JPS58103001A - Process controller - Google Patents

Abstract

PURPOSE:To improve the reliability of the device, by providing data lines for plural input/output parts in 1:1 and monopolizing one data line in each input/ output part to prevent faults of input/output parts from having influence upon one another. CONSTITUTION:Plural process input/output parts 101 and a controlling part 102 are connected by data lines 201 which are provided for input/output parts 101 in 1:1 and constitute a bus line. Data selection lines 202 constituting a bus line are provided between the controlling part 102 and respective input/output parts 101 to transmit and receive various kinds of data between input/output parts 101 and the controlling part 102. One of plural data lines 201 is used only by each input/output part 101, and faults such as short-circuit of the bus driver or the bus receiver of one input/output part 101 are prevented from having influence upon other input/output parts 101, and thus, the reliability of the process controller is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION This defense relates to gross control equipment, and is particularly intended to provide a reliable and reliable gross control equipment.

FIG. 1 shows the structure of a general control system. In the figure, 101 is a plurality of process input/output units;
2 indicates fhi+H capital. The IMI of the process input/output section 101 is connected to the IMI of the process input/output section 101 by the pass line 103.
to the controller 102 via the controller Tam1 lO
2 is obtained from the pass line 103 and transmitted to each process input/output line 104.

In some cases, the mI section 102 has a gross control function, and in other cases, it is connected to a higher-level equipment section via a communication means and simply performs the transmission of gross input/output data.

FIG. 2 shows a specific structure of the conventional pass line 103. In FIG. 2, parts corresponding to those in FIG. 1 are designated by the same reference numerals. In the figure, 201 is data 7 (n), 202 is r-
203 is a card selection line, 204r and J are control lines. These r-data lines 201 and data selection lines 20
2. The card selection line 203 and the control line 204 form the pass line 103 shown in FIG. 1. 205 is a path driver, 206fd is a bus receiver, and 207 is a terminating resistor.

In this path structure, the control unit 102 card selection selects one of the process input/output units 101 via the selection line 203, and the data selection line 2
Which data in Zoroses input/output unit 101 is determined by 02? Specify which data should be read or sent to the input/output unit 101, and perform the operation 1r of receiving/receiving the specified data to the selected human output 5101 via the data line 201. . At this time, control line 204 provides timing for data acquisition.

Here, if it is placed on the path line 103 in FIG. 2, when the eight input/output units 101 are connected, the data line
01, the data selection line 202 and the card selection line 203 are 4 lines, 4 lines, 4 lines, as shown in FIG.
The line size will be 8. Here, the data scale is determined by the line scale. In the example of FIG. 3, the line size is 4 bits x 4 bits, so the data size is 256 pieces.

Data line 201 and data selection line 202
The number 0 is the same data as in Figure 3, and when it is 41-,
It can be sailed by changing it as shown in Figures 4 and 5.

For example, a number of pass drivers 205 and one pass receiver 206 are connected to each of the lines constituting each pass line 201, 202, and 203 as shown in Figure 6, or as shown in Figure 7. A number of bus receivers 206 and one path driver 205 are used. This usage is the common usage of pass lines.

Here, if a short-circuit failure occurs in any one of the path drivers 205 shown in FIG. 6, the use of that line becomes impossible. Further, regarding the short-circuit failure of the bus receiver 206 shown in FIG. 7, there is also a same thing.

In this way, in the conventional path line, a plurality of path drivers 205 and bus receivers 21J6 are connected to the point where data is transmitted using the 1st FCal 12 column code and the line which transmits the parallel 1j code to the 2nd line. The reliability of the pass line is severely compromised in that the Lahas driver 205 and the bus receiver 206 can suffer from short circuit failures.

In other words, the data handled by the one-man output section is 1-1°1-2.・
...1-32, m data in the second person output section is 2-1.2
-2. ...2-32, and the data handled by the 8th person output section are 8-1.8-2. ...When it is 8-32,
For example, if these data are transmitted on the data bus 201 composed of eight lines 201-1 to 201-8 as shown in Figure 8, for example, the line 201-6
When the data becomes unusable, the data 1-6, 1-14.1- sent on the line 201-6 as indicated by the diagonal i in FIG.
22゜1-30.2-6.2-14.2-22.2-3
0...8-30 are lost, and all input/output sections become impossible to manufacture due to the loss of this data. However, line 201-6 has the disadvantage that 14 parts are discovered because all of the first to eighth output parts are commonly connected.

