JPH01320471A - Reader for output of readout counter - Google Patents

Abstract

PURPOSE:To accurately read the data of a readout counter by reading the data three times at time intervals longer than the data updating time of the counter and deciding the data as effective when two of the three reading results of the data coincide with each other. CONSTITUTION:A control section 9 issues a reading command to an input interface 4 to read the data of a readout counter 2 at prescribed sampling timing and the interface 4 reads the data signal of the counter three times. Each input data are separately stored in the 1st to 3rd data memories 5a-5c. A comparing section 6 compares the read data stored in the memory sections 5a-5c with each other and, when two or three of the stored data coincide with each other, the data are stored in an effective data memory section 7 as effective data. But, when the data reading command is given from an electronic computer 3 side at timing which is a little earlier than the data updating time of the counter 2, the three data are completely different from each other. In such case, all data are regarded as ineffective and integrated value data are read three times and decides coincidence so as to find effective data.

Description

[Detailed description of the invention] [Objective of the invention l (Industrial application field) This invention relates to processing of input data of electronic computers, etc.
In particular, the present invention relates to a readout counter output reading device for accurately reading integral value data from a readout counter.

(Prior art) For example, integrated values such as electric energy are read into electronic counters and processed as data for power demand control, CRT display, typewriter recording, etc. However, due to computer failure, etc. If the computer function goes down, the electronic computer will stop working and the computer's integrated value file data will be reset.

For this reason, when the function of the electronic meter 871 goes down, it is necessary to read accurate integrated value data when it is restored. The transmitted pulse signal 1 is input to a readout counter 2 at one end, and the input pulse signal 1 is stored in a count file as integrated value data.

The readout counter 2 counts and integrates (the direct data is converted into a binary digital code signal for each digit X+, X2, . . . , Xn and input to the computer 3).

Therefore, the electronic computer 3 reads the binary digital code signal of each digit of the readout counter 2 as integrated value data at any time or at regular intervals according to its own program.

(Problem to be Solved by the Invention) However, in such a conventional readout force/Kunta output reading device, a binary digital code is converted for each digit X+, X2,...Xn of the readout counter 2. When the pulse signal 1 is input and the readout counter 2 updates its own cumulative value data, a digital signal with a value different from the regular cumulative value data is temporarily output. There is.

For example, to explain the case where a certain digit of the readout counter 2 advances from 3 to 4, when the input pulse signal 1 is input as shown in FIG. 5(a),
2 of a certain digit of the lead-out counter 2 as shown in e)
Evolutionary digital code signal (+), (2), (4
).

(8) is updated as follows.

In other words, a certain digit's binary coded digital code signal output (1)
The binary code signal output (2) changes from on to off, and the binary code signal output (4) changes from off to on, but these binary code signal outputs (+) and (2) , (4) will change repeatedly within the data update time TD.

Therefore, the data read into the electronic computer 3 at sampling timings A, B, C, and D of the electronic meter tiXR3 is as follows.

The numerical data of the output value Y of the readout counter 2 at sampling timing A is 3 (-011), and the numerical data of the output value Y at sampling timings C and D is 4 (
= 100), which is a normal value, but the numerical data of the output value Y at sampling timing B within the data update time TD of readout counter 2 is 7 (= 111).
This is incorrect data.

Therefore, if the electronic computer 3 samples the data of the lead-out counter 2 while the data of the lead-out counter 2 is being updated, there is a problem that incorrect data will be input to the electronic computer 3.

The present invention has been made in view of such conventional problems, and the present invention has been made in view of the above-mentioned problems in the prior art. To provide a readout counter output reading device capable of reading normal data from a readout counter even when reading at timing.

[Structure of the Invention] (Means for Solving the Problems) The read door "counter output reading device" of the present invention includes
A readout counter receives a pulse signal, converts it into a binary coded digital code signal, and outputs a pulse integrated fraction, and a readout counter that reads data from this readout counter at a time interval larger than the time required to update the readout counter data. Compare the data reading means that reads three or more times in succession with each data read by this data reading means,
When two or more pieces of matching data are found, the matching data is used as valid input data from the readout counter, and when no matching data is found, all read data is invalidated, and the data reading means and a control means for reading data again from the lead-out counter.

(Function) In the readout counter output reading device of the present invention,
When reading the integrated value data of a lead-out counter, the lead-out counter reads the integrated value data from the lead-out power counter three or more times in succession at a time interval larger than the time required for updating the data.

Then, compare each read data and find 2 matching data.
If more than one matching data is found, the matching data is taken as valid input data from the readout counter, and when no matching data is found, all the read data is invalidated, and the readout counter is input from the data reading means at the same timing. The data is read in again and the same operation is repeated until two or more matching data are found.

This operation makes it possible to always read valid data even if data reading occurs at the timing when the unit value data on the lead-out counter side is updated.

