JP2632279B2 - Device for collecting process data - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting process data with respect to the position of a steel sheet for associating process data acquired during operation with the length direction of a coil steel sheet.

[0002]

2. Description of the Related Art For example, the manufacturing process of a coil steel plate is as follows.
It consists of welding process → cleaning process → annealing process → plating process → alloying process → chemical treatment process such as rust prevention → verification process → shearing process. Welding connects the coils for continuous processing, and cleaning cleans the welded coil steel plate. In addition, the chemical treatment is for performing a strengthening treatment, and the inspection is for detecting a flaw or the like by a human operator, and the shearing is for cutting to a required length.

[0003] Incidentally, it is important to grasp what kind of processing (working) is performed at which position on the steel sheet in terms of process management and product management. Therefore, various data in each process are determined using a process computer at predetermined time intervals (for example, at 10 second intervals) starting from the welding point.
From the electrical measurement device (via the process input / output device) and the instrumentation control device (via the PI / O data link), calculate the average value based on this data, and A method is used in which one average value of each process data is associated with a product coil.

According to such a method, for example, when 300 data are obtained for one product and data collection is performed at intervals of 10 seconds, data development on the coil is performed at intervals of 30 meters. The shorter the data collection interval, the more accurate the operation data can be positioned on the coil.However, the frequency of using a process computer for data collection increases, resulting in overloading and impeding process control. Therefore, at present, the interval is about 10 seconds.

[0005]

However, in the prior art described above, the PI / O data link system is used, but the communication means is performed by a digital output signal and a digital input signal of the PI / O. Therefore, the transmission speed per data point is at least about 20 mS,
Extremely slow. Further, in the conventional process computer device, since the process control process and the data collection process are simultaneously executed by one CPU, there is a fear that the original process control process may be hindered.
I had to control the computer load by setting it to about seconds.

[0006] In order to collect a large amount of process data at high speed without obstructing the process control process, it is necessary to perform data collection at a constant time period. However, if a large amount of process data is transmitted at one time by the PI / O data link, a huge memory capacity (for example, 40 megabytes) is required to store the data.

For the reasons described above, for example, if process data is collected at a pitch of 1 m (0.3 seconds) in product management units, it is difficult to collect data for a large amount of data and a request for high-speed processing.

An object of the present invention is to provide a process data collecting apparatus capable of collecting a large amount of process data at high speed.

[0009]

To achieve the above object, the present invention provides a process computer having a first CPU for process control and a second CPU for data collection, and a change characteristic of the process. A plurality of data memories for classifying and collecting data according to characteristics of the sensors and the first CP for an electric control device, an instrumentation control device, and the like;
U, and stores actual values from the electric control device and the instrumentation control device into the second CP.
A network memory for temporarily storing data when transferring to U is provided.

[0010]

According to the above means, dedicated CPUs are provided for each of process control and data collection, and a plurality of memories such as an ultra-high-speed data memory, a high-speed data memory, a medium-speed data memory, and a low-speed data memory are provided. The data is divided and collected according to the change characteristics of the process and the characteristics of the sensor, and the connection between the electric control device or the measurement control device and the process computer is performed via a network memory. Thereby, data collection can be performed at high speed without imposing a load on the computer.

[0011]

FIG. 1 is a block diagram showing one embodiment of a process data collecting apparatus according to the present invention.

The process computer 1 includes a CPU 2 (first CPU) in charge of process control and a CPU 3 (second CPU) in charge of data collection, and further includes a keyboard, a storage device, a printer, and a display (not shown). Is connected. The process computer 1 is connected to an ultra-high-speed data memory 4, a high-speed data memory 5, a medium-speed data memory 6, and a low-speed data memory 7, as well as a network memory 8. Further, an electrical control device 9 and an instrumentation control device 10 are connected to the network memory 8.

The data memory is divided into four sections and collected in order to respond to the change characteristics of the process and the characteristics of the sensor. For example, as shown in FIG. 2, the cycle and the data contents correspond to each other. For example, if data collection is performed at a period of 0.3 seconds, data linking of a steel plate for each meter becomes possible.
In addition, the set value and the control calculation value are collected and compounded in a 30-second cycle. Then, as the cycle becomes shorter, the number of data is reduced (500 points in the present invention), so that the computer load is reduced.

The network memory 8 has a CPU
An area for storing the set values transmitted from the control unit 2 and an area for storing the actual values measured by the electric control device 9 and the instrumentation control device 10 are provided so that data can be collected smoothly. The actual values (data) transferred from the electric control device 9 and the instrumentation control device 10 to the network memory 8 are taken into the process computer 1 by the CPU 3. Note that a LAN (local area network) is used to connect the process computer 1 to the electric control device 9 and the instrumentation control device 10.

FIG. 3 shows the electric control device 9 and the instrumentation control device 1.
0 is a flowchart showing processing in the process computer 1, and FIG. 4 is a flowchart showing processing in the process computer 1. Note that S in the figure means a step.

First, FIG. 3 will be described. When a fluctuation event occurs in the process (S301), the actual value (measured value) is transferred to the network memory 8, and the actual value is stored in the network memory 8. FIG. 4 shows only the ultra-high-speed data collection process, but other high-speed data,
Each of the medium speed data and the low speed data has exactly the same flow configuration. Therefore, only the collection of ultra-high-speed data will be described here.

At the time when the collection timing (0.3 second cycle) of the ultra-high-speed data comes (S401), the ultra-high-speed data is read from the network memory 8 by the CPU 3 of the process computer 1 (S402), and the current time and the current P
Extract LG (pulse generator) count value (S
403). Next, the CPU 3 stores the ultra-high-speed data in the ultra-high-speed data memory 4 (S404).

It has been confirmed that, by the above-described control, for example, the computer failure can be reduced by 50% and the storage capacity can be reduced by 85%.

[0019]

As described above, according to the present invention, a process computer having a first CPU for process control and a second CPU for data collection, and a process computer having a process change characteristic and a sensor characteristic are provided. A plurality of data memories for dividing and collecting data, and setting information from the first CPU for an electric control device, an instrumentation control device, and the like, and storing the setting information from the electric control device, the instrumentation control device, and the like. Since a network memory for temporarily storing the actual value when transferring the actual value to the second CPU is provided, data collection can be performed at high speed without imposing a load on the computer.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a process data collecting apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a relationship between a time cycle, data content, and data division according to a change in each processing facility.

FIG. 3 is a flowchart illustrating processing in the electric control device and the instrumentation control device.

FIG. 4 is a flowchart showing a process in a process computer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Process computer 2 CPU 3 CPU 4 Ultra-high-speed data memory 5 High-speed data memory 6 Medium-speed data memory 7 Low-speed data memory 8 Network memory 9 Electric control device 10 Instrumentation control device

Claims (1)

(57) [Claims] 1. A process computer having a first CPU for process control and a second CPU for data collection, and a plurality of data for classifying and collecting data according to process change characteristics and sensor characteristics. The memory stores setting information from the first CPU for the electric control device and the instrumentation control device, and transfers actual values from the electric control device and the instrumentation control device to the second CPU. And a network memory for temporarily storing the process data.