JPH09230926A - Monitoring controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To investigate a cause in detail when a transmission abnormality is generated between a transmission equipment and a slave by adding a display means displaying a transmission text to be outputted to the slave and a reception text to be transmitted via a smart transmission line with the transmission result. SOLUTION: A smart transmission part 11 transmits a smart transmission text transmitted from a CPU 13 via an internal bus 15 to a slave 1 via a smart transmission line 2. The response to the smart transmission text received from the slave 1 via the smart transmission line 2 is transmitted to the internal bus 15. The judgment as to whether this transmission is normally performed or not is performed based on the transmission text and reception text stored in a text preservation buffer 22. When a transmission abnormality is generated, the transmission, the reception text and the transmission result, etc., stored in the text preservation buffer 22 of a smart transmission equipment 3 are read and are made to be displayed on the display of a computer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control device used for investigating a transmission abnormality between a transmission device and a slave connected via a smart transmission line.

[0002]

2. Description of the Related Art FIG. 8 is a diagram showing the overall configuration of a supervisory controller. As shown in the figure, the state of a plant or the like is monitored, and information (for example, range) of a slave such as a sensor is taken into each of a plurality of slave sensors 1 via a smart transmission line 2, or information is acquired. To the slave is connected to the smart transmission device 3.

These smart transmission devices 3 are connected to a controller 5 via a transmission line 4. A computer 6 for displaying and processing the information stored in the controller 5 is connected to the controller 5.

Further, each controller 5 is connected to the main transmission line 7, and the supervisory control device 8 performs supervisory control. FIG. 9 is a diagram showing an internal configuration of the smart transmission device 3.

As shown in the figure, the smart transmission device 3
Is a smart transmission unit 11, a controller transmission unit 12, C
It has a PU 13 and an error counter 14, which are connected to an internal bus 15.

The smart transmission unit 11 transmits the smart transmission text transmitted from the CPU 13 via the internal bus 15 to the sensor 1 via the smart transmission line 2. In addition, the internal bus 15 sends a response to the smart transmission text transmitted from the sensor 1 via the smart transmission line 2.
To be transmitted.

The controller transmission unit 12 includes a transmission line 4
The read request of the sensor information transmitted from the controller 5 connected to is transmitted to the internal bus 15. Further, the controller transmission unit 12 outputs the determination result of the response of the smart transmission text transmitted from the CPU 13 to the internal bus 15 to the controller 5 via the transmission line 4.

The CPU 13 creates a smart transmission text on the basis of the sensor information read request sent from the controller transmission unit 12 to the internal bus 15, and outputs it to the smart transmission unit 11 via the internal bus 15.

Further, the CPU 13 has a smart transmission section 11
It is determined whether or not the response of the sensor 1 to the smart transmission text transmitted to the internal bus 15 from is a correct response, and the determination result is output to the error counter 14 via the internal bus 15.

Further, the response to the smart transmission text is output to the controller transmission unit 12 via the internal bus 15. The error counter 14 stores the determination result of whether or not the response of the sensor 1 to the smart transmission text made by the CPU 13 is a correct response.

Next, the operation of the smart transmission device configured as described above will be described. When the controller 5 outputs a sensor information read request to the controller transmission unit 12 of the smart transmission device 3 via the transmission line 4,
The controller transmission unit 12 outputs this read request to the internal bus 15.

The CPU 13 creates a smart transmission text based on the read request for the sensor information output to the internal bus 15, and outputs it to the smart transmission unit 11 via the internal bus 15.

Then, the smart transmission unit 11 has the CPU 1
The smart transmission text transmitted from 3 via the internal bus 15 is output to the sensor 1 via the smart transmission line 2.

When a response to the smart transmission text is returned from the sensor 1 to the smart transmission unit 11 via the smart transmission line 2, the smart transmission unit 11 outputs the response to the internal bus 15.

