JP3138685B2 - Remote monitoring method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring method for transmitting a status change of a plurality of monitoring items to a monitoring station.

[0002]

2. Description of the Related Art An example of a conventional remote monitoring apparatus is disclosed in
No. 7-015000. The remote monitoring system described in this publication includes a hardware timer and a display input relay. The conventional remote monitoring device having such a configuration operates as follows. That is, if any of the contacts change from off-on-off, a hardware timer is set to prolong the brief on event by holding the display input relay until the timer times out.

[0003]

However, in the above-mentioned prior art, since there is only one hardware timer, there is a problem that it is not possible to cope with a change in a plurality of display inputs occurring within a short time. Further, since the function is realized by the hardware configuration, there is a problem that necessity / unnecessity of holding cannot be easily designated.
Further, since the configuration requires the number of relays corresponding to the number of display items, there is a problem that the cost increases according to the number of display items.

The present invention has been made in view of the above-described circumstances, and can reliably process a plurality of display contact inputs generated within a short period of time with a simple configuration, and can easily determine the necessity of holding. It is an object to provide a remote monitoring method that can be specified.

[0005]

According to a first aspect of the present invention, there is provided a remote monitoring method for transmitting a change in the state of a display contact input, the method comprising the steps of: Capturing a change at a predetermined timing; detecting a state change of each of the plurality of display contact inputs based on a current state of the plurality of display contact inputs captured and a state of the plurality of display contact inputs transmitted last time; steps and, possess the steps of predetermined time hold each state change of the plurality of display contact input, and transmitting each change of state of the plurality of display contact input, said plurality of tables of
In the step of holding the state change of each of the indicating contact inputs,
A storage for holding a state change of each of the plurality of display contact inputs.
It is characterized in that a past state change corresponding to the holding time is held .

Further, according to the invention described in claim 2, according to claim 1,
In the remote monitoring method described above, each state of the plurality of display contact inputs is represented by 1 bit, and these are collectively handled as parallel data having a bit number corresponding to the number of the plurality of display contact inputs. I do.

[0007] According to the third aspect of the present invention, the first aspect of the present invention.
In the remote monitoring method described, multiple input
That is, information indicating which state change is to be stored is stored.
When the status change of multiple display contact inputs is constant according to the information
Hold for a while .

[0008]

According to the present invention, in a remote monitoring device for transmitting information of display contact inputs, a state change of a plurality of display contact inputs is maintained for a predetermined time for each input by software, so that a close configuration can be achieved with a simple configuration. It is also possible to reliably process a plurality of display contact inputs that occur in time. In addition, the software processing method is not a method of simply using a software timer for each display contact input, but a plurality of display contact inputs can be simultaneously performed for a predetermined time by a single record pointer and a logical operation process in word units. This makes it possible to hold data, thereby improving the processing speed and reducing the load. Further, since information indicating which state change is to be retained among the plurality of display contact inputs is stored, and according to the information, the state change of the plurality of display contact inputs is retained for a certain period of time. Unnecessary can be easily specified.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. A. Configuration of Embodiment FIG. 1 is a block diagram showing an overall configuration according to an embodiment of the present invention. In the figure, the remote monitoring device includes a display input unit 1, a data processing device 2 operated by program control, a storage device 3 for storing information, and a transmission unit 4 for transmitting data.

The storage device 3 includes a transmission value storage unit 301, a record pointer storage unit 302, and a retention management storage unit 303.
Consists of The retention management storage unit 303 includes records 303-0 to 303-n corresponding to the retention time (maximum possible value of the record pointer storage unit: n). That is, a series of processes described below every one second (holding start processing means 201, holding end processing means 202)
When the display information is held for 5 seconds under the condition that is activated, the holding management storage unit 303 has a six-record configuration. Each time a series of processes (holding start processing means 201, holding end processing means 202) is started, the record pointer storage section 302 stores a value that is cyclically advanced in the range of 0 to 5.

The data processing unit 2 includes a holding start unit 201
And holding ending means 202. Each of these means operates as follows. Holding start means 201
Is activated by a timer interrupt per unit time, and compares the value of the display contact input (current value) input from the display input unit 1 with the value (previous value) stored in the transmission value storage unit 301. Then, the display contact input item (holding start value) changed from off to on is specified and stored in the holding management storage unit 303. The storage is performed on the record stored this time with reference to the record pointer storage unit 302.

