JPH08234654A - Sequence control circuit training device - Google Patents

Abstract

PURPOSE: To provide a sequence control circuit training device with which sequence control can be studied by selecting either relay circuit or PC (programmable controller) and constituting an actual sequence control circuit. CONSTITUTION: This device is provided on a panel with an input equipment 2 such as operating switch and limit switch, an output equipment 3 including motor, pilot lamp etc., a power-supply circuit 4 consisting of each leakage breaker, transformer etc., PC main unit 5 comprising a sequence control circuit, a relay group 6 comprising a sequence control circuit, a power relay group driving the output equipment such as a motor requiring power, and enables an optional selection of either PC main unit 5 to comprise a sequence control circuit or the relay group 6 to comprise a sequence control circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sequence control circuit training device capable of configuring a sequence control circuit with a relay or a PC (programmable controller) for practical training.

[0002]

2. Description of the Related Art Conventionally, it is known that a sequence control circuit training device of this type is manufactured exclusively for a relay circuit or a PC.

[0003]

At present, the sequence control circuit is generally composed mainly of a PC, but even in the case of using the PC, an output device requiring power (for example, a motor or a solenoid). When driving (valve etc.), there are many cases where the output part is composed of a power relay.

Further, in an apparatus in which the sequence program is hardly changed, the sequence control circuit may be composed of only the relay. Therefore, it is useful for the designer of the sequence control circuit, the maintenance worker, and the like to learn by practicing both the case where the sequence control circuit is composed mainly of the PC and the case where the sequence control circuit is composed only of the relays.

However, in the conventional sequence control circuit training device, both the relay circuit and the PC are not arranged, and the relay circuit or the PC cannot be arbitrarily selected. Therefore, the training device dedicated to the relay circuit is not provided. Both the PC training device and the PC training device have to be prepared, and the handling is complicated, the usability is poor, the space cannot be saved, and the number of parts is increased.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to select a relay or a PC as desired and to configure a sequence control circuit. It is intended to provide a sequence control circuit training device capable of actually configuring and learning sequence control.

[0007]

In order to solve the above problems, the present invention comprises an input device such as an operation switch and a limit switch, an output device such as a motor and an indicator lamp, an earth leakage breaker and a transformer. A power supply circuit, a PC main body that constitutes a sequence control circuit, a relay group that constitutes the sequence control circuit, and a power relay group that drives an output device such as a motor that requires power are arranged on a panel. Select the PC main unit to configure the sequence control circuit,
Alternatively, the relay group can be selected to form a sequence control circuit, or can be arbitrarily selected.

Further, a PC control circuit wiring set and a relay control circuit wiring set are provided and selectively used.

Further, in the PC control circuit wiring set, a part of the wiring is connected in advance to the operation switch.

[0010]

The input device, the output device, the power supply circuit and the like are commonly used regardless of whether the sequence control circuit is composed of the relay group or the PC main body. Then, either the relay group or the PC main body is arbitrarily selected, and the sequence control can be learned while configuring the sequence control circuit.

Further, the wiring set for the PC control circuit and the wiring set for the relay control circuit are selectively used, and the wiring required for each circuit is supplied without excess or deficiency.

Further, in the PC control circuit wiring set, a part of the wiring is connected in advance to the operation switch, so that the wiring work can be performed efficiently.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a configuration diagram of a sequence control circuit training device according to the present invention, and FIG. 2 is a mounting perspective view of the same.

As shown in FIG. 1, the sequence control circuit training device 1 includes an input device 2 as a main control device, an output device 3, a power supply circuit 4, a PC body 5, and a relay group 6.
And a power relay group 7 and the like. Further, the PC main body 5 is connected to a program input device 8 having a display and an input key capable of inputting a sequence program into the memory of the PC main body 5 and searching the contents of the memory. Note that FIG. 1 shows a state in which a sequence control circuit is configured in the PC body 5 (connection between devices is shown by a solid line).