The CPU 13 determines whether or not the response from the sensor 1 output from the smart transmission unit 11 to the internal bus 15 is a correct response, and the determination result is used as the internal bus 15.
It is stored in the error counter 14 via. Also, CPU
Reference numeral 13 outputs a response from the sensor 1 to the controller 5 via the internal bus 15, the controller transmission unit 12, and the transmission line 4.

[0016]

The smart transmission line 2 which connects the smart transmission unit 11 and the sensor 1 as a slave is located at the field end as compared with the transmission line 4, and is easily affected by various noises.

When the smart transmission line 2 is affected by noise, abnormal transmission occurs as a result. Conventional smart transmission equipment is used to investigate the cause of this transmission abnormality.
An error counter 14 is provided inside the smart transmission device 3 to count the number of times of transmission abnormality for each type of transmission abnormality.

The content of the error counter 14 is read by the CPU 13 according to a command from the controller 5 connected to the transmission line 4, and then output from the controller transmission unit 12 to the controller 5 via the transmission line 4. .

Then, the computer 6 connected to the controller 5 displays the contents, and checks what kind of error occurs and how often.

However, as described above, in the method of examining the contents of the error counter 14, the frequency of each occurrence of the error can be examined, but further detailed cause cannot be examined.

For example, even if the counter "no response" is increasing, it is investigated whether the smart transmission device 3 is not transmitting text or whether the smart transmission text is missing due to noise or the like. There was a problem that I could not do it.

The present invention has been made in view of the above circumstances, and provides a monitoring control apparatus capable of investigating the cause of a transmission abnormality in transmission between a transmission device and a slave in detail. The purpose is to provide.

[0023]

Therefore, first, in order to achieve the above object, the invention according to claim 1 transmits a command to a slave represented by a sensor transmitted from a controller via a transmission line to a transmission device. After being converted into a transmission text, the transmission result is output to the slave via the smart transmission line and the transmission result indicating whether the transmission text is normally transmitted is stored in the transmission device. In a supervisory control device displaying a transmission result for investigating a transmission abnormality between the transmission device and the slave, a transmission text output to the slave and a response from the slave corresponding to the transmission text. And a display means for displaying the received text transmitted via the smart transmission line together with the transmission result. Wherein the pressure was.

In the invention according to claim 2, the command transmitted to the slave represented by the sensor from the controller via the transmission line is converted into the transmission text by the transmission device and then transmitted via the smart transmission line. ,
The transmission result indicating whether or not the transmission text is normally transmitted is stored in the transmission device while being output to the slave, and the transmission result stored in the transmission device is checked for abnormal transmission between the transmission device and the slave. In the supervisory control device displayed for investigation, the transmission device is a transmission text transmitted to the slave via the smart transmission line, and a response from the slave corresponding to the transmission text, A flag for deciding whether or not to save the received text transmitted through the smart transmission line, and a transmission text for storing the transmission text if the flag allows the storage of the transmission text. Save means and save received text if the flag allows saving of received text A transmission state determination means for determining whether or not a transmission abnormality has occurred, based on the transmission text stored in the transmission text storage means and the reception text stored in the reception text storage means; When the transmission state determination means determines that a transmission abnormality has occurred, the transmission text determination means includes a setting means for setting that the storage of the transmission text and the reception text is not permitted, and the controller includes the transmission text storage means. And a display means for displaying the transmitted text stored in the received text and the received text stored in the received text storage means together with the transmission result on a display.

According to the third aspect of the present invention, the command transmitted to the slave represented by the sensor from the controller via the transmission line is converted into the transmission text by the transmission device and then transmitted via the smart transmission line. ,
The transmission result indicating whether or not the transmission text is normally transmitted is stored in the transmission device while being output to the slave, and the transmission result stored in the transmission device is checked for abnormal transmission between the transmission device and the slave. In the supervisory control device displayed for investigating, based on the transmission result that is connected to the transmission line and is input from the transmission device through the transmission line, a predetermined value is determined when the controller determines that the transmission is abnormal. Trigger signal output means for outputting a trigger signal based on a control signal output at a timing is added, and the transmission device transmits the transmission text to the slave via the smart transmission line, and the transmission text. A response from the slave corresponding to the received text transmitted via the smart transmission line. A flag for deciding whether or not the transmission text is stored, and a transmission text storage means for storing the transmission text when the flag permits the storage of the transmission text. When the trigger signal is input from the trigger signal output means, the received text storage means for storing the received text, and the setting means for setting that the storage of the transmitted text and the received text is not permitted in the flag And a display means for displaying the transmission text stored in the transmission text storage means and the reception text stored in the reception text storage means on a display together with the transmission result. It is characterized by having.

