JPH0656585B2 - Data display for distributed process controller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a data display device of a distributed process control device, and in particular, it is composed of a large number of controllers, and intensive high-speed online maintenance from one place is essential. The present invention relates to a data display device suitable for a distributed process control device.

More specifically, the present invention is directed to a common upper network, a plurality of lower networks connected to the upper network by at least one upper controller, and a lower controller connected to the lower network. The present invention relates to a data display device of a distributed process control device including a.

[Prior Art] Conventionally, in a distributed process control device using a microcomputer as a process control controller (hereinafter abbreviated as a controller), it is advantageous in terms of expandability, economical efficiency, space factor, etc. Each controller is connected via a network to transmit control signal data.

As the maintenance function of these distributed process control devices, there are the following types.

(A) The maintenance device is connected to each controller via an interface other than the interface of the network and 1:
Method to connect and maintain with 1.

(B) A method in which maintenance devices are individually connected and maintained for each network.

(C) A system in which an interface is provided for each different network, the signal lines are gathered in a star shape at one location, and maintenance is performed by a single maintenance device using a common signal switching device.

[Problems to be Solved by the Invention] In the above-mentioned conventional technique, there is the following problem as one of the maintenance functions in monitoring the calculation results of a plurality of controllers.

First, regarding the method (A), in order to monitor the states of two or more controllers at the same time, as many data display devices as the number of controllers desired to be simultaneously monitored are required, which complicates the configuration. And the cost will increase. Further, as the number of controllers increases, the space for installing the data display device in one place becomes a problem.

Next, regarding method (B), in order to monitor the status of the controllers on different networks at the same time,
Since data display devices corresponding to the number of networks are required, the configuration becomes complicated and the cost becomes high. As with the method (A) described above, if the number of networks is large, the installation space of the data display devices becomes a problem. Become.

Regarding method (C), the state of the controller of the designated network can be monitored by switching the switch of the changeover device with one data display device at one location. It is not possible to monitor the status of time at the same time.

Further, when the monitor processing of the controller which has started the monitoring once is ended, in the method (A), individually, the method (B)
Then, there is a troublesome work that must be performed for each network and for the method (C) while switching.

An object of the present invention is to enable one data display device to simultaneously monitor the states of the controllers connected to different networks at the same time without switching delay and transmission delay.

[Means for Solving Problems] FIG. 16 is a functional block diagram for explaining the means of the present invention, and FIG. 17 schematically shows how data is exchanged between blocks. It is a figure. Here, a case where the present invention is applied to a distributed process control device will be described as an example.

(1) The process control device, as shown in FIG.
It is composed of an upper controller 100, a lower controller 101, an upper network 200 connecting the respective upper controllers, and a lower network 201 connecting one certain upper controller 100 and a plurality of lower controllers 101 belonging thereto.

The process control is performed by performing a control operation on the lower controller 101 and the upper controller 100 based on the process signal 11 from the oscillator 10 and adding the result as an operation signal 21 to the operation end 20.

In the same lower network, information exchange between the upper controller 100 and the lower network 101 of the network is performed via the lower network 201.

On the other hand, data transmission between different lower networks is performed via the upper controller 100 and the upper network 200, and data transmission between the upper controllers 100 is performed via the upper network 200.

The data display device 300 includes a data display device main body 301,
It is composed of a CRT display device 302 and a keyboard 303.

Data transmission between the data display device 300 and the host controller 100 is performed via the host network 200 in the route of data display device 300 → host network 200 → host controller 100 → host network 200 → data display device 300.

On the other hand, the data display device 300 and the lower controller 101
Data transmission between the data display device 300 and the upper network 200 is performed via the upper network 200, the upper controller 100, and the lower network 201.
The process is performed in the route of upper controller 100 → lower network 201 → lower controller 101 → lower network 201 → higher controller 100 → higher network 200 → data display device 300.

(2) Each of the upper and lower controllers is unique (no duplicates) throughout the system,
Controller No. with the same number of digits (two digits here)
, And the number (or symbol) of a specific digit (upper digit here) is the same for the upper controller and the lower controller connected to the same lower network, and these are stored in each controller.

