JPS58121442A - Remote process input processor - Google Patents

Abstract

PURPOSE:To minimize an increase in the load rate of a data transmission line by transmitting process input image data and image data on its variation information simultaneously and thus decreasing the load rate of a central computer. CONSTITUTION:On input to an input image memory 4, a process input variation processor 8 compares the contents of a last-image memory 9 with those of an input image memory 4 with regard to a previously specified signal and store variation information on different corresponding contents in a variation information memory 10. After this storage, the contents of the input image memory 4 are inputted to the last-image memory 4, wherein the contents of the input image memory one period before are therefore stored eventually. Then, a data transmitter 6 transmits the contents of the input image memory 4 and those of the variation information memory 10 in a combined state to the central computer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote process input processing apparatus for transmitting images of process input signals to a central computer.

Conventionally, a device shown in FIG. 1 has been used for this purpose. In the figure, % (1) is a process manual processing device, (2) is a remote process manual processing device, and input scanning device (
3), input image memory (4), Theta Hentai # (
5) % data transmission equipment 1m + 6) ', (7)
is the central iri, J! This is a data transmission path between L and Iso.

Process inputs include analog inputs, digital inputs, pulse inputs, etc., which are arranged into digital signals in a predetermined format by a process input device (1). This digital signal is periodically scanned by an input scanning device (3) and stored in an input image memory (4). In that case, if code conversion is required, the data is converted by the data conversion device (5) and then transferred to the input image memory (4).
is stored in

When all the necessary signals are stored in the input image memory (3), the data transmission device (6) operates to send the contents of the input image memory (3) to the central computer through the data transmission path (7). (not shown), the computer can input this data and create an image of the process input on main memory.

Conventional remote process input processing devices are configured as described above, so in order to detect whether the process manpower has changed, (a) the central rise needs to check the currently input data and the corresponding main Either add a processing step that detects for each item whether or not the data on the storage device matches the data stored in the storage device, or It was necessary to install a separate processing device t- that detects whether each item matches the contents of 3) and, if they do not match, transmits that information to the central 61 calculator. .

In the case of the above Hr2(a) term, an image comparison operation is required every time an input image is received in the central computer, and the load factor on the 1 calculation side increases. In addition, in the case of item (2), data transmission is required to transmit change information every time there is a change in process input, and data transmission path (7) is required.
There was a disadvantage that the negative # rate of the system increased, and the load factor of the central S machine side increased due to data reception.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and each time the contents of the input image memory are transmitted, information on changes in manually specified items is added to the contents of the input image memory. By inputting the contents of the human image memory and the information on the above changes, the central input side minimizes the increase in the load factor on the computer side and also reduces the increase in the load factor on the data transmission path. The object of the present invention is to provide a remote processing manual processing device that can minimize the amount of manual processing required.

The present invention will be described in detail below with reference to the drawings.

Is Figure 2 an implementation of this invention? In the block diagram showing Ij,
The same reference numerals as in FIG. 1 indicate the same or equivalent parts, and (8) is a process input change processing device, (9) is a previous image memory, and (10) is a change information memory.

The operation of the device of FIG. 2 is the same as the device of FIG. 1 until the image of the process input signal is stored in the input image memory (4). The previous image memory (9) is the manual image memory (4) one cycle ago, using the method explained in a later section.
The contents of are stored. When the input to the input image memory (4) is completed, the process manual change processing device (8) smoothly calculates the contents of the previous image memory (9) and the contents of the input image memory (4) for the specified signal. They are compared, and if the corresponding contents are different, they are stored in the change information memory (10) as change information. If the contents of the postmortem input image memory (4) after this storage are input to the previous image memory (9), the contents of the input image memo 1 cycle ago (January 4) will be stored in the previous image memory (9). It turns out.

Furthermore, as is clear from the above explanation, the previous image memory (9) only needs to hold the data for the specified signal, but in order to have the flexibility to change this specification at any time, the previous image memory (9) is In the embodiment shown in Figure 2,
It is assumed that data corresponding to all of the input image memory (4) is held.

Next, the data transmission device (6) input image memory (4
) and the change information memory (t-M combined with the contents of 1) are transmitted to the central US machine.

Figure 3 is a diagram showing the human power image memory and change information memory in Figure 2, and (40) is a diagram showing the human power image memory (40).
4) The content 't-1 (100) is change information memo IJ (
10). All data is divided into groups of 16 bits, group No. 1. No. 2
．． It is organized as follows. Change information memo! j
(101) of (100) stores t which indicates whether or not the logic of the bit has changed for the specified key, and (102) stores group information t in which the changed bit exists.