(Example) Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a system configuration diagram of an embodiment of the present invention.
For example, sequentially combine pulse signals 1 from a power supply meter,
The readout counter 2 outputs as a binary digital code signal and the II from this readout counter 2.
It consists of an electronic computer 3 for reading reconnaissance data.

And electronic calculation 1ff3 has lead-out counter 2.
an input interface 4 for data signals from a first data memory section 5a, a second data memory section 5a for sequentially storing input data;
The data memory section 5b, the third data section 5C, the first data memory section 5a, the second data memory section 5b, and the third
A comparison section 6 that compares three pieces of data stored in the data memory section 5C, a valid data memory section 7 that stores valid data obtained by this comparison section 6, and a clock 8.
and a control section 9 that controls the operation of each of the constituent sections 4 to 8 of the computer 3.

The operation of the lead-out counter having the above configuration will be explained based on the flowchart of FIG. 2 and the time chart of FIG. 3.

When the pulse signal 1 is input to the readout counter 2 as shown in FIG. 3(a), the data is updated by 1 in the data update time TD as shown in FIG. 3(b).
N, N+1. N+2 and W4 stem.

Therefore, the control unit 9 on the computer 3 side decides to read the data from the readout counter 2 three times at one sampling timing, as shown in FIG. time, this data reading interval T is the data update time required for readout counter 2.
Make it better.

It is assumed that each data reading time is shorter than the data update time TD.

The operation of the computer 3 reading the integrated value data signal from the readout counter 2 will be explained with reference to the flowchart shown in FIG. A data reading command is given, the data signal from the readout counter 2 is read three times at a reading interval T, and each input data is stored in the first data memory section 5a.

The data is stored in the second data memory section 5b and the third data memory section 5C (steps 81 to 83).

Next, the comparison unit 6 compares the read data stored in each data memory unit 5a to 5C in steps 84) and 2.
It is determined whether there is one or three pieces of matching data (step 85).

Now, if we consider the case where sampling n is performed while the data of the readout counter 2 is being updated as shown in FIG. The data read the second and third times becomes N+1, and the two data match.

In other words, since the three data reading intervals T are longer than the data update time TD of the readout counter 2,
Even if the first data is X, the next second data read will be N+1, and the third data read will also be N+1.
Therefore, N −+−1 can be stored in the valid data memory section 7 as valid data (step 36).
.

In addition, if the sampling timing of the electronic tightening device 3 is completely different from the data update period of the readout counter 2, as in sampling (n+1>), the data read three times will all match and become N+2, and in this case Also, N+2 is stored in the valid data memory section 7 as valid data.

However, if the data read command on the computer 3 side is given at a timing slightly earlier than the data update time on the readout counter 2 side (Fig. 3 (C)
), the data read into the first data memory section 5a is N, the data read into the second data memory section 5b is the value X when the data of the readout counter 2 is updated, and the data read into the second data memory section 5b is the value X when the data of the readout counter 2 is updated. The data read into section 5C becomes new data N + 1 after the update, and the data stored in each data memory section 5a to 5C are all different, but in such a case, all The data is invalidated, a data read command is given again, and the integrated value data of the readout counter 2 is read out again at the time interval Tffl.
The data is read several times in succession to determine if the data matches, and to produce valid data.

In the case of this embodiment, the data signal of the readout counter 2 is read three times in a row at a time interval T that is slightly longer than the data update time TD of the readout counter 2, and valid data is determined by determining whether they match. However, the data may be read four or more times in a row, and there is no particular limit to the number of consecutive reads.

[Effects of the Invention] As described above, according to the present invention, when reading data from the lead-out counter, the data is read three or more times in succession at a time interval that is longer than the time required to update data of the lead-out counter, Since the validity of the data is determined based on whether or not the two pieces of data match, even if the read data does not match, the computer side updates the readout counter data as in the past. There is no fear that erroneous data will be read due to reading, and accurate data can always be read.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram of an embodiment of the present invention, and FIG. 2 is a flowchart 1 to 3 explaining the operation of the above embodiment.
The figure is a time chart explaining the operation of the above embodiment.
The figure is a system configuration diagram of a conventional example, and FIG. 5 is a time chart explaining the operation of the conventional example.

Claims (1)

[Claims] A readout counter that receives a pulse signal, converts it into a binary coded digital code signal, and outputs a pulse integrated value, and a readout counter that reads data from this readout counter at a time interval larger than the time required to update the readout counter data. Compare the data reading means that reads three or more times in succession with each data read by this data reading means,
When two or more pieces of matching data are found, the matching data is used as valid input data from the readout counter, and when no matching data is found, all read data is invalidated, and the data reading means A readout counter output reading device comprising a control means for reading data from the readout counter again.