That is, the upper controller 100a and the lower controllers 101a and 101b connected thereto have the controller numbers "11", "12", and
"13" is assigned, and each upper digit (tens digit)
Are all "1".

The controller numbers of the upper controller 100b and the lower controllers 101c and 101d connected thereto are "21", "22", and "2", respectively.
3 "is assigned, and the upper digits of each are all" 2 ".

(3) The data display device 300 and each host controller 100 are assigned unique node numbers on the host network 200 and stored. For example, the data display device 300 has “4”, the upper controller 100a.
Is “1”, and the upper controller 100b is “2”,
It is assigned as each node number.

Also, each upper controller and its lower controller are assigned a unique node number on their respective lower networks and stored. For example, "1" is assigned to the upper controller 100a and its lower controller 1
"2" and "3" are assigned to 01a and 101b as the respective node numbers.

As a result, in each upper controller, the node number on the upper network 200 and the node number on the lower network are stored as their own node numbers. (Upper), (lower)
Are distinguished as. In addition, each upper controller 100
Is a correspondence table (node number correspondence table) between the controller numbers and node numbers of the subordinate controllers belonging to each.
00 is stored.

(4) The data display device 300 is provided with a correspondence table (node number table) 500 corresponding to the number (or symbol) of the specific digit of the controller number and the node number of each host controller on the host network.

(5) A monitor start (or end) command, a controller number to be monitored, and a monitor request signal point number are input to the data display device 300. In the following, as the controller No. to be monitored and its signal point number, [Controller No. 11, signal point number 002] [Controller No. 12, signal point number 005] [Controller No. 22, signal point number 010] [ It is assumed that four sets of controller No. 23 and signal point number 011] are input.

When the above data is input, as shown in FIG. 17, the data display device 300 attaches its own node number (= “4”), the monitor start command “F000”, and the controller number to be monitored. , And the signal point number are transmitted to the upper network 200.

Further, when such a controller No. and signal point number are input, the data display device 300 starts the above-mentioned node N from the specific digit (tens digit) of the input controller No.
o. Based on the table 500, the node number on the host network of the host controller to which each of the monitored controllers is connected (if the monitored controller is the host controller, the node number on its own host network). .) For each node number, a request signal management table (node number corresponding request signal management table) 600 (see FIG. 16) corresponding to the node numbers is created and stored.

That is, for the controller No. “11”, since the upper digit is “1”, it is determined from the node No. table 500 that it is the node “01”, and the node “01” is added to the beginning of the node No. corresponding request signal management table. "Register." Moreover, since there is only one signal point,
Set “1”.

Next, for controller No. 12, node No. = 1
Therefore, similarly to the above, the node "01" is set in the second stage, and since it is the second data of the same node, "2" is set in the corresponding portion.

Next, for controller No. 22, node No. = 2
Therefore, the node "02" is set in the third stage, and since it is the first data of the same node, "1" is set in the corresponding portion.

Next, regarding controller No. 23, node No. = 2
Therefore, similarly to the above, the node “02” is set in the fourth stage, and since it is the second data of the same node, “2” is set in the corresponding portion.

The node number corresponding request signal management table 600
The data display device 300, which has received data from each controller later, is used to display each data in a predetermined order, and the utilization method thereof will be described later in (9).

(6) Each upper controller 100 has the data display device 3
The transmission data from 00 is received, and the node number (= “4”) attached to this is compared with the number in its own memory. Each upper controller has a data display device 300.
Since the node number (= "4") of is stored in advance,
If the two match, the received data is recognized as coming from the data display device 300, and the received command, controller No., and signal point number are stored in its own memory as shown in FIG. , The same content is added to its own node number on the lower network (here, both of the upper controllers 100a and 100b are “1”) and transmitted to the lower network 201.

At this time, if the controller's own controller number (= “11”) is included in the data, as in the host controller 100a, the monitoring process is started and the designated signal point number = “002” The extracted signal data is taken out and temporarily stored in the transmission data buffer (upper layer).

(7) Lower controller (for example, controller 101
a) receives the transmission data from the host controller 100a and adds the node number (= “1”) added to it.
With the number in its own memory. Since each lower-level controller stores the node number of its own upper-level controller on the lower-level network in advance, when the two match, the following processing is executed according to the command type. .