Next, the operation of the invention according to each of the above claims will be described. According to the first aspect of the present invention, the transmission means outputs the transmission text output to the slave and the reception text which is a response from the slave corresponding to the transmission text and is transmitted via the smart transmission line, as a transmission result. Since the information is also displayed, it is possible to investigate in detail the cause of the transmission abnormality, if any.

According to the second aspect of the present invention, the transmission status judgment means of the transmission device determines that the transmission abnormality is caused based on the transmission text stored in the transmission text storage means and the reception text stored in the reception text storage means. Determine whether it has occurred. Further, when it is determined by the setting means that a transmission abnormality has occurred, the flag is set to the effect that storage of text is not permitted.

Next, the display means displays the transmission text stored in the transmission text storage means until the transmission abnormality occurs, the reception text stored in the reception text storage means, and the transmission result on the display. Therefore, the cause of the abnormality can be investigated in detail.

According to a third aspect of the present invention, the trigger signal output means connected to the transmission line determines when the controller determines that the transmission is abnormal, based on the transmission result input from the transmission device via the transmission line. A trigger signal is output based on the control signal output at the timing.

Then, when the trigger signal is inputted from the trigger signal output means by the setting means, the flag is set not to allow the text storage, and the display means
The transmission text stored in the transmission text storage means, the reception text stored in the reception text storage means, and the transmission result after a predetermined timing from the occurrence of the transmission abnormality are displayed on the display. Can be investigated in more detail.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 is a diagram showing a configuration of a smart transmission device in a supervisory control apparatus according to a first embodiment of the present invention. The same parts as those in FIG. 9 will be described with the same reference numerals.

As shown in the figure, the smart transmission device 3
Is a smart transmission unit 11, a controller transmission unit 12, C
PU 13, error counter 14, transmission save permission flag 2
1. A text storage buffer 22 is provided, which are connected to the internal bus 15.

The smart transmission unit 11 transmits the smart transmission text transmitted from the CPU 13 via the internal bus 15 to the sensor 1 via the smart transmission line 2. Also, the internal bus 15 receives a response to the smart transmission text received from the sensor 1 through the smart transmission line 2.
To be transmitted.

The signal transmission method on the smart transmission line 2 between the smart transmission unit 11 and the sensor 1 is performed by superimposing a digital signal on an analog signal. The controller transmission unit 12 transmits to the internal bus 15 a sensor information read request signal or the like transmitted from the controller 5 connected to the transmission line 4.

Further, the controller transmission unit 12 is a CPU
The determination result of the response of the smart transmission text transmitted from 13 to the internal bus 15 is output to the controller 5 via the transmission line 4.

The CPU 13 creates a smart transmission text based on a sensor information read request signal transmitted from the controller transmission unit 12 to the internal bus 15, and outputs the smart transmission text to the smart transmission unit 11 via the internal bus 15. .

Further, the CPU 13 has the smart transmission section 11
It is determined whether or not the response of the sensor 1 to the smart transmission text transmitted to the internal bus 15 from is a correct response, and the determination result is output to the error counter 14 via the internal bus 15.

The judgment as to whether or not the transmission is normally performed is made based on the transmitted text and the received text stored in the text storage buffer 22. CPU 13
When it is determined that the transmission is not performed normally, the transmission save permission flag 21 is set to the “prohibited” state.