Further, the holding start means 201 calculates a new temporary input value based on the value stored in the transmission value storage unit 301 (previous value) and the value input from the display input unit 1 (current value). I do. The holding ending unit 202 compares the result with the next record (final value record) of the holding management storage unit 303, and deletes the input item whose input state does not need to be extended (the holding end). It is stored in 301.

B. Next, the overall operation of the present embodiment will be described in detail with reference to the flowcharts of FIGS. First, the holding start means 2 of the data processing device 2 is activated by a timer interrupt.
01 is activated, and a display contact input value (current value) consisting of 16 bits (1 word) is input from the display input unit 1. This input value is compared with a value (previous value) stored in the transmission value storage unit 301 to calculate a display item (holding start value) that has changed from off-on. The transmission value storage unit 301 is a storage unit of a value composed of 16 bits (1 word) like the display contact input value, and the calculation is performed by a logical operation [(NOT previous value) AND current value] (step A1 in FIG. 2). ).

Next, the off-state obtained in step A1 is obtained.
The display item (holding start value) changed to ON is stored in the holding management storage unit 303. The storage is performed by referring to the record pointer storage unit 302 to identify the record to be stored this time and to store the specified record. Each record in the holding management storage unit has a configuration of 16 bits (1 word), similarly to the display input value (step A2).

Further, a value (hold value) taking into account holding is calculated from the value (previous value) stored in the transmission value storage unit 301 and the value (current value) input from the display input unit. The calculation is performed by a logical operation [previous value OR current value] (step A3).

Finally, based on the value (holding value) calculated in step A3 and the value (holding start value) stored in the holding management storage unit 303, a new transmission value that has been held is stored in the transmission value storage unit 301. Store. The reference to the retention management storage unit 303 refers to the value stored in the record pointer storage unit 302, and a record in which the retention start value is stored before the retention time (when the storage value = m, record m + 1, where m = n , Record 0) is selected. The calculation of the new transmission value that has been held is performed by a logical operation [hold value AND (NOT hold start value)] (step A4).

Thereafter, the value incremented in the record pointer storage unit 302 (m + 1 when the stored value is m, but 0 when m = n) is stored in the record pointer storage unit 302 (step A5). Further, the value stored in the transmission value storage unit 301 is transmitted from the transmission unit 4 (step A6).

Next, a specific example will be described. As shown in FIG. 3, for example, a series of processing (holding start processing means 20)
1. When display information is held for 5 seconds under the condition that the holding end processing means 202 is started every second (the record is 6
Record configuration), the transmission value storage unit 301 stores “011
0001100000000 "is stored in the record pointer storage unit 3
02 has a value of “1” in record 2 of the retention management storage unit.
Is assumed to store the value "0000000100000000".

It is assumed that the holding start unit 201 is started by an interrupt from hardware and inputs an input value (current value) “0100011000000000” from the display input unit 1. A logical operation of this input value (current value) with a value (previous value) stored in the transmission value storage unit 301 [(NOT previous value) A
The display item (holding start value) “0000010000000000” changed from off to on by ND current value] is calculated and stored in the holding management storage unit 303. Since the value stored in the record pointer storage unit 302 is “1”, the storage is performed on the record 1 in the retention management storage unit 303. Further, the holding start means 201 is provided in the transmission value storage unit 30.
Value stored in 1 (previous value) “0110001100000000”
And the value input from the display input unit 1 (current value) "01000110
By the logical operation [previous value OR current value] with "00000000", a value (temporary input value) "011001110000 considering off-on holding"
0000 "is calculated.

The retention ending means 202 determines whether or not each record in the retention management storage unit 303 has a retention time (5 seconds) earlier than the value “1” stored in the record pointer storage unit 302 when the retention is started. Record 2 in which the value (holding start value) is stored is calculated by the formula of [storage value + 1],
Value stored in record (retention start value) "000000010
0000000 ". This value (holding start value) and the value calculated by the holding start means 201 (temporary input value) are" 0110011 ".
By the logical operation [temporary input value AND (NOT holding start value)] with "100000000", the new transmission value "0110011" whose holding has been finished.
000000000 ", and stores it in the transmission value storage unit 301. After that, the value (storage value 1 + 1 = 2) stepped into the record pointer storage unit 302 is stored in the record pointer storage unit 3
02 is stored. Further, the value stored in the transmission value storage unit 301 is transmitted from the transmission unit 4.

