JP3312741B2 - Sequencer input contact setting circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an input contact setting circuit of a sequencer (programmable controller) used for inputting predetermined setting conditions to an input card of the sequencer (programmable controller).

[0002]

2. Description of the Related Art Conventionally, when inputting a signal to a sequencer, input devices, for example, input cards having as many input signal contacts as push buttons are used. Also, input /
When an output card is used, it is known to check the state of an input signal while scanning the output card side.

[0003]

The former of the prior arts has the problem that the number of contacts of the input card is required to be large. In the latter case, a scan circuit is required on the output card side, the software is complicated, and two types of cards, an input card and an output card, are required, resulting in waste and a response delay. Had. The present invention has been made in view of the above-mentioned problems of the conventional technology, and has as its object to reduce the number of contacts of an input card as much as possible when externally inputting a signal to a sequencer. An object of the present invention is to provide an input contact setting circuit for a sequencer.

[0004]

A solution for the present invention to solve the above problems is the input contact setting circuit for inputting a predetermined condition to the sequencer input cards, push button switch Toko push button switch for interrupting the flow of current A push button connecting portion composed of two diodes each having a cathode connected to one of the contacts is arranged in a matrix, and the other of the push button switches
Connect all the contacts of the
The anode of one diode placed in the same row of
At the input signal contact of the input card corresponding to each row
Connected and placed in the same column of the matrix
The input cards corresponding to the columns
Connected to the input signal contact of the input .

[0005]

When the pushbutton switch is turned on, the setting condition is input to the contact of the input card corresponding to the pushbutton switch that has been turned on.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of an input contact setting circuit of a sequencer according to the present invention and a connection diagram with an input card, FIG. 2 is an enlarged view of a push button connection portion, and FIG. 3 is a plan view of a stocker model setting panel.

In a work stocker (storage) of an automobile manufacturing plant, each lane (1) is set on a stocker model setting panel 1 as shown in FIG. Input to the inside of the sequencer by pressing the model (PP7, PL3, P20) setting pushbutton switch 2 and the displacement (1.5 liter, 1.6 liter) setting pushbutton switch 2 provided for each lane to 8 lanes. The setting conditions are input via the card.

Conventionally, when setting conditions are inputted into the sequencer, the model setting push button switches 2 (24) and the displacement setting push button switches 2 (24) provided for each lane (1 to 8 lanes) are provided. The input signal contacts (48 contacts) of the input card 3 are used by the number of the push button switches 2 for a total of 48 push button switches 2, that is, 16 push button switches 2 and the spare push button switches 2 (8 switches) for model setting. .

Therefore, in order to reduce the number of contacts of the input card as much as possible, as shown in FIG. 1, the push button connection portions 5 are arranged in an 8 × 6 matrix as the input contact setting circuit 4 of the sequencer as follows. And was electrically connected to it.

A push button switch 2 of a push button connection portion 5 arranged in an 8 × 6 matrix forming an input contact setting circuit 4 of the sequencer shown in FIG. 1 and a push button arranged on a stocker model setting panel 1 shown in FIG. The correspondence with the switch 2 is as follows. 3 from the first column of the first row shown in FIG.
In the column, set the push button switch 2 for model setting of 1 lane to model PP
7, PL3, and P20 are arranged in this order. Further, a spare pushbutton switch 2 for setting the model is arranged in the fourth row, and the displacement setting pushbutton switch 2 is arranged in the fifth to sixth rows with a displacement of 1.5 liters and 1.6. They were arranged in the order of liters. Similarly, on the second to eighth lines, each model of 2 lanes to 8 lanes and the respective displacement setting push button switches 2 are arranged.

As shown in FIG. 2, the push-button connecting portion 5 constituting the input contact setting circuit 4 of the sequencer is a contact input device which comprises two contacts 2a, 2b and a movable piece 2c.
c is pressed against the two contacts 2a and 2b,
a push button switch 2 for electrically connecting a to the contact 2b;
The push button switch 2 includes two diodes 6 and 7 having cathodes 6c and 7c connected to a contact 2b on the positive voltage side.