Further, the CPU 13 outputs a response to the smart transmission text to the controller transmission unit 12 via the internal bus 15. Further, when the transmission save permission flag 21 is in the “permitted” state, the CPU 13 displays the text and text size actually transmitted / received in the smart transmission unit 11 and the determination result such as normal, no response, framing error, etc. in the text storage buffer. It stores in 22.

The error counter 14 stores the result of judgment by the CPU 13 as to whether or not the response of the sensor 1 to the smart transmission text is a correct response. The transmission storage permission flag 21 is normally in the “permitted” state, and when the CPU 13 determines that the transmission is not normally performed, the CPU 13 “prohibits”.
Set to state.

As shown in FIG. 2, the text storage buffer 22 is composed of a buffer counter and buffers 1 to n. The buffer counter is buffer 1
This is a counter that indicates in which buffer the information indicating the transmitted text, the transmitted text size, the received text, and the like in the buffer n is stored.

For example, if the buffer counter is "1", the transmitted text, the transmitted text size,
Information indicating the received text or the like is stored, and if the buffer counter is “2”, the buffer 2 stores information indicating the transmitted text, the transmitted text size, the received text, or the like.

The buffer 1 to the buffer n store the transmitted text size, the received text size, the transmission result (normal / no response / framing error), the transmitted text, and the received text, respectively.

Next, the operation of the smart transmission device configured as described above will be described with reference to the flowchart. FIG. 3 is a flowchart for explaining an operation of transmitting a transmission text from the smart transmission device to the sensor.

From the controller via the transmission line 4,
When a sensor information read request signal or the like is output to the controller transmission unit 12 of the smart transmission device 3, the controller transmission unit 12 outputs this read request to the internal bus 15.

The CPU 13 creates a transmission text based on the sensor information read request signal output to the internal bus 15, and the smart transmission unit 1 via the internal bus 15.
Output to 1.

The smart transmission unit 11 selects one of the transmission texts transmitted from the CPU 13 via the internal bus 15.
Send the send text corresponding to the characters (step
1). Next, the CPU 13 causes the transmission save permission flag 2
It is determined whether 1 is in the "permitted" state (step 2), and if it is determined that the "permitted" state is in effect, the CPU 13 sends one character to the sensor 1. The transmitted text and the text size for a minute are stored in the text storage buffer 22 (step 3).

Immediately after the power of the smart transmission device 3 is turned on, the buffer counter of the text storage buffer 22 is set to "1". Therefore, immediately after the power is turned on, the first transmitted text is stored in the buffer 1 corresponding to the value of this buffer counter.

Next, the CPU 13 determines whether or not the transmission texts for all characters have been transmitted (ste.
p4), if it is determined that the transmission text for all characters has not been transmitted, the process returns to step 1.

On the other hand, in the processing of step 4, when it is determined that the transmission texts for all the characters have been transmitted, the transmission processing is ended and the reception processing is started. FIG. 4 is a flowchart for explaining a receiving operation of a text transmitted from the sensor to the smart transmission device.

When the text from the sensor 1 is received by the smart transmission unit 11 via the smart transmission line 2,
The received text is output to the internal bus 15 by the smart transmission unit 11.

When the CPU 13 receives one character of the received text output to the internal bus 15, the CPU 13 determines whether or not the transmission storage permission flag 21 is in the "permitted" state. Re (step12),
When it is determined that the status is “permitted”, C
The PU 13 saves the received data for one character in the text save buffer (step 13).

Next, the CPU 13 determines whether or not the received data for all characters has been received (step 1).
4) If it is determined that the received data for all characters has not been received, the process returns to step 11.

On the other hand, in the processing of step 14, when it is determined that the received data for all characters is received, the receiving processing is ended and the text decoding processing is started. FIG.
3 is a flowchart for explaining the operation of the text decoding process.

The CPU 13 uses the text storage buffer 22.
The transmission result (normal / non-response / framing) is determined based on the information stored in, and when the transmission storage permission flag 21 is in the “permitted” state, the determination result is stored in the text storage buffer 22. Save (step 22).

