JPH04361303A - Sequencer input method - Google Patents

Abstract

PURPOSE:To reduce cost by supplying a signal at an arbitrary level corresponding to each resistor through the single wiring to a voltage level selection part to reduces outside wirings to an input cord and to simplifies structure. CONSTITUTION:This sequencer input system receives signal from plural limit switches 4-7, which are not simultaneously turned on, by an input card 13, the limit switches 4-7 equipped with resistors 8-11 having various resistance values and the voltage level selection part in the input card 13 are connected by a single wiring 19, and the signals at arbitrary levels corresponding to the resistors 8-11 are supplied through this single wiring 19 to the voltage level selection part. The input card 13 are equipped with plural terminals A, B..., and the the plural voltage levels such as the arbitrary voltage levels 20V, 15V, 10V and 5V, for example, respectively corresponding to the resistors 8-11 are impressed to the respective terminals A, B.... Therefore, the signal at the level corresponding to the resistors 8-11 can be supplied from the voltage level selection part to any address of the input card.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a sequencer input method for sequentially controlling a slide unit.

0002

2. Description of the Related Art Conventionally, a cutting device having a slide unit as shown in FIG. is converted into an electrical signal, and the electrical circuit of this device is controlled in sequence. FIG. 4 is a side view of a cutting device having this slide unit, and FIG. 5 is a diagram showing the relationship between a limit switch and an input card.

This cutting device 100 includes a slide unit 102 having a cutting tool 101 at the tip, limit switches 103, 104, 105, and 106 for detecting the position and movement of this slide unit 102, and a relay box 1.
07, and a control box 109 which is a sequencer having an input card 108.

[0004] Limit switches 103, 104, 105
, 106 are the respective wirings 110, 111, 112, 1
13 to the relay box 107. This relay box 107 includes the wirings 110, 111, 112, 1
It is connected to the control box 109 via wires 114, 115, 116, and 117 corresponding to 13. The wiring 114
, 115, 116, and 117 are respectively connected to input terminals a, b, c, and d of the sequencer input card 108 in the control box 109 shown in FIG. Here, OO,0
1, 02, . . . indicate addresses of input cards. Note that W indicates the object to be cut.

[0005] Limit switches 103, 104, 105
, 106 do not operate at the same time, so if these positions are, for example, the preliminary retreat end, the original position, the deceleration position, and the forward end, when the slide unit 102 is moved to cut the workpiece W, during the movement process. four limit switches 103, 104, 10 operating at the predetermined positions;
5 and 106 are turned on with a time difference while sensing the position of the slide unit 102, and transmit a signal indicating the current operating position to the control box 109, thereby sequentially controlling the electric circuit of the device.

[0006]

[Problem to be Solved by the Invention] However, in this cutting device, the wiring from each limit switch is independently connected to the relay box, and the wiring from the relay box is also independently connected to the control box. is connected to the input card.

[0007] Therefore, this method has no problem when there are only a few limit switches, but when a large number of limit switches are used, the wiring section takes up most of the volume inside the control box. For,
The control box becomes larger. Further, there is a problem in that it takes a lot of time to find the corresponding necessary line when diagnosing a fault.

[0008] In order to solve this problem, it is conceivable to adopt a multiplex transmission device, but this multiplex transmission device is expensive and cannot be easily adopted because it requires a separate dedicated power source. There was a problem.

The present invention has been made to solve the above problems, and its purpose is to provide a sequencer input method that reduces the number of wires connected to an input card in a control box that is a sequencer.

0010

[Means for Solving the Problems] In order to solve the above problems, a sequencer input method according to the present invention is a sequencer input method in which signals from a plurality of limit switches that are not turned on simultaneously are received by an input card, and each limit switch is is configured by providing resistors with different resistance values, and connects these limit switches and the voltage level selection section in the input card with a single wire, and connects any one of the resistors corresponding to each of the resistors through this single wire. The level signal is supplied to the voltage level selection section.

[0011]

[Operation] The sequencer input method according to the present invention simplifies the structure because the number of wires connected to the input card in the control box that is the sequencer is reduced.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a cutting device having a slide unit using a sequencer input method according to the present invention, FIG. 2 is a diagram showing the connection relationship between a limit switch and an input card, and FIG. 3 is a diagram showing a voltage level selection section in the input card. FIG. 3 is a diagram showing the configuration.