That is, the received command is the monitor start command "F00.
0 ”indicates that the controller number (=
If "12") is included, monitor processing is started. Then, the signal data corresponding to the designated signal point number (= “005”) is taken out, and the lower network 20
The start node, the number of data words, and the signal data are transmitted to the lower network 201 with the own node No. (= “2”) on the No. 1 node.

(8) The upper controller 100a monitors the node number of each lower controller added to the data transmitted from the lower controller, and determines the controller number of the lower controller based on the node number correspondence table 400. To do.

That is, when the node number. = “2” is added to the received data, the upper controller 100a causes the lower controller 1 whose received data is the controller number = “12”.
Recognize that it was sent from 01a. The controller No. = “12” matches the controller No. registered in the previously stored received data (that is, the controller No. input to the data display device 300 as a monitor target). If the command in the received data is a command that matches the command (monitor start command) previously sent to the lower controller 101a by itself, the received data is temporarily stored in the transmission data buffer (upper). .

Then, when the data from all the lower controllers to be monitored is received, the upper network 2
The contents (start command, number of data words, and signal data) of the transmission data buffer (upper layer) with its own node No. 00 on 00 are transmitted to the upper network 200.

That is, in the case of the upper controller 100a, the data from the lower controller 101a is received, and the node number.
= "1" is added and transmitted to the upper network 200. In the case of the upper controller 100b, the data from the lower controllers 101c and 101d are transmitted,
Add node No. = "2" and send in the same order as when receiving.

(9) When the data display device 300 completes the reception of the monitor start command, the number of data words, and the signal data from all (four in this case) controllers to be monitored via the host controller, the node number. Based on the correspondence request signal management table 600, the data is edited and displayed in the order of the controller numbers input from the input device.

That is, the data sent from each host controller has the node number of each host controller on the host network added, and the data of each controller connected to the same host network is the host controller. Since they are collectively transmitted in a scheduled order, if the data are arranged in the order of the node numbers stored in the node number corresponding request signal management table 600, the data can be edited in the order of the requests input from the input device. Can be displayed.

(10) On the other hand, when the monitor end command is input to the data display device 300, the data display device displays its own node number (=
"4") and the monitor end command are sent together with the same controller No. and signal point number as the above monitor start command.

(11) For example, when the upper controller 100a receives the monitor end command from the data display device 300, the node number of its own node on the lower network is the same as above.
(= “1”) is added and transmitted to the lower network 201a.

(12) Lower controller 1 that received the monitor end command
01 completes the monitor process, and each node No.
And an end command are transmitted to the lower network 201.

(13) Upon receiving the end command from the lower controller, the upper controller 100 transmits only the end command to the upper network in the same manner as above when receiving the end commands from all the lower controllers requested to monitor.

(14) The data display device 300 monitors the reception data received from the host controller, and when all the controllers confirm the reception of the command (end command) at the time of transmission, displays a message indicating that the monitoring is completed.

[Operation] When the monitor start command, controller No., and its signal point number are sent from the data display device to the host network, the monitor start command, controller number, and signal point number are sent to the host controller. Since the node number is stored in advance, the host controller can recognize that the received data is from the data display device without delay.

Next, the host controller, which knows from the monitor command that the monitor start command has been issued and whose controller No. data in the received data and its own controller No. match, can immediately proceed to the monitor processing.

At the same time, the data after the monitor start request is transmitted by the upper controller to the lower network together with the node number of the upper controller on the lower network.

As a result, the lower controller determines whether or not the node number of the upper controller matches that stored in itself, and further, the command decoding process and the controller number of the received data match the controller number of itself. The determination processing as to whether or not it is performed can be executed in parallel with other controllers.

In other words, the above start command and controller No. are sent to all the upper and lower controllers of the process control device.
And the signal point number can be transmitted quickly.

Next, the upper controller is the node from the lower controller.
Since the No. and the data are received together, the controller No. can be easily recognized by using the node No. correspondence table of the controllers belonging to the lower network.