On the other hand, in the processing of step 21, when it is determined that the transmission storage permission flag 21 is not in the "permitted" state, the processing proceeds to step 23. Next, it is judged whether or not the transmission state is normal (step 23). If not normal, the CPU 13 sets the transmission save permission flag 21 to the "prohibited" state (step 24), and the received text decoding process is performed. finish.

On the other hand, if it is determined in step 23 that the transmission state is normal, the text decoding process is executed and the received text decoding process is ended. Then, the buffer counter is incremented by one to prepare for the second transmission.

Further, the increment operation of the buffer counter of the text storage buffer 22 is performed only when the transmission is normal, and is not performed when the transmission is not normal. Further, after the buffer counter has been counted up to n times, it returns to "1" and counting is performed again.

When a transmission abnormality occurs, the controller 5 connected to the transmission line 4 reads the transmission text, the reception text, the transmission result, etc. stored in the text storage buffer 22 of the smart transmission device 3. Then, it is displayed on the display of the computer 6.

The operator determines the cause of the transmission abnormality based on these pieces of information displayed on the display of the computer 6. Therefore, according to the supervisory control device according to the present embodiment, when a transmission abnormality occurs, the transmission text up to the time when the transmission abnormality occurs is stored in the text storage buffer 22, so that the transmission line 4 By reading the stored text by the connected controller 5, the cause of the abnormality can be investigated. <Second Embodiment> FIG. 6 is a diagram showing a configuration on a transmission line of a supervisory control device according to a second embodiment of the present invention, and FIG. 7 is a block diagram of the second embodiment. It is a figure which shows the structure of the smart transmission apparatus of a monitoring control apparatus. The same parts as those in FIGS. 1 and 8 are designated by the same reference numerals for description.

The difference between the smart transmission device according to the first embodiment and the smart transmission device according to the present embodiment is that the controller 5 controls the storage of the transmitted text and the received text in the text storage buffer 21. To do.

As shown in the figure, in the supervisory control device of this embodiment, a digital output device 31 is connected to the transmission line 4. This digital output device 31
When the controller 5 detects a transmission abnormality based on the transmission result output from the smart transmission device 3, the trigger signal is transmitted to the smart transmission device based on the control signal output to the transmission line 4 at an arbitrary timing. 3 to the trigger input circuit 32.

The output timing of this control signal is
It can be adjusted by the application program of the controller 5. When the trigger signal is input to the trigger input circuit 32 of the smart transmission device 3, the CPU 13 sets the transmission save permission flag 21 to the “prohibited” state, and the information such as the transmitted text and the received text is stored in the text storage buffer 22. To prevent

By adopting such a method, the user can create an arbitrary application program and save the transmitted text and the received text at arbitrary timing.

It should be noted that in the monitoring control devices of the above-described first and second embodiments, the case where the sensor corresponds to the slave has been described, but the slave is not limited to the sensor and, for example, an electromagnetic wave may be used. It may be a flow meter.

Therefore, according to the supervisory control device of this embodiment, after the transmission error is detected by the application program of the controller 5, the period during which the information such as the transmitted text and the received text is stored in the text storage buffer is set. adjust.

Then, the information such as the transmission result, the transmission text, the reception text and the like until a predetermined time passes after the transmission abnormality occurs can be read and displayed by the controller 5 connected to the transmission line 4. So
Furthermore, the cause of the transmission abnormality can be investigated in detail.

[0068]

As described above in detail, according to the present invention,
If a transmission error occurs in the transmission between the transmission device and the slave, the transmission result and the received text can be displayed together, so the cause of the transmission error can be investigated in detail. .

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a smart transmission device in a supervisory control device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a text storage buffer of the smart transmission device according to the first embodiment.

FIG. 3 is a flowchart for explaining a transmission operation of the smart transmission device according to the first embodiment.

FIG. 4 is a flowchart for explaining a receiving operation of the smart transmission device according to the first embodiment.

FIG. 5 is a flowchart for explaining a decoding process of a received text of the smart transmission device according to the first embodiment.