The purpose of this invention is to provide a gross processor with a highly reliable path structure, so that even if one line (5) among the path lines becomes unusable, all input/output sections do not stop operating. lies in providing controlled skin care.

With this invention, one data line is provided for ill number of input/output parts.
They are arranged in pairs, and each input/output section exclusively uses one data line, so that it is not affected by failures in other input/output sections.

An embodiment of the present invention will be described in detail below using FIG. 9.

In this invention, the data lines 201 are provided in one-to-one correspondence with the process input/output sections 101, as shown in FIG.

The example in FIG. 9 shows a case where eight input/output sections 101 are connected to the control section 102. Therefore data line 20
1 is #/ by eight lines 201-1 to 201-8.
4 can be made. Each data line 201-1~2
To receive data of 32 sleeves between each input/output unit 101 and the control unit 102 using 01-8 as in the case of Fig. 8 (6) Data selection line 202t 5 lines Can be configured. Also, one data line is one
Since the card selection line 203 corresponds to the number of input/output units 101, the data line 201 is not connected to the input/output units 101 of the number of tanks, so the card selection line 203 is not used as in the conventional case.

When according to the configuration of this invention, each data line 201-1
, 201-2, 201-・3, 20.1. -4,...
1st to 8th f process input/output unit 1 carried on 201-8
01 each data 1-1.1-2. ...1-32, 2
-1, 2-2,...2-32...8-I+8-
2...8-32 are arranged as shown in FIG. 1O.

Therefore, according to the present invention, when the line 201-6 of the data line 201 becomes unusable, the data 6-1 and 6 of the sixth input/output unit are transferred as indicated by diagonal lines in FIG. -2, 6-3°, . . . 6-32 is only lost, and the r-values of the other input/output sections are not destroyed. Therefore, by only stopping the operation of the sixth process input/output section, the other process input/output sections can always remain in operation. However, due to the stoppage of the operation of the 6f process input/output unit, the data line 201-6
Since it is possible to immediately determine that a fault has occurred, the location of the fault can be quickly determined, and recovery can be achieved easily.

As explained above, according to the present invention, the data line 2
Since each line of 01 is not shared by the current number of process input/output units 101, a short-circuit failure of one bus driver or bus receiver will only affect the failure of the input/output unit that exclusively uses that path driver or bus receiver. Therefore, it does not give any shadow at all to the unevenness of other Zoroses input/output sections. Therefore, I6 highly reliable Norosesfttll 1
A device R can be obtained. As shown in FIG. 11, according to the present invention, a bus cutter 1101 is installed in the control unit H of the present invention, and by duplicating the control section 102, even greater flexibility can be achieved.

Since the number of path drivers 205 and bus receivers 206 on the data line 201 in the conventional path a-immersion shown in FIG. 2 is much larger than in the device according to the present invention, the failure probability of the path line is low becomes high, making it difficult to reduce the abnormal time ratio. This is the same thing even if the control unit 102 is duplicated;
The effect of duplicating the section 102 is very good.

In this respect, according to the bus structure adopted in the Norocess control device of the present invention, the effect of duplicating the control section 102 is large, and therefore, high reliability can be easily achieved.

However, according to the present invention, it is easy to determine the faulty part, and restoration work can be carried out in a short period of time, and its effects are extremely great in practical use.

[Brief explanation of the drawing]

Figure 1 is a block diagram to explain the overall configuration of a general path control device, and Figure 2 is a connection diagram to explain the 414 structure of a pass line used in a conventional path control device. Figures 3 to 5 are the same data 1j4
Meeting for reforming the pass line that can transmit FIG. 9 is a data layout diagram for explaining the layout of data transmitted through a conventional path line, FIG. 9 is a block diagram showing a simple embodiment of the present invention, and FIG. 10 is a summary of the present invention. Arrangement of data for explaining the operation of the section 1 Figure 11 is a block diagram showing another example of the present invention. 101: Process input/output section, 102:? 1tl11x1
Part, 103: Pass line, 104': f process input/output line, 201: Data line constituting the pass line, 2
02: Gata selection line forming the pass line. % Applicant Kuruma Kusano (10) Age 31 4 Figure';? 5 Figure

Claims (1)

[Claims] In a process control device in which a control section and a gross input section are connected by a pass line, the pass line has at least an r-data line and a data selection line, and the data line connects the plurality of processes. The input and output sections are provided in one-to-one correspondence, and the upper six
A Noroses system senso bride that traces the data on its own data line.