is inverted.

Two control signals are used for the double solenoid, but the combination of the two signals causes the double solenoid to operate as shown in Table 1 below. Therefore, in order to operate the double solenoid, two combinations of High and Low inverted as shown in Table 1 are required.

[0018]

[Table 1]

In the case of a single solenoid, the air path can be freely controlled by connecting only the signal from the non-inverted amplifier and sending a High or Low signal from the controller.

In the case of the double solenoid, the signal from the forward amplification section is connected to one solenoid, and the signal from the inverting amplification section is connected to the other solenoid. That is, from the controller, as in the case of the single solenoid,
By sending a High or Low signal, the two solenoids are provided with an inverted High or Low signal, so that the air path can be controlled freely.

As described above, in the structure of claim 1, even if the same control signal is sent from the controller, a signal necessary for driving the single solenoid or the double solenoid on the terminal side is generated. And act to supply.

According to the second aspect of the invention, since the inverting amplification section is configured as a separate unit, power supply and signal transmission to the inverting amplification section are performed through the input connector.
Signal output to the solenoid valve is performed through the output connector. The other operation is the same as the operation of claim 1.

[0023]

[Embodiment 1] Embodiment 1 of the present invention is shown in FIG. FIG. 1 is a block diagram of this embodiment. The wire-saving terminal of this embodiment is constructed by adding an inverting amplifier 8 to the structure of the prior art. A solenoid valve connecting connector 7 is connected to the output side of the inverting amplifier 8.

In this embodiment, the operation is almost the same as that of the prior art. However, when the double solenoid is used, the signal line of the non-inversion amplification section 6 and the inversion amplification section 8 are logically inverted. Operation is possible by connecting the signal lines one by one. That is, when viewed from the controller side, the intended operation can be performed by sending the same signal from the controller without considering the distinction between the single solenoid and the double solenoid.

According to the present embodiment, since the inverting amplifier 8 is incorporated in the wire-saving terminal, the transition from the single solenoid to the double solenoid can be performed very easily.

[0026]

[Embodiment 2] Embodiment 2 of the present invention is shown in FIG. FIG. 2 shows a configuration diagram of the present embodiment. In the wire-saving terminal of this embodiment, the inverting amplifier 8 of Embodiment 1 is configured as a unit different from the wire-saving terminal body 11. The inverting amplification section 8 is provided with an inverting amplification section input connector 9 and an inverting amplification section output connector 10, and the wiring-saving terminal body 1 is provided.
It is configured so that it can be attached to the terminal 1 and used in combination with the wire-saving terminal body 11. The wire-saving terminal main body 11 has an input connector 1, a serial / parallel conversion unit 2, an address setting switch 3, an address comparison unit 4, a latch unit 5, which is obtained by removing the inverting amplification unit 8 from the configuration of the first embodiment. The forward rotation amplifying section 6 and the solenoid valve connecting connector 7 are included.

The operation of this embodiment is almost the same as that of the first embodiment, but the signal applied to the inverting amplification section 8 is input to the inverting amplification section via the solenoid valve connecting connector 7 on the terminal body 11 side. 9 and the double solenoid is connected to the solenoid valve connector 7 and the inverting amplifier output connector 1
Power is supplied from two connectors of 0 and.

According to this embodiment, since the inverting amplifier 8 can be added only to the portion desired to operate as the double solenoid, the system can be constructed at low cost.

[0029]

According to the first aspect of the present invention, the single solenoid type solenoid valve and the double solenoid type solenoid valve can be controlled in exactly the same manner by the control signal from the controller. The load of the program on the controller side for controlling can be significantly reduced.

According to the invention of claim 2, the same effect as that of claim 1 can be obtained by mounting the inverting amplifier 8 as a separate unit on the conventional type wire-saving terminal. Further, the cost can be kept low by applying the inverting amplification section 8 to the conventional type wire-saving terminal.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a conventional technique.

[Explanation of symbols]

 1 Input Connector 2 Serial / Parallel Conversion Section 3 Address Setting Switch 4 Address Comparison Section 5 Latch Section 6 Forward Rotation Amplifier 7 Solenoid Valve Connection Connector 8 Inverting Amplifier 9 Inverting Amplifier Input Connector 10 Inverting Amplifier Output Connector 11 Wire-saving terminal body

Claims (2)

[Claims] 1. An input connector, a serial / parallel converter for converting serial data sent to the input connector into parallel data, an address setting switch, address data of the parallel data, and the address setting switch. An address comparison unit that compares the setting value of the switch, a latch unit that holds the output data of the parallel data, a normal amplification unit that amplifies the output data from the latch unit, and an output data from the latch unit. A wire-saving terminal comprising: an inverting amplification section that inverts and amplifies, and a solenoid valve connecting connector that receives output data from the normal rotation amplification section and the inverting amplification section. 2. The wire-saving connector according to claim 1, wherein the inverting amplifier section has an input connector and an output connector and is detachably provided as a unit separate from the wire-saving terminal body. Terminal.