JP2725764B2 - Sequence control circuit training 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 sequence control circuit training apparatus in which a sequence control circuit can be configured and practiced with a relay or a PC (programmable controller).

[0002]

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

[0003]

At present, the sequence control circuit is generally composed mainly of a PC. However, even when the PC is used, an output device (for example, a motor or a solenoid) which requires power is required. When driving valves, etc.), there are many cases where the output section is configured by a power relay.

[0004] Further, for a device that hardly changes a sequence program, a sequence control circuit may be constituted by only relays. Therefore, it is useful for a sequence control circuit designer or a maintenance worker to learn while performing both the case where the sequence control circuit is mainly composed of a PC and the case where the sequence control circuit is mainly composed of a relay.

However, in the conventional sequence control circuit training apparatus, since both the relay circuit and the PC are not arranged and the relay circuit or the PC cannot be selected arbitrarily, the training apparatus dedicated to the relay circuit is used. And a training device for exclusive use of a PC must be prepared, so that the handling is complicated, the usability is poor, the space cannot be saved, and the number of parts increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to arbitrarily select any one of a relay and a PC to implement a sequence control circuit. It is an object of the present invention to provide a sequence control circuit training apparatus that can be actually configured to learn sequence control.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention comprises input devices such as operation switches and limit switches, output devices such as motors and indicator lights, and earth leakage breakers and transformers. A power supply circuit, a PC body constituting a sequence control circuit, a relay group constituting a sequence control circuit, and a power relay group driving an output device such as a motor requiring power are arranged on a panel. Select the PC itself to configure the sequence control circuit,
Alternatively, a sequence control circuit can be configured by selecting the relay group, or can be arbitrarily selected.

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

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 constituted by a relay group or the PC 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 necessary wiring for each circuit is supplied without excess or shortage.

Furthermore, in the wiring set for the PC control circuit, since a part of the wiring is connected to the operation switch in advance, the wiring work is 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 apparatus according to the present invention, and FIG. 2 is a mounting perspective view of the same.

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

Input device 2, output device 3, power supply circuit 4, P
Control devices such as the C 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 and the like are fixed to the mounting brackets 13 and 14, respectively.

The output device 3 includes a motor (AC motor, DC
A motor) 15, a solenoid valve 17 for driving an air cylinder 16, an indicator light 18, a counter 19, and the like.
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, etc., and includes a constant voltage power supply (24 VDC, etc.) 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 to the memory. .

The relay group 6 is formed by arranging a plurality of so-called miniature relays each having a contact capacity not so large. A sequence control circuit is constituted by so-called hardware by being connected by wires through the intermediary. The relay group 6 includes a timer, a counter, and the like.

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

The operation of the sequence control circuit training apparatus 1 configured as described above will be described. Here, it is assumed that the sequence control circuit training apparatus 1 is set for a PC as an initial state. When a sequence control circuit is configured with the relay group 6 in this state, first, the earth leakage breaker 21 is turned off, and the power supply line (AC100V or DC24V) is turned off.
V) is switched from the connection for the PC to the connection for the relay.

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 wiring of the output device 3 such as the indicator light 18 are 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 main 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. 29 is a wiring terminal block.

Further, in the relay group 6, according to the ladder diagram described in the sequence circuit diagram, the coil terminals and the contact terminals of each relay are wired via the terminal block 26 to form a sequence control circuit.

When the sequence control circuit is completed, it is confirmed whether or not the circuit is configured as shown in the sequence circuit drawing. After confirmation, the earth leakage breaker 21 is turned on,
After the operation preparation circuit is operated, 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 and backward by the solenoid valve 17, and turn on the indicator lamp 18. Make sure.

If the output device 3 does not operate according to the sequence control circuit, the earth leakage breaker 21 is turned off, and inspection and operation confirmation are repeated. If there is an error in the sequence control circuit, correct the circuit. By such a work, it is possible to learn while performing sequence control by the relay.

Next, when the sequence control circuit is constituted by the PC body 5 from the state in which the sequence control circuit is constituted by the relay group 6, first, the earth leakage breaker 21 is turned off, and the power supply line (AC100V) is turned off. And 24 VDC) are switched from connection for relay to connection for PC.

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

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

Further, the earth leakage breaker 21 is turned on (however,
The power supply line for operating the output device 3 is set to a state where the corresponding circuit protector 24 is cut off), and the display and input keys of the program input device 8 are operated in accordance with the ladder diagram (or flowchart) described in the sequence circuit diagram. And input the sequence program to the memory.

Note that the sequence program is stored in the PC main body 5.
There are two methods of inputting data to the memory of the PC: a method of inputting each step while directly operating the program input device 8, and a method of creating a sequence program offline and then immediately transmitting the program data via the program input device 8 to the PC main unit 5. There is a way to input to the memory.

When the input operation of the program is completed, it is confirmed whether or not the input / output devices 2 and 3 are not operated by operating the display and the input keys of the program input device 8 to determine whether or not the circuit is configured as the circuit.

After the confirmation, the operation preparation circuit is activated to turn on the circuit protector 24 and the push button switch 11
Operate the motor 1 according to the sequence control circuit.
It is confirmed whether or not 5 rotates, whether the air cylinder 16 moves forward and backward 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 the operation check. Through such operations, it is possible to learn the sequence control by the PC (the handling of the PC, the input method of the program, etc.) while practicing.

[0035]

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

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

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

[Brief description of the drawings]

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

FIG. 2 is a mounting perspective view of a sequence control circuit training apparatus 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 body, 6 relay group, 7 power relay group, 8 program input device, 1
0 ... panel, 11 ... push button 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)

(57) [Claims] 1. An input device such as an operation switch or a limit switch, an output device such as a motor or an indicator light, a power supply circuit configured by an earth leakage breaker or a transformer, and a PC body configuring a sequence control circuit. A relay group forming a sequence control circuit and a power relay group driving an output device such as a motor requiring power are arranged on a panel, and the PC main body is selected to form a sequence control circuit, or Alternatively, a sequence control circuit training apparatus, wherein a sequence control circuit is configured by selecting the relay group or arbitrarily selectable. 2. The sequence control circuit training apparatus according to claim 1, wherein a wiring set for a PC control circuit and a wiring set for a relay control circuit are provided and selectively used. 3. The PC control circuit wiring set, wherein a part of the wiring is connected to the operation switch in advance.
The described sequence control circuit training device.