JPH01106106A - Data transfer method for sequencer transferring many data by small number of input/output lines - Google Patents

Abstract

PURPOSE:To realize transmission/reception of a large quantity of data to an external control panel by a sequencer of small capacity by dividing the input/ output line of the sequencer into a data transfer line and a count value transfer line and performing the transmission/reception of data to said control panel with combination of the signal values of both transfer lines. CONSTITUTION:The combination signals of four signals I-IV received from a data transfer line 7 of a sequencer 1 and four signals (1, 2, 1+2, 4) received from a count value transfer line 8 of the sequencer 1 respectively are sent to a converter 9. The converter 9 converts these combination signals into desired many signals (eight input signals and eight output signals) and sends them to an external control panel 2. Thus it is possible to transmit and receive desired 16 pieces of signals on seven lines (four pieces of the line 7 and three pieces of the line 8) of the sequencer 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is suitable for transmitting a large number of data signals to/from an external operation panel using a small input/output line in a sequencer. This relates to a data transfer method for a sequencer that sends.

[Conventional technology]

As shown in FIG. 2, a large number of input/output signals are sent in and out between the sequencer 1 and the external operation panel 2, but normally the signals are sent in and out in a one-to-one relationship. That is, as shown in the figure, for example, if the output line 3 of the sequencer 1 is 8 lines and the input line 4 is 8 lines, the corresponding external operation panel will have 8 output side signals 5 and 8 input side signals 6. (A total of 16 signals correspond to the signals displayed in 4 lines). Therefore, a large number of data can be stored on the external operation panel 2.
In order to send in and out, the sequencer 1 needs the same number of input/output lines, which requires a large-capacity sequencer 1, and the wiring connecting the sequencer 1 and the external operation panel 2 becomes complicated. The drawback is that it occupies a lot of land.

[Problem that the invention seeks to solve]

The present invention was created to solve the above-mentioned drawbacks,
A small-capacity sequencer can send and receive large amounts of data, and
It is an object of the present invention to provide a data transfer method for a sequencer that simplifies the connection between a sequencer and an external operation panel and transfers a large amount of data using a small input/output line that prevents the occupation of space.

[Means for solving problems]

To this end, the present invention divides the input/output lines of the sequencer into a plurality of data transfer lines and count value transfer lines, and uses a combination of the signal values of both lines, similar to frequency modulation, to convert the input and output lines into a desired number of data transfer lines. The present invention is characterized by a data transfer method for a sequencer that transfers a large amount of data using small input/output lines formed to convert the data into signal values and send them to and from an external operation panel.

〔Example〕

Hereinafter, two embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, the input/output lines of the sequencer 1 are divided into data transfer lines 7 (4 lines in this embodiment) and count value transfer lines 8 (3 lines in this embodiment).

Suppose that the four data transfer lines 7 are I, n, I[[
, IV, and the third line of count value transfer line 8 is displayed as 1.2.4.

Here, count value transfer line 8 is set to 1, 2.4 because of the combination of line 1 and line 2, line 3 (1+
2) is formed.

Signals are sent from data transfer line 7 and count value transfer line 8, respectively, and engage transducer 9. Note that the input/output signals may be serially converted and serially transferred.

The converter 9 (which may be a serial-to-parallel converter) receives the four signals from the data transfer line 7 (1°n, Ill
.
6 signals). In other words, for one signal on the count value transfer line 8, the I signal on the data transfer line 7
, II, [[I, IV signals are combined to form a total of four signals.

At the same time, the 2 signals on count value transfer line 8, the 1+2 signal,
I, n, of data transfer line 7 for 4 signals, respectively.
The t[I, iv times signals are combined to form a total of four signals.

As described above, the desired 16 signals can be sent/input using only seven lines (four data transfer lines and three count value transfer lines) of the sequencer 1. Of course, the count value transfer line 8 is 1+4=5.4+2=6.1+
Since the combination 2+4=7 is unused, 3 more
It is possible to send and output x4=12 input/output data signals. In this embodiment, seven lines are used as described above, but even if 40 pieces of data (10 digit signals) are to be sent/input, the sequencer 1 will have 4 lines as data transfer lines and 4 lines as count value transfer lines ( 1, 2,
4, 8) in total (8 lines allow 15×4=60 data).

Actually, in addition to the seven lines mentioned above, operating lines other than data signals are required within the sequencer 1.

In any case, compared to the prior art, the capacitance is extremely small and can be formed at low cost.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a large amount of data can be sent to and from an external operation panel using a small-capacity sequencer, and the wiring between the sequencer and the external operation panel can be simplified and space taken up can be prevented. The effect will be increased.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a data transfer structure of a conventional sequencer. 1...Sequencer, 2...External operation panel, 3...
- Output line, 4... Input line, 5 - Output side signal, 6... Input side signal, 7... Data transfer line, 8
...Count value transfer line. 9...Converter.

Claims (1)

[Claims] The input/output lines of the sequencer are divided into multiple data transfer lines and count value transfer lines, and the signal values of the transferred data transfer lines and count value transfer lines are combined and converted into a large number of desired input/output signals. A data transfer method for a sequencer that transfers a large amount of data using a small input/output line, which is formed to send in and out of an external operation panel.