Then, when the host controller determines that the monitor start command has been received from all the controllers for the matching controller No. to be monitored received from the data display device, the host controller also starts itself as described above. If there is a command, the edited data is also collected, and in the format of the requested data, the node number, monitor start command, number of data words, and signal data of the host controller on the host network,
The monitor data of the controller on the lower network is collectively transmitted to the upper network.

Therefore, the data display device can receive this with a time difference of about the delay of the transmission cycle between the respective host controllers, and the node number corresponding request signal management table 600 can be received.
Based on the above, the data can be easily edited and displayed on the display device in the order of input from the input device.

In other words, the data display device does not need to edit the data received from the lower controller, and the time difference between the signals and the data reception between the upper controllers can be reduced, so that the data of the controllers of different networks can be mutually exchanged. It is possible to reduce the time delay of and display them on the monitor at the same time.

[Example] An example of the present invention will be described below.

FIG. 1 is an example in which the present invention is applied to a distributed process control device, and the same reference numerals as those used above represent the same or equivalent parts. 2 is a detailed block diagram of the data display device 300, FIG. 3 is a detailed block diagram of the upper controller 100, and FIG. 4 is a detailed block diagram of the lower controller 101. The operation of the embodiment will be described below with reference to these drawings.

First, the monitor command from the keyboard 303 shown in FIG. 2, the controller No., the signal point number is input, the key input processing unit 301 ₁ takes these data into the input data buffer 301 _2, this, in the 12 format as shown in FIG., the transmission editing processor 301 ₃ set to the transmission buffer 301 _4, the transmission processing unit 301 ₅ with the data display device node No.301 ₆ to the top of this data, the upper It is transmitted to the network 200 at the timing of the transmission cycle.

Edit processing table creation processing 301 ₇ refers to the node No. table 301 ₈ illustrates an example in FIG. 13, the first
4 create a node, such as shown in FIG No. corresponding request signal data management table 301 _9.

FIG. 12 shows a format when the data display device 300 requests data monitoring as shown in FIG. 7 (which will be described later in detail) in the system configuration shown in FIG.

In Fig. 1, the upper and lower controller numbers are composed of 2 digits, and the upper digit numbers correspond to the node numbers of the upper controller. The second digit (upper digit) number of the lower controller is the upper digit. Matched to that of the controller.

13 is a node No. table 301 ₈ showing the correspondence of the aforementioned controller No. upper digit (the ASCII code) and the node No..

If the data in Figure 12 is entered, the editing processing table creation processing section 301 ₇ of the data display device body 301,
First, as for the controller No. “11”, since the higher digit is “1”, it is determined from the node No. table of FIG. 13 that it is the node “01” corresponding to “31”, and at the beginning of FIG. Register the node "01". Also, the first
Since there is only one signal point in FIG. 2, "1" is set in the corresponding portion in FIG.

Next, regarding the host controller 21 in FIG. 1, since the node number is 2, the “2” is set in FIG. 14 and the corresponding data is set to “1” to mean the first data. .

Similarly, for the lower controller 22, the node number =
Since it is 2, set Node No. = 2 as above,
Since it is the second data of the same node, "2" is set in the corresponding portion in FIG.

The upper controller 100 is the upper network 20.
The signal sent to 0 (see FIG. 12) is received by the reception processing unit 100 ₁ shown in FIG. 3, and the node numbers of the data display device and the node numbers of other upper controllers are stored.
Comparing the contents of the table 100 ₂ and the receiving node No..

As a result, the receiving node number is the node number of the data display device.
When it recognizes that this is takes in the received data in the reception management table (upper) 100 ₃ receives data area (upper) 100 ₄ that is defined for each node No. In.

Next, the information edit processing unit (upper) 100 ₅ refers to the reception specification table 100 ₆ (upper) and moves the contents of the data display device reception data area (upper) 100 ₃ to the reception data buffer (upper) 100 ₇ . , the data stored in the reception data area (upper) 100 ₄ transmitted from another host controller receives each specification table 10
0 ₆ post to the result area 100 ₈ specified in.

The contents of the result area 100 _8, the control operation processing unit 10
0 ₁₉ updates the data according to the control calculation cycle.

