JPH0787617B2 - Rearrangement method of analog input data - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A sampling buffer for storing measurement data digitized by a process adapter in a predetermined order in a processing device for converting measurement data into a digital signal by a process adapter and receiving the signal. A control table for designating a change in the storage order of the measurement data stored in the buffer, and a channel control means for changing the order according to the instruction of the control table and storing it in the buffer are provided.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rearrangement method of analog input data in a channel control mode when an analog signal is input to a digital processor via a process adapter.

[Conventional technology]

FIG. 3A is a diagram showing an example of a conventional analog signal input method.

FIG. 3B is an explanatory diagram of a conventional analog signal input method.

In the figure, 1 is a processor, 10 is a processor, 11 is a memory, 2
Is a process adapter, 20 is a multiplexer, 21 is A-
D converter, 3 _{1 to} 3 _n are measuring instruments, 16 is a channel section, 17
_{1 to} 17 _n are application tasks, and 18 ₁ to 18 _n are sampling subroutines. The same symbols represent the same objects throughout the drawings.

A large number of measuring instruments 3 _{1 to} 3 _n are connected to the processing device 1 via the process adapter 2.

The measurement data collected by the measuring instruments 3 _{1 to} 3 _n are sequentially selected by the multiplexer 20 in the process adapter 2 and then converted into a digital amount by the AD converter 21, and then the processing device 1 Sent to.

When the processing device 1 collects the measurement data via the process adapter 2, the measurement data is collected in the channel control mode in order to reduce the load on the processor 10 of the processing device 1.

This channel control mode is direct memory access
In a process similar to DMA, the direct memory access circuit provided in the channel unit 16 accesses the process adapter 2 without involving the processor 10, and the obtained measurement data is DMA-transferred and stored in the memory 11. .

When actually operating such a measuring system, the processor 10 operates according to the instruction of the application task 17 ₁ . That is, the sampling subroutine 18 _first application task 17 ₁ operates on channel control mode (by driving the channel section 16) to access the process adapter 2, the process for adapter 2 multiplexer 20
To operate, collect the measurement data of each measuring device 3 _{1 to} 3 _n ,
After being converted into a digital amount by the A / D converter 21, it is transferred to the memory 11.

At this time, the multiplexer 20 collects the measurement data of each of the measuring instruments 3 _{1 to} 3 _{n in} the order as shown in FIG. 3B, the first measuring instrument 3 ₁ and the second measuring instrument 3 ₂ , The third is a measuring instrument
₃ 3, ··· n th is usually take the order of the measuring device 3 _n.

[Problems to be solved by the invention]

However, in order to actually operate such a measuring system, various application tasks 17 _{1 to} 17 _n and therefore various sampling subroutines 18 ₁ to 18 _n are created.
In this case, although the measuring instruments used are almost the same, a new application task, in order to sample the measuring instrument data in a different order when connected to the input terminal of the multiplexer 20 of the process adapter 2 in a different order, Therefore, there is a problem that it is necessary to create and prepare a sampling subroutine, which is troublesome in operating the measurement system.

The object of the present invention is to input speed when the order of the measuring instruments 3 _{1 to} 3 _n connected to the input terminal of the provisional multiplexer 20 is changed,
That is, it is to provide a method capable of coping without changing the sampling rate.

[Means for solving problems]

As shown in the principle diagram of FIG. 1, the above-mentioned problem is the processing device 1 which receives the measurement data converted into the digital signal by the process adapter 2, and the digital data which the process adapter 2 outputs in a predetermined order. A sampling buffer 15 for sequentially storing the digitized measurement data, a control table 12 for designating a change in the storage order of the measurement data stored in the sampling buffer 15, a buffer 13 for storing the measurement data, and a channel control means 14 are provided. Will be solved.

[Action]

According to the present invention, when the processing device 1 receives the measurement data from the process adapter 2, the channel control means 14 accesses the process adapter 2 in the channel control mode, and the process adapter 2 is digitalized in a predetermined order. The measurement data is stored in the sampling buffer 15.
Next, the storage order of the measurement data stored in the sampling buffer 15 is changed according to the instruction of the control table 12 and stored in the buffer 13, so that the data sampling is made uniform.