Input device 2, output device 3, power supply circuit 4, P
Control devices such as the C main body 5 and the relay group 6 are arranged on one panel 10 as shown in FIG.

As shown in FIG. 2, the input device 2 includes a push button switch 11, operation switches such as a snap switch (not shown) and a changeover switch (not shown), and a limit switch 1.
2, etc., which are fixed to the mounting brackets 13 and 14, respectively.

The output device 3 is a motor (AC motor, DC
Motor) 15, solenoid valve 17 for driving air cylinder 16, indicator lamp 18, counter 19, etc.,
It is fixed to the panel 10 directly or via a mounting bracket 20.

The power supply circuit 4 includes an earth leakage breaker 21, a transformer (200V / 100V) 22, a magnet switch 23.
And a circuit protector 24 and the like, and includes a constant voltage power supply (DC 24V or the like) 25, an operation preparation circuit (not shown), and the like.

The PC main body 5 stores a sequence program in a memory and constitutes a sequence control circuit by so-called software. An operator operates the display and input keys of the program input device 8 to input the sequence program into the memory. .

The relay group 6 is an array of a plurality of so-called miniature relays having a contact capacity that is not so large. The sequence control circuit is configured by so-called hardware, which is connected via wiring. The relay group 6 also includes a timer and a counter.

The power relay group 7 constitutes an output circuit for driving output devices such as the motor 15 and the solenoid valve 17 which require power and has a large contact capacity. The relay group 6 constitutes a sequence control circuit. It is necessary for the output circuit that requires power in both the case of forming the sequence control circuit and the case of forming the sequence control circuit in the PC body 5. That is, the output contacts of the PC main body 5 and the output contacts of the output circuit of the relay group 6 drive output devices such as the motor 15 and the solenoid valve 17 which require power via the power relay group 7.

The operation of the sequence control circuit training device 1 configured as described above will be described. Here, it is assumed that the sequence control circuit training device 1 is set for a PC as an initial state. In this state, when configuring the sequence control circuit with the relay group 6, first, the earth leakage breaker 21 is turned off and the power line (AC100V or DC24
Switch the wiring from the PC connection to the relay connection.

Next, the input / output terminals 27, 2 of the PC body 5
8, the wiring of the input device 2 such as the push button switch 11 and the limit switch 12 and the output device 3 such as the indicator lamp 18 is removed, and the removed wiring is connected to the terminal block 26 of the relay group 6.
Attach to Also, the wiring from the output terminal 28 of the PC body 5 to the power relay group 7 is removed, and the removed wiring is attached to the terminal block 26 of the relay group 6. In addition, 29 is a wiring terminal block.

Further, in the relay group 6, the coil terminal and the contact terminal of each relay are wired via the terminal block 26 in accordance with the ladder diagram shown in the sequence circuit drawing to form a sequence control circuit.

After the sequence control circuit is completed, it is confirmed by looking at the sequence circuit drawing whether or not it is configured as the circuit. After confirmation, turn on the earth leakage breaker 21 and
After operating the operation preparation circuit, the push button switch 11 or the like is operated to rotate the motor 15 according to the sequence control circuit, move the air cylinder 16 forward or backward by the solenoid valve 17, and turn on the indicator lamp 18. Check if

If the output device 3 does not operate according to the sequence control circuit, the earth leakage breaker 21 is turned off and the inspection and the operation confirmation are repeated. If the sequence control circuit has an error, correct the circuit. With such work, you can learn while practicing sequence control by relay.

Next, when the sequence control circuit is configured by the PC main body 5 from the state where the sequence control circuit is configured by the relay group 6, first, the earth leakage breaker 21 is turned off and the power supply line (AC100V). And DC24V) switch the wiring from the relay connection to the PC connection.

Next, from the terminal block 26 of the relay group 6 to the input device 2 such as the push button switch 11 and the limit switch 12.
Also, the wiring of the output device 3 such as the indicator lamp 18 is removed, and the removed wiring is connected to the input / output terminals 27, 28 of the PC body 5.
Attach to In addition, the wiring from the terminal block 26 of the relay group 6 to the power relay group 7 is removed, and the removed wiring is attached to the output terminal 28 of the PC body 5.