This cutting device 1 includes a slide unit 3 having a cutting tool 2 at its tip, and contacts 4-1, 5-1, and 6 that do not operate at the same time to detect the position of this slide unit 3.
-1,7 limit switch 4,5,6,7 with -1
and opening/closing contact mechanisms 4-2, 5-2, and 6 that open and close the electric circuits of the limit switches 4, 5, 6, and 7, respectively.
-2, 7 - Resistors 8 with different resistance values connected in series with -2,
9, 10, 11, relay box 12, and input card 1
The control box 14 is a sequencer equipped with 3.

Limit switches 4, 5, 6, and 7 are connected to relay box 12 via respective wirings 15, 16, 17, and 18. In addition, limit switches 4, 5, 6,
Contactors 4-1, 5-1, 6-1, and 7-1 of 7 are set so that they will return to their original state by the force of a spring or the like when the slide unit 3 is removed or returned to its original position, so that they will not turn on at the same time. It has become.

In this embodiment, this relay box 1
2 is connected to an input card 13 in a control box 14, which is a sequencer, via only a single wire 19. However, in FIG. 2, only the case where it is connected to terminal A is shown. As shown in FIG. 3, the input card 13 has multiple terminals A, B, C,
. . , and each terminal A, B, C . A plurality of voltage level selection units 20 that provide voltage levels are connected. In this FIG. 3, 00, 01...
0B indicates the address of the input card. Note that W indicates the object to be cut, as in the conventional case.

With the configuration described above, the slide unit 3 having the cutting tool 2 at the tip moves in accordance with the sequence to contact the contacts 4-1, 5-1, 6-1, and the limit switches 4, 5, 6, and 7 respectively. When 7-1 is pressed and activated, the opening/closing contact mechanism 4-2, 5- inside the limit switch
2, 6-2, 7-2 open and close the electric circuit, and in turn resistors 8, 9, 10, 11 and wiring 15, 16, 17, 18.
The signal is transmitted to the relay box 12 via.

The signal from this relay box 12 is transmitted to the terminal A of the input card 13 via a single wiring 19.
A signal (voltage) at a level corresponding to each of the resistors 8, 9, 10, and 11 is input from the voltage level selection section 20 to the card 1.
A signal corresponding to one of the addresses 00 to 03 of No. 3 is supplied to sequentially control the electric circuit of the device.

[0018] In this embodiment, the number of wires from the relay box was reduced to one instead of the conventional four, but the wiring could be simplified if more wires were reduced to one. It goes without saying that it can be done.

[0019]

[Effects of the Invention] According to the sequencer input method according to the present invention, the external wiring connected to the input card can be significantly reduced, so the structure can be simplified, and failure diagnosis etc. can be performed in a short time. You will be able to do this. moreover,
Since the control box can be downsized, it is also possible to reduce the cost of the device.

[Brief explanation of drawings]

FIG. 1 is a side view of a cutting device having a slide unit using a sequencer input method according to the present invention.

[Fig. 2] A diagram showing the connection relationship between limit switches and input cards used in the sequencer input method according to the present invention.

FIG. 3 is a diagram showing the configuration of the voltage level selection section in the input card used in the sequencer input method according to the present invention.

[Fig. 4] Side view of a cutting device with a conventional slide unit

[Figure 5] Diagram showing the relationship between conventional limit switches and input cards

[Explanation of symbols]

1... Cutting device, 2... Cutting tool, 3... Slide unit, 4,
5, 6, 7...Limit switch, 8, 9, 10, 11...
Resistor, 12... Relay box, 13... Input card, 14...
Control box, 15, 16, 17, 18, 19...wiring,
20...Voltage level selection section.

Claims (1)

[Claims] 1. A sequencer input method in which signals from a plurality of limit switches that are not turned on at the same time are received by an input card, wherein each of the limit switches is configured by providing a resistor with a different resistance value, and these limit switches and the The voltage level selection section in the input card is connected by a single wiring, and a signal of an arbitrary level corresponding to each of the resistors is supplied to the voltage level selection section via this single wiring. Sequencer input method.