FIG. 6 is a diagram showing a configuration on a transmission line of a supervisory control device according to a second embodiment of the present invention.

FIG. 7 is a diagram showing an internal configuration of a smart transmission device of the supervisory control device according to the second embodiment.

FIG. 8 is a diagram showing an overall configuration of a supervisory control device.

FIG. 9 is a diagram showing an internal configuration of a conventional smart transmission device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sensor, 2 ... Smart transmission line, 3 ... Smart transmission device, 4 ... Transmission line, 5 ... Controller, 6 ... Computer, 7 ... Main transmission line, 8 ... Supervisory control device, 11 ... Smart transmission part, 12 ... Controller Transmission unit, 13 ... CPU, 14 ... Error counter, 15 ... Internal bus, 21 ... Transmission saving permission flag, 22 ... Text saving buffer, 31 ... Digital output device, 32 ... Trigger input circuit.

Claims (3)

[Claims] 1. A command transmitted to a slave represented by a sensor from a controller via a transmission line,
After being converted into a transmission text by the transmission device, it is output to the slave via the smart transmission line, and the transmission result indicating whether or not the transmission text is normally transmitted is stored in the transmission device, and the storage result is stored. In a supervisory control device that displays the transmitted transmission result for investigating a transmission abnormality between the transmission device and the slave, a transmission text output to the slave, and a transmission text from the slave corresponding to the transmission text. A monitor / control device comprising a display means for displaying a response and a received text transmitted via the smart transmission line together with the transmission result. 2. A command transmitted to a slave represented by a sensor from a controller via a transmission line,
After being converted into a transmission text by the transmission device, it is output to the slave via the smart transmission line, and the transmission result indicating whether or not the transmission text is normally transmitted is stored in the transmission device, and the storage result is stored. A monitoring control device that displays the transmitted transmission result for investigating a transmission abnormality between the transmission device and the slave, wherein the transmission device is a transmission text transmitted to the slave via the smart transmission line. And a flag for determining whether to save the response from the slave corresponding to this transmission text and the reception text transmitted via the smart transmission line, and the flag is a transmission text. When the storage of the transmission text is permitted, the transmission text storage means for storing the transmission text and the flag Based on the received text storage means for storing the received text, the transmission text stored in the transmission text storage means, and the reception text stored in the reception text storage means when the storage of the text is permitted. A transmission status determining means for determining whether or not a transmission abnormality has occurred, and when the transmission status determining means determines that a transmission abnormality has occurred, the flag allows saving of the transmitted text and the received text. Setting means for setting not to perform, the controller displays the transmission text stored in the transmission text storage means and the reception text stored in the reception text storage means on the display together with the transmission result. And a display unit for displaying on the monitor control device. 3. A command to a slave represented by a sensor transmitted from a controller via a transmission line,
After being converted into a transmission text by the transmission device, it is output to the slave via the smart transmission line, and the transmission result indicating whether or not the transmission text is normally transmitted is stored in the transmission device, and the storage result is stored. A monitoring control device for displaying the transmitted transmission result for investigating a transmission abnormality between the transmission device and the slave, which is connected to the transmission line and input from the transmission device through the transmission line. Based on a transmission result, based on a control signal output at a predetermined timing when the controller determines that the transmission is abnormal, a trigger signal output unit for outputting a trigger signal is added, and the transmission device is the smart device. The transmitted text to be transmitted to the slave via the transmission line and the corresponding transmitted text from the slave An answer, a flag for determining whether to save the received text transmitted through the smart transmission line, and the transmission if the flag permits the storage of the transmitted text. Sending text saving means for saving text; received text saving means for saving the received text when the flag permits saving of received text; and a trigger signal input from the trigger signal output means And a setting unit configured to set to the flag that storage of the transmission text and the reception text is not permitted, and the controller stores the transmission text stored in the transmission text storage unit and the reception text storage unit. And a display means for displaying the received text on the display together with the transmission result. Monitor and control device.