A series of processing (holding start processing means 20)
1. By repeatedly activating the holding end processing means 202) every second, 16 pieces of display input information represented by 16 bits are held and transmitted for a certain period (number of times) in each period.

C. Another Embodiment Next, another embodiment of the present invention will be described in detail with reference to the drawings. C-1. Another Embodiment (Part 1) Referring to FIG. 4, in this other embodiment, the storage device 5 is configured as shown in FIG.
In addition to the configuration of the storage device 3 in the embodiment shown in FIG. The holding target storage unit 304 stores information indicating which of the 16 display items requires the holding function. The holding start unit 201 and the holding end unit 202 refer to the holding target storage unit 304 and do not perform a holding process on a display item that is not registered as a target.

C-2. Another Embodiment (Part 2) Next, still another embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the transmission storage unit 301, the storage management storage unit 303, and the storage target storage unit 304 have a structure having an area for a plurality of words. Of the display information can be held.

As described above, according to this embodiment, since the table constituted by the records is operated by the software processing of sequentially referring to the table by the record pointer, 16 display input information can be managed at each timing. Multiple display inputs can be managed simultaneously. This eliminates the need for mounting a hardware timer, a display relay, and the like, and provides an advantage that cost can be reduced. Also,
The software processing does not use the timer for the number of display items, but simultaneously processes 16 items by one record pointer and logical operation, so the software processing load can be reduced.

[0026]

As described above, according to the present invention,
In a remote monitoring device that transmits information on display contact inputs, a state change of a plurality of display contact inputs is held for a fixed period of time for each input by software, so that a simple configuration allows a plurality of contacts generated within a close time. There is an advantage that the display contact input can be reliably processed. Also,
Rather than simply using a software timer for each display contact input, the state of each of the plurality of display contact inputs is represented by one bit, and these are put together to determine the number of bits corresponding to the number of the plurality of display contact inputs. By handling as parallel data, it is possible to process with one record pointer and a logical operation in word units, and it is possible to simultaneously hold a predetermined time for each of multiple display contact inputs, thereby improving the processing speed And the advantage that the load can be reduced. Further, since information indicating which state change is to be retained among the plurality of display contact inputs is stored, and according to the information, the state change of the plurality of display contact inputs is retained for a certain period of time. There is an advantage that unnecessary can be easily specified.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the overall operation of the embodiment.

FIG. 3 is a conceptual diagram for specifically explaining the overall operation of the embodiment.

FIG. 4 is a block diagram showing an overall configuration according to another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 display input unit 2 data processing device 3 storage device 4 transmission unit 201 retention start processing means (retention start means) 202 retention end processing means (retention termination means) 301 transmission value storage unit 302 record pointer storage unit 303 retention management storage unit 303 −0 to 303-n records

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshiyuki Oishi 1-25, Shinurashima-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Inside of Nippon Electric Robot Engineering Co., Ltd. (56) References JP-A-63-290099 (JP, A (58) Fields investigated (Int. Cl. ⁷ , DB name) G08C 15/06 H04Q 9/00

Claims (3)

(57) [Claims] 1. A remote monitoring method for transmitting a state change of a display contact input, the method comprising: capturing a state change of each of a plurality of display contact inputs at a predetermined timing; , Based on the status of the multiple display contact inputs previously transmitted,
Detecting a state change of each of the plurality of display contact inputs; holding each state change of each of the plurality of display contact inputs for a predetermined time; and transmitting each state change of the plurality of display contact inputs. Yes, and it holds the state change of each of the plurality of display contact input scan
In step, each of the plurality of display contact inputs changes state
The state changes in the past corresponding to the holding time
Distant monitoring method characterized by lifting. 2. The state of each of the plurality of display contact inputs is represented by one bit, and these are collectively handled as parallel data having a bit number corresponding to the number of the plurality of display contact inputs. Item 7. The remote monitoring method according to Item 1. 3. A method for storing information indicating which state change is to be held among a plurality of display contact inputs, and according to the information,
2. The remote monitoring method according to claim 1, wherein a state change of a plurality of display contact inputs is held for a predetermined time.