Change information indicates that there has been a change (for example, expressed as a logic "1")
It can be expressed by a 1-bit signal that indicates whether the change has occurred or there has been no change (for example, represented by logic "0"), and the unit of this change information will be referred to as an event. For example, the state of a switch is on (represented by a logical ``1'') or off (represented by a logical ``1'').
rOJ → “1” in the state signal
” is also an event, and “1” → “0” is also an event, but if you specify event “0” - “1” or event rl
Whether to specify J-rOJ or both is set in advance in the process input change processing device (8).

As shown in Figure 3, information on 16 events is 1
Backed up by the group. Also, each event group (1
The logic of the group information, 1, is determined depending on whether at least one of the 16 events in a group of 6 events has a logical ``1'', or whether all 16 events are ``0'', and this group information is packed with 16 information. They are stored in one group in the storage area shown in FIG. 3 (102).

In the example shown in FIG. 3, the contents of the input image memory C40
) f) Group NO, 1 (7) No. 0 hit + 7) rO
The event of J-rlJ is changed to the contents of the information memory (1
The event number of (101”) in 00) is 1, and the 9th bit of group N001 in the same < (40) is “0”.
→The event of "1" is the event No. of (101), and the same (No, rlJ of the 9th bit of 1) → The event of "0" is the event No. of (101), F (No,
16).

At the center total X iso where the information shown in Figure 3 has been input, first (1
Based on the information in the column 02), the presence or absence of an event is determined for each event group, and it is determined that there is an event.

Since it is only necessary to determine which event in that group has occurred for a specified group, it is possible to quickly determine what event has occurred.
This can significantly reduce the load on the central computer.

It is known that the increase in the load factor of a data transmission path due to an increase in the length of data transmitted at one time is significantly lower than the increase due to an increase in transmission conflicts. When using the device It shown in FIG. 2, there is no increase in transmission frequency compared to when using the device shown in FIG. 1, and the portion shown in FIG. 3 (100) corresponds to an increase in data length. It is easy to make it sufficiently short. The load factor of the central processing unit on the IT computer side for data transmission is usually not related to the data length to be transmitted, but is determined by the frequency of transmission, so according to the device of this invention, the frequency of transmission does not increase. ,Therefore, there is no upward trend in the load factor of the central processing unit.

Further, according to the present invention, the contents of the input image memory and the contents of the change information memory are transmitted simultaneously, thereby guaranteeing data simultaneity.

#! Figure 4 is a block diagram showing an example of the system configuration according to the present invention, in which a central computer (11) has a plurality of remote process input processing devices (2) connected to respective data transmission paths (7).
) indicates a friend case. Figure m5 is a block diagram showing another example of the system configuration in this invention, which includes a central ti calculator (11) and a plurality of remote process input processing devices (
2) and is connected by a loop-shaped data way device (Li wire).

As described above, according to the present invention, since the image data of the change information is transmitted at the same time as the process input image data, the central computer is This has the effect of reducing the negative # ratio and minimizing the increase in the load factor of the data transmission path.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional #c[, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing the contents of the image memory and change information memory in FIG. 2. Fourth
The figure is a block diagram showing an example of the system configuration in this invention, and FIG. 5 is a block diagram showing an example of the system configuration in this invention. (1)...Process manual processing device, (2)...Remote process-human processing device, (3)...Input scanning device, (4)...Input image memory, (6)...・
Data transmission line fit, +71...Data transmission line, (8
)...Process input change processing device, (9)...Previous image memory, (10)...Change information memo! J, (
11)...Central computer. In each figure, the same reference numerals indicate the same, - or equivalent parts. Agent Nobu Tameno - Figure 1, 2rI! J

Claims (1)

[Claims] A remote process that periodically inputs a process input signal, stores the input as a digital signal in a predetermined format in an input image memory, and periodically transmits the 100 million contents to a central computer. In the input processing device, a previous image memory that stores signals input to the input image memory in the previous cycle for at least a predetermined signal among the signals stored in the input image memory; A process of comparing the contents of the previous image memory and the corresponding contents of the input image memory for the specified signal after a new input is made, and inputting change information indicated by the difference into the change information memory. an input change processing device; means for updating the contents of the previous image memory with the contents of the input image memory after inputting to the change information memory; the contents of the input image memory and the contents of the change information memory; and means for periodically transmitting the information to the central computer.