JPH01145704A - Positioning unit for programmable controller - Google Patents

Abstract

PURPOSE:To shorten the positioning time and to cope with plural control patterns by providing a selecting signal for selecting plural acceleration/ deceleration times on an interface, and also, providing additionally a memory which can store plural pieces of acceleration/deceleration times and selecting separately the acceleration time and the deceleration time. CONSTITUTION:When plural acceleration/deceleration times are stored in advance in an acceleration/deceleration time storage memory 15, an acceleration time selecting signal 13 and a deceleration time selecting signal 14 adapted to a program of a PC 1 are determined, and by these signals 13, 14, a positioning command to a positioning unit 2 is outputted. When the command is received, the acceleration/deceleration times and other necessary data which have been stored in a memory 7 of the positioning unit 2 and the acceleration/ deceleration time storage memory 15 are referred to, and positioning is executed by controlling the acceleration and deceleration. Accordingly, the acceleration/ deceleration times can be selected from plural acceleration/deceleration times. In such a way, the positioning time is shortened, and it is possible to cope with plural control patterns.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a positioning unit for a programmable controller (hereinafter referred to as rPcJ), and particularly to a positioning unit having a plurality of acceleration/deceleration patterns during positioning.

[Conventional technology]

A conventional device of this type will be explained with reference to FIGS. 3 and 4. FIG. 3 is a block diagram showing a conventional positioning unit for a PC, in which (1) is a PCl (2) is a positioning unit, (3) is an interface with the positioning unit (2), and (4) is a PC (1) interface, (5) is a microcomputer that performs positioning calculations based on commands from PC (1), (6) is system ROM, and (7) stores data necessary for positioning operation. In addition, the memory (8) is used as a work area for the operating system that controls the positioning unit (2), and is an external input/output interface.

However, the positioning unit (2) having the above configuration has P
Based on the positioning command from C(1), for example, the fourth
A positioning command is issued using the acceleration/deceleration pattern shown in the figure. At that time, the acceleration time (9A) and deceleration time (9A) required for the pattern
9B) is stored in the memory (7) in advance. In this way, when the positioning start command is output from the PC (1) to the positioning unit (2), the positioning unit (2)
gradually accelerates the output speed to the outside according to the acceleration process (1o) according to the acceleration time (9A) stored in advance, and when the set speed is eventually reached, the speed (11) is maintained.

After that, when approaching the target position, the pre-stored deceleration time (
9B), the vehicle gradually decelerates according to the deceleration process (12), and smoothly stops at the target position.

[Problem that the invention seeks to solve]

Since the conventional positioning unit (2) is configured as described above, the acceleration time and deceleration time during positioning operation are always controlled to be the same time, and the control is performed to accelerate slowly and then decelerate rapidly, or to accelerate rapidly and then slowly. It is not possible to control deceleration, and in some cases, more acceleration time and/or deceleration time than necessary is required, resulting in an unavoidable time loss in positioning.

Also, if you try to drive with a different acceleration/deceleration time, the acceleration/deceleration time will be reset to the memory of the positioning unit (2).
7), it is necessary to output a positioning start command after re-memorizing the information in step 7), which takes time and effort, and it is not possible to avoid difficulties in use.

The present invention has been made to solve the above problems,
It is an object of the present invention to provide a positioning unit that can appropriately select an acceleration/deceleration time from among a plurality of acceleration/deceleration times for each positioning operation, and can also separately select an acceleration time and a deceleration time.

[Means for solving problems]

The PC positioning unit according to the present invention has an interface with a selection signal for selecting a plurality of acceleration/deceleration times, is additionally equipped with a memory capable of storing a plurality of acceleration/deceleration times, and can individually select acceleration and deceleration times. It was designed so that it could be done.

[Effect]

According to the present invention, the memory stores a plurality of acceleration/deceleration times, and the acceleration/deceleration times are stored in advance by using the acceleration time selection signal and the deceleration time selection signal in the interface to provide commands according to the PC program. Select one of the acceleration times and select one of the deceleration times to operate the positioning unit for each positioning operation.

〔Example〕

Hereinafter, based on the embodiment shown in FIGS. 1 and 2, the same or equivalent parts as those in the conventional art will be given the same reference numerals, and the description thereof will be omitted, and the description will focus on the features of the present invention.

The device of this embodiment is provided with two acceleration time selection signals (13) and two deceleration time selection signals (14) between the interfaces (3) and (4). These signals are P
Turn the two signals ON10 by the program in C(1).
Express the value of "0.~3" by FF,
Each of the four acceleration time selection signals (13) and deceleration time selection signals (14) is configured to correspond to each other.

The selection of each signal is made in accordance with the contents of the user's program.
14) will be selected and received by the interface (4).

Further, in the apparatus of this embodiment, the positioning unit (2) is provided with an acceleration/deceleration time storage memory (15) for storing the plurality of acceleration times and deceleration times described above. Therefore, the acceleration/deceleration time selection signals (13), (14) from the interface (4)
), the acceleration/deceleration control is performed by referring to either acceleration time or deceleration time in a memory (15).

Therefore, the device of this embodiment operates as follows.

Acceleration/deceleration time storage memory (15) that stores multiple acceleration/deceleration times in advance
By storing the acceleration time selection signal (13) and deceleration time selection signal (14) in accordance with the program of the PC (1),
) are determined, and a positioning command to the positioning unit (2) is output based on these signals (13) and (14). When a command is received, the memory of the positioning unit (2) (
7) With reference to the acceleration/deceleration time and other necessary data stored in the acceleration/deceleration time storage memory (15), positioning is performed by controlling acceleration/deceleration as shown in FIG. 2, for example. In this embodiment, acceleration/deceleration control is performed by setting the deceleration time (9B) shorter than the acceleration time (9A). However, in the conventional case, the acceleration time (9A) and the deceleration time (9B) must be controlled to be the same time as shown in FIG. (See Figure 2) was forced to result in loss time.

Therefore, in the device of this embodiment, since the acceleration/deceleration time can be selected from a plurality of options, the positioning time can be shortened, and multiple control patterns can be handled without the need to reset the acceleration/deceleration time. Can be done.

〔Effect of the invention〕

As described above, according to the present invention, positioning can be performed in a short time, and a plurality of control patterns can be automatically applied in accordance with the program contents, thereby providing operational convenience.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a PC positioning unit according to the present invention, FIG. 2 is a diagram showing its control pattern, FIG. 3 is a diagram equivalent to FIG. 1 showing a conventional device, and FIG.
The figure is a diagram showing the control pattern. In the figure, (1) is pc. (2) is a positioning unit, (3) and (4) are interfaces, (13) is an acceleration time selection signal, (14) is a deceleration time selection signal, and (15) is an acceleration/deceleration time storage memory. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] In a positioning unit that is connected to a programmable controller via an interface and performs acceleration/deceleration control and issues positioning commands according to the program contents of the programmable controller, the interface is provided with a plurality of acceleration time selection signals and a plurality of deceleration time selection signals, respectively; In addition to selecting one of the acceleration time selection signal and deceleration time selection signal according to the above program contents,
The positioning unit includes a memory for storing the plurality of acceleration times and deceleration times, and selects an acceleration time and a deceleration time from the memory based on the acceleration time selection signal and deceleration time selection signal received by the interface, and performs acceleration and deceleration. A positioning unit for a programmable controller characterized by issuing a deceleration command.