In the above embodiment, the sequence control circuit is changed while switching the wiring. However, a PC control circuit wiring set and a relay control circuit wiring set are provided so that all the wirings can be recombined. Good. In this way, the wiring for each circuit is supplied without excess or deficiency. At this time, in the PC control circuit wiring set, by connecting a part of the wiring to the operation switch in advance, the wiring work can be performed efficiently.

Further, the earth leakage breaker 21 is turned on (however,
For the power supply line for operating the output device 3, turn off the corresponding circuit protector 24), and operate the display and input keys of the program input device 8 according to the ladder diagram (or flow chart) described in the sequence circuit drawing. Then, the sequence program is input to the memory.

The sequence program is stored in the PC main body 5
As a method of inputting to the memory of the PC, a method of directly inputting each step while operating the program input device 8 or a method of creating a sequence program off-line and then immediately sending the program data to the PC main body 5 via the program input device 8 There is a way to enter into the memory of.

After the input operation of the program is completed, it is confirmed whether or not the circuit is constructed according to the circuit by operating the display and the input keys of the program input device 8 without operating the input / output devices 2 and 3.

After the confirmation, the operation preparation circuit is activated to put the circuit protector 24 into the on state, and the push button switch 11
Etc., operate the motor 1 according to the sequence control circuit.
5 is rotated, whether the air cylinder 16 is moved back and forth by the solenoid valve 17, and whether the indicator lamp 18 is turned on.

If the output device 3 does not operate according to the sequence control circuit, the circuit protector 24 is turned off, and the program input device 8 repeats the program correction and operation confirmation. By such work, it is possible to learn while practicing sequence control by the PC (handling of the PC, input method of the program, etc.).

[0035]

As described above, according to the present invention, since the common equipment is used, the training device dedicated to the relay circuit and the P
Space saving and reduction of the number of parts can be achieved by having both of the C-only training devices individually. Further, since the common input / output device is used, it is possible to easily understand the advantages and disadvantages of the sequence control by the relay, the advantages and disadvantages of the sequence control by the PC, and the respective differences and common points.

By providing the PC control circuit wiring set and the relay control circuit wiring set, the wiring for each circuit is supplied without excess or deficiency.

Further, in the PC control circuit wiring set, a part of the wiring is connected in advance to the operation switch, so that the wiring work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a sequence control circuit training device according to the present invention.

FIG. 2 is a mounting perspective view of a sequence control circuit training device according to the present invention.

[Explanation of symbols]

1 ... Sequence control circuit training device, 2 ... Input device, 3 ...
Output device, 4 ... Power supply circuit, 5 ... PC main body, 6 ... Relay group, 7 ... Power relay group, 8 ... Program input device, 1
0 ... Panel, 11 ... Pushbutton switch, 12 ... Limit switch, 15 ... Motor, 16 ... Air cylinder, 17 ... Solenoid valve, 18 ... Indicator light, 21 ... Earth leakage breaker, 2
2 ... Transformer, 23 ... Magnet switch, 24 ... Circuit protector, 25 ... Constant voltage power supply.

Claims (3)

[Claims] 1. An input device such as an operation switch and a limit switch, an output device such as a motor and an indicator lamp, a power supply circuit including an earth leakage breaker and a transformer, and a PC main body forming a sequence control circuit. A relay group that configures a sequence control circuit and a power relay group that drives an output device such as a motor that requires power are provided on a panel, and the PC main body is selected to configure the sequence control circuit. Alternatively, a sequence control circuit training device characterized in that the relay group is selected to configure a sequence control circuit or can be arbitrarily selected. 2. The sequence control circuit training device according to claim 1, wherein a PC control circuit wiring set and a relay control circuit wiring set are provided for selective use. 3. In the PC control circuit wiring set, a part of the wiring is connected in advance to the operation switch.
Sequence control circuit training device described.