Next command decoding data transcription processing unit 100 _9, data of the received data buffer (upper) 100 ₇ (FIG. 12 shows an example) decodes the commands, the data edit processing section 1
00 ₁₀ together to start, own controller No.10
It is determined whether 0 ₁₁ is included in the above data.

If it is included, the data edit processing unit 100 ₁₀ fetches the data of the designated point number from the calculation result area 100 ₈ and sets it at a predetermined position of the transmission data buffer (upper) 100 ₁₂ . Next, the data in the reception data buffer (upper) 100 ₇ is transferred to the transmission data buffer (upper)
Transfer to 100 ₁₂

Transmitting editing processor (lower) 100 _14, the contents of the transmission data buffer (lower) 100 ₁₃ and the operation result area 100 _8, edited based on the transmission specification table (lower) 100 _15, transmission buffer (lower) 100 Write to ₁₆ .

The transmission processing unit (lower) 100 ₁₇
With the own node No.100 ₁₈ on lower network, the underlying network 201 at the timing of the transmission cycle
Send on.

Lower-level controller 101, a signal fed on the lower network 201 as described above, received by the reception processing unit 101 ₁ shown in FIG. 4, the other controllers on lower network node No. are stored Compare and contrast the contents of the node No. table 101 _2.

As a result, the node N of the host controller is included in the received signal.
o. is recognized, it takes in the received data to the designated position of the receiving control table 101 ₃ receives data area 101 ₄ defined per node No. In.

Receiving editing processor 101 _5, receives specification table 101 ₆
Referring to, the reception data area 101 for the host controller
The contents of the ₄ was transferred to the reception data buffer 101 _7, also the data stored in the other in the reception data area 101 ₄ is transmitted from the lower controller, the operation result area 101 ₈ specified in the received specification table 101 _6, respectively Post to.

Next, command decoding data editing unit 101 ₉ decrypts the command data of the received data buffer 101 ₇ (FIG. 12 and its one example). "F00" in FIG.
Since 0 "is a monitor start command, the monitor process is started in accordance with this.

That is, the command decoding / data edit processing unit 101
₉ determines whether or not the self controller No. 101 ₁₀ is in the above data, and if there is, reads out the data related to the designated point number from the operation result area 10 _18, and reads this data at the predetermined position of the transmission data buffer 101 ₁₁ . Set to. The contents of the result area 101 ₈ is updated in accordance with the control operation cycle by the control processing unit 101 _12.

The transmission editing processing unit 101 ₁₃ uses the transmission specification table 101 ₁₄
Based on, edit the contents of the transmission data buffer 101 ₁₁ and the operation result area 101 _8, the transmission buffer 101
Write to ₁₅ . Transmission processing unit 101 _16, and transmits the timing transmission cycle with the self node No.101 ₁₇ to the top of the data on the lower network 201.

The format of the transmission data in this case consists of a command, the number of data words, and signal data, as shown in FIG.
As can be seen by comparing with FIG. 12, the data “92” and “95” in FIG. 15 are the data of the point numbers A005 and A010, respectively.

Next, the upper controller 100 receives the signal transmitted from the lower controller 101 to the lower network 201 as described above, and receives the signal from the reception processing unit (lower) 100 shown in FIG.
Received by ₂₀ and node number table 1 of lower controller
The contents of 00 ₂₁ are compared with the receiving node No., and the above reception data is fetched into the reception data area 100 ₂₃ defined for each node in the reception management table (lower) 100 ₂₂ .

The reception edit processing unit (lower) 100 ₂₄ refers to the reception specification table (lower) 100 ₂₅ , and receives the reception data area 100 _23.
From the above, only the command, the number of data words, and the signal data are taken out and transferred to the reception data buffer (lower) 100 ₂₆ , and other control data are transferred to the operation result area 100 ₈ .

The data edit processing unit 100 ₁₀ checks the content of the received data buffer (lower level) 100 ₂₆ for each node. Then, the node that received the command, based on the node No. correspondence table 100 ₂₇ that stores a correspondence relationship between the lower-level controller controller No. and a node No., node No. controller No. It converted, and stored in the reception data buffer (upper) 100 ₇ controller No.
Check with.