〔Example〕

FIG. 2 (a) is a diagram showing an embodiment of a rearrangement system for analog input data according to the present invention.

FIG. 2B is an explanatory diagram of the control table.

In the figure, 12 is a control table, 13 is a buffer, 14 is a channel control means, and 15 is a sampling buffer.

In the present invention, the processing device 1 is provided with a control table 12, a buffer 13, a channel control means 14, and a sampling buffer 15.

The channel control means 14 is in the channel control mode, that is, it drives the channel section 16 to access the process adapter 2 and drives the multiplexer 20 to drive the multiplexer 20 as shown in FIG.
As shown in one th measuring device 3 _1, the second measuring device 3 _2, the third measuring instrument 3 _3, · · · n-th selects the measured data in the order of the measuring instrument 3 _n, A- This is a task of converting the data into a digital amount by the D converter 21, storing them sequentially in the sampling buffer 15, then changing the storage order of the measurement data according to the instruction of the control table 12, and storing it in the buffer 13.

As shown in FIG. 2B, the control table 12 is a table that specifies the storage order when the application task 17 ₁ stores the measurement data input from the process adapter 2 in the memory 11, and the storage address of the buffer. The data and the storage address data of the sampling buffer 15 are stored as a pair.

In the present invention, application tasks 17 ₁ to the control table 12, and sets the order in which to store the measurement data in the memory 11.

When the application task 17 ₁ collects the measurement data of the measuring instruments 3 _{1 to} 3 _n , it first activates the channel control means 14.

As described above, the channel control means 14 accesses the process adapter 2 in the channel control mode, drives the multiplexer 20 to select the measurement data in the order shown in FIG. After being converted into a digital amount, it is sequentially stored in the sampling buffer 15.

Next, the channel control means 14 sequentially reads the control table 12 from the head and transfers the address data indicated by the address data of the sampling buffer 15 to the address indicated by the address data of the buffer, thereby changing the order of the measurement data and changing the order of the buffer 13. To store.

Next, the measured data stored in buffer 13 is stored in memory.
Transfer to 11.

The arrangement of the measurement data thus transferred to the memory 11 is in the order desired by the application task 17 ₁ .

〔The invention's effect〕

As described in detail above, according to the present invention, if the channels to be sampled are given names or numbers, it is possible to perform processing with the same application task even for different measurement systems, which saves time and effort for program creation. There is a great effect that it can be omitted.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention. FIG. 2 (a) is a diagram showing an embodiment of a rearrangement system for analog input data according to the present invention. FIG. 2B is an explanatory diagram of the control table. FIG. 3A is a diagram showing an example of a conventional analog signal input method. FIG. 3B is an explanatory diagram of a conventional analog signal input method. In the figure, 1 is a processing device, 2 is a process adapter, and 3 _{1 to} 3 _n
Is a measuring instrument, 10 is a processor, 11 is a memory, 12 is a control table, 13 is a buffer, 14 is a channel control task,
15 is a sampling buffer, 16 is a channel section, 17 ₁ to 1
7 _n are application tasks, 18 ₁ to 18 _n are sampling subroutines, 20 is a multiplexer, 21 is A-
It is a D converter.

Claims (1)

[Claims] 1. A processing device (1) for converting measurement data into a digital signal by a process adapter (2) and receiving the digital signal.
A sampling buffer (15) for sequentially storing the digitized measurement data output by the process adapter (2) in a predetermined order, and the measurement data stored in the sampling buffer (15). Control table (1 that specifies storage order change)
2), a buffer (13) for storing the measurement data, and access to the process adapter (2) in the channel control mode, and the process adapter (2) samples the measurement data digitized in a predetermined order. Channel control means for storing in the buffer (15), changing the storage order of the measurement data stored in the sampling buffer (15) according to the instruction of the control table (12), and storing in the buffer (13) An analog input data rearrangement method characterized in that (14) is provided.