JPS60183521A - Backup method of recording part of data logger device - Google Patents

Abstract

PURPOSE:To prevent absence of a record by storing an absence decision output for a record return signal and data in a specific period data storage part with a specific period specification input signal in case of printer abnormality, and printing them out with a printer normalcy signal and a data reproduction signal. CONSTITUTION:A specific period data storage control part 19 decides on the condition between the return signal absence decision output from a normalcy/ absence decision output part 23 and the specific period specification input signal 17 through a printer return signal read part 22 unless a record return signal arrives from a printer 13. Further, a printer record output signal is converted into a printer memory output by a printer memory output part 24, which is stored temporarily in the specific period data storage part 16. When the printer becomes normal, the normalcy signal from the output part 23 and data reproduction signal 15 are discriminated by a control part 19, the contents of the storage part 16 are read out of the printer memory output read part 25 and outputted to the printer 13 from a printer record signal output part 21 through a printer interface 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a backup method for a recording device equipped with a printer.

(Constitution of Conventional Example and its Problems) Conventionally, in data logger devices that measure and record power word values, it has been common practice to record the counted values performed at regular time intervals using a printer. Due to their nature, printers are installed for the purpose of recording important records, and it is a serious problem if the recorded contents are lost due to printer malfunction.However, conventionally, the method of installing two printers was This is not economical, and as countermeasures to this problem, methods have been adopted in which a printer abnormality alarm is issued or the data is temporarily transferred to an auxiliary printer used for other purposes.

FIG. 1 is a block diagram showing the configuration of a conventional data logger device, where ■ is a central processing control unit, 2 is a main printer interface, 3 is a main printer, 4 is an auxiliary printer interface, 5 is an auxiliary printer, and 6 is a reply signal. 7 is a recording output switching section, 8 is a printer abnormality alarm section, a is a main printer input, and b is an auxiliary printer input.

This device has the function of recording measured values recorded at regular intervals on the main printer, and recording irregularly occurring contents such as power outage records, equipment operation, and failures on an auxiliary printer as a miscellaneous note. .

The main printer's manual power a and the auxiliary printer's manual power are input to the central processing control unit 1, and processes such as counting, calculation, conversion, etc. are performed, and based on the program of the central processing and control unit 1, the main printer's manual power The input is divided into an input a1 recorded on the printer 3 and an input a2 recorded on the auxiliary printer 5.

Then, the input a recorded on the main printer 3 is recorded on the main printer 3 via the main printer interface 2,
The input a recorded on the auxiliary printer 5 and the auxiliary printer input A are respectively given to the recording/output cutting/weighing section 7 and input to the auxiliary printer 5 via the auxiliary printer interface 4.

Here, the recording output switching unit 7 outputs 3t! to the auxiliary printer 5! 9
The input to be performed is selected as input a2 or input, and the selection is made depending on whether or not a recording reply signal is output from the main printer. The presence or absence of the recording reply signal from the main printer 3 is detected by the reply signal detection unit 6, and the detection output is compared with the input signal to the main printer 3 in the central processing control unit 1 to determine whether or not the recording reply signal has returned. The judgment signal C or +2 is given to the recording output switching section 7 as a switching control signal.

Here, in the case of the judgment signal c1 in which a recording reply signal is output from the main printer 3, the recording output switching unit 7 performs recording on the auxiliary printer 5 by inputting the auxiliary printer, and in the case of the judgment signal C, the main printer performs recording manually. Recording is performed using input a2, which is different from normal.

In this way, according to the conventional method, the data of the main printer is backed up by the auxiliary printer, but this method cannot be applied to data loggers that do not have an auxiliary printer, or even if the data logger is equipped with an auxiliary printer, the data of the main printer is backed up by the auxiliary printer. Since the auxiliary printer and the auxiliary printer are generally of different models, there is a drawback that switching the output signal of the main printer to the auxiliary printer requires signal conversion, which is troublesome.

(Objective of the Invention) The present invention is intended to eliminate the above-mentioned drawbacks, and provides a method for backing up the recording section of a data logger device, which stores data by providing a storage section that waits for data only during a specific period when a printer abnormality occurs. (Structure of the Invention) The present invention provides a data logger device that is equipped with a central processing unit, a printer, and a printer interface. The missing determination output signal and subsequent data are temporarily stored in the data storage section for a specific period using the specific period designation input signal, and the stored data is printed out to the printer using the printer normal signal and data reproduction signal, and the printer records the data. The structure is designed to prevent omissions.

(Description of Embodiment) FIG. 2 is a block diagram of an embodiment showing the configuration of a data logger used in the present invention, in which 11 is a central processing unit, 12 is a printer input, 13 is a printer, 14 is a printer interface, 15 16 is a data reproduction signal, 16 is a specific period data storage section, 17 is a specific period designation input signal, 18 is a printer abnormality alarm section, and 19 is a specific period data storage control section. Here, the input/output sections between the central processing unit 11 and each component include a printer input reading section 20, a printer recording signal output section 21, a printer reply signal reading section 22, a printer normal signal/missing judgment output section 23, and a printer memory. It is composed of an output section 24 and a printer memory output reading section 25.

Next, the operation of this device will be explained. First, when the printer is in normal condition, the measured values recorded at regular intervals are manually recorded by the printer.
2, the data is input to the printer input reading section 20, edited into data necessary for recording, and inputted from the printer recording signal output section 21 to the printer 13 via the printer interface 14 for recording. Next, when the printer 13 becomes abnormal and the recording reply signal does not come from the printer 13, the printer normal signal/missing judgment output unit 23 outputs the reply signal missing judgment via the printer reply signal reading unit 22 and outputs the reply signal missing judgment signal for a specific period of time. Condition determination with the specified input signal 17 is performed by the specific period data storage control section 19, and the printer recording signal output is converted from the printer memory output section 24 into a printer memory output, which is temporarily stored in the specific period data storage section 16. Here, the specific period is defined as the period required for the printer to return to normal, starting from the printer's abnormality, with respect to the calendar included in this apparatus.

Next, when the printer becomes normal, the normal signal from the printer normal signal/missing judgment output section 23 and the data reproduction signal 15 are judged in the specific period data storage control section 19, and as a result, the specified period data storage section 16 is read by the printer memory output reading unit 25, and the data is output from the printer recording signal output unit 21 to the printer 13 via the printer interface 14 and recorded.

(Effects of the Invention) As explained above, according to the present invention, a printer backup method is possible with a simple configuration and reliability is improved, and since only one printer is required, economical effects are also large. It has the advantage of being

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a conventional data logger, and FIG. 2 is a block diagram of an embodiment showing the configuration of the data logger used in the present invention. 11...Central processing unit, 12...Printer input. 13...Printer, 14...Printer interface, 15...Data reproduction signal, 16...Specific period data storage section, 17...Specific period designation input signal, 18.
...Printer abnormality alarm unit, 19...Specific period data storage control unit, 20...Printer long reading unit, 21...
Printer recording signal output unit, 22...Printer reply signal reading unit, 23...Printer normal signal/missing determination output unit, 24...Printer memory output unit, 25...Printer memory output reading unit. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 2

Claims (1)

[Claims] In a data logger device equipped with a central processing unit, a printer, and a printer interface, when the amount of record reply signals from the printer is lost due to printer abnormality, the record reply signal missing determination output signal and subsequent data are output by input signals specifying a specific period. A method for backing up a recording unit of a data logger device, comprising temporarily storing data in a data storage unit for a specific period, and printing out the stored data to a printer using a printer normal signal and a data reproduction signal to prevent missing print records.