In the input contact setting circuit 1 of the sequencer, first, all the contacts 2a of each of the push button switches 2 constituting the push button connection section 5 are connected to the ground line E as shown in FIG. Next, the anode 6a of one diode 6 connected to the model setting push button switch 2 among the push button switches 2 is connected to the corresponding lane input contacts 3a to 3h of the input card 3, and the anode 7a of the other diode 7 is connected to the input card. 3 are connected to the corresponding model setting contacts 3i to 3l. Further, the anode 6a of one diode 6 connected to the displacement setting push button switch 2 among the push button switches 2 is connected to the corresponding lane input contacts 3a to 3h of the input card 3, and the anode 7a of the other diode 7 is connected to the input card. 3 corresponding to the displacement setting contacts 3m and 3n.

The contacts (3a to 3n) of the input card 3
3a to 3h correspond to 1 to 8 lanes, 3i to 3l correspond to models PP7, PL3, and P20 and spares, and 3m and 3n correspond to 1.5 liter and 1.6 liter displacements.

The operation of the present invention configured as described above will be described. For example, in the case of setting the condition that the model is PL3 and the displacement is 1.6 liters in three lanes, the push button connection unit 5 forming the matrix of 8 rows × 6 columns shown in FIG.
First, by pressing the push button switch 2 of the push button connection portion 5 arranged in the second column of the third row, each of the diodes 6 in the second column of the third row from the contact 3c and the contact 3j of the input card 3
7 and the push-button switch 2, a current flows into the ground wire E, the voltage level of the contact 3c and the contact 3j of the input card 3 becomes L level, and the condition of the three-lane model PL3 is that the contact 3c and the contact 3j of the input card 3 Is input to

Next, by pressing the push button switch 2 of the push button connection unit 5 arranged in the third row and the sixth column, the input card 3
Current flows into the ground line E via the contact 3c and the contact 3n, the diodes 6 and 7 in the third row and the sixth column, and the push button switch 2, and the voltage level of the contact 3c and the contact 3n of the input card 3 becomes L level. And the condition that the displacement of three lanes is 1.6 liters is input to the contact points 3c and 3n of the input card 3.

Similarly, when setting the condition that the model is PP7 and the displacement is 1.5 liters in eight lanes, first, the push button switch 2 of the push button connection part 5 arranged in the eighth row and the first column must be pressed. As a result, current flows into the ground line E via the contacts 3 h and 3 i of the input card 3, the diodes 6 and 7 in the first column of the eighth row, and the pushbutton switch 2 from the contact 3 i.
The voltage level of the contact 3h and the contact 3i becomes L level,
The condition of the lane model PP7 is the contact 3 of the input card 3.
h and the contact 3i.

Next, by pressing the push button switch 2 in the fifth row of the eighth row, the contacts 3h and 3m of the input card 3 are connected to the diodes 6, 7 in the fifth column of the eighth row and the push button switch 2 through the contact 3m. Current flows into the ground wire E and the input card 3
The voltage level of the contact 3h and the contact 3m becomes L level.
Input card 3 is the condition of 1.5 liters of lane displacement
Are input to the contact 3h and the contact 3m.

Accordingly, the setting conditions of the forty-eight push button switches 2 can be input into the sequencer by the input card 3 having 14 (3a to 3n) contact points.

[0019]

As described above, according to the present invention, the number of contacts of the input card can be reduced. Further, since an output card is not required, the man-hour for software design can be reduced. Furthermore, the response delay is smaller than when using an input / output card.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an input contact setting circuit of a sequencer according to the present invention and a connection diagram of an input card;

FIG. 2 is an enlarged view of a push-button connection portion constituting an input contact setting circuit of the sequencer according to the present invention.

FIG. 3 is a plan view of a stocker model setting panel.

[Explanation of symbols]

2 ... Push button switch (contact device), 3 ... Input card, 4
... Input contact setting circuit of sequencer, 5 ... Push button connection part (connection part), 6,7 ... Diode, 6c, 7c ... Diode cathode.

Claims (1)

(57) [Claims] In an input contact setting circuit for inputting predetermined conditions to an input card of a sequencer, a push button switch for interrupting a current flow and a cathode connected to one contact point of the push button switch . A pusher consisting of two diodes
The button connection part is arranged in a matrix, and the push button switch
Connect all other contacts of the
Anode of one diode on the same row
Collectively for the input signals of the input card corresponding to each row
Connected to the contacts and placed in the same row of the matrix
The anodes of the diodes are grouped together and
An input contact setting circuit for a sequencer, which is connected to an input signal contact of a power card .