For those both controllers No. matches, it further to a reception signal data and the total number of words arranged in order of the contents of the received data buffer (upper) 100 _7, there are all from the appropriate controller response ( After confirming that the requested monitor data has been sent from all the controllers specified by the storage device,
The command stored in the reception data buffer (upper) 100 ₇ is written in the transmission data buffer (upper) 100 ₁₂ .

The transmission edit processing unit (upper) 100 ₂₈ edits the contents of the transmission data buffer (upper) 100 ₁₂ and the operation result area 100 ₈ based on the transmission specification table (upper) 100 ₂₉ , and the transmission buffer (upper) 100 ₃₀ Set to.

The transmission processing unit (upper) 100 ₃₁ adds its own node No. 100 ₃₂ on the upper network to the beginning of this data,
It is transmitted to the upper network 200 at the timing of the transmission cycle.

Next, the data display device body 301 receives the signal transmitted from the upper controller 100 to the upper network 200 as described above by the reception processing unit 301 ₁₀ shown in FIG. ₁₁
The received data area 3 defined for each node in the reception management table 301 ₁₂ by comparing and comparing the contents of
The received data is fetched at 01 ₁₃ .

The reception edit processing unit 301 ₁₄ refers to the reception specification table 301 ₁₅ and moves the contents of the reception data area 301 ₁₃ to the reception data buffer 301 ₁₆ .

Data editing processing unit 301 _17, node was created earlier No.
Refer to the corresponding request signal data management table 301 ₉ (Fig. 14 is one example), the reception data buffer 301
₁₆ contents (Fig. 5 an example for Figure 12) to set the display buffer 301 ₁₈ by editing.

Data display processing unit 301 _19, based on the contents of the display buffer 301 _18, controller No., displays a signal point number and signal data, the CRT display device 302 in the order entered when monitoring request.

Regarding the processing of the monitor end command, the controller that issued the end command and start command from the data display device
When the No. and signal point number are transmitted, the data is transmitted by the same route and processing as described above.

When the controller receives the above-mentioned various data, it terminates the monitor process and returns an end command to the data display device. When all of the corresponding controllers have returned the end command and the data display device has received the end command, the monitor end message is displayed on the CRT display device.

FIGS. 6 to 9 show the case where the present invention is applied to the online trend graph display function of the data display device 300. (a) A method of designating a monitor signal to be read from the controller for displaying a graph and a CRT display screen. And (b) an operation procedure for displaying the trend graph of the designated signal on the CRT and an example of the CRT display screen. This content will be described below.

Generally, in a trend graph, when a large number of data are displayed on one CRT screen at the same time, the screen is congested and the visibility is impaired, and even if color CRT is used to display by color, a maximum of 6 display colors ( Considering that it is about black (excluding black), about 6 lines of data per screen are simultaneously displayed, and by switching to another screen, data of other signals at the same time can be monitored.

That is, since only about 6 points can be displayed on one screen, the required number of screens are fetched, but only the data corresponding to the screen requested to be displayed is displayed on the screen. . Below, this screen is identified by the page number.

FIG. 6 shows a procedure for setting trend display items. In step 61, the page number (for example, 1) is input to specify the display screen, and then in step 62, the time axis scale (for example, 6 minutes) of the trend graph display frame is selected.

At step 63, individual signal points are selected and a display scale and unit are input. That is, first, in order to specify which controller the signal belongs to, the controller No. (for example, 11) is input, and then the point number (for example, A00
Enter 2).

Further, the calculation range lower limit value MIN (for example, -1
00) and upper limit value MAX (for example, +100), calculated value central value C ₁ (for example, 0), display data central value C ₂ (for example, 50%), display gain G (for example, 1.0), and display item. Enter the name (eg, MWE), engineering unit range lower limit (eg, 0) and upper limit (eg, 1000), and engineering unit (eg, MW).

After setting the display items and parameters for one page,
In step 64, it is determined whether or not another page needs to be set, and if necessary, the steps 61 to 63 are repeated, and if not necessary, the process ends. In the above,
Numerical values shown in parentheses are for channel (CH) 1 in Figure 7.
It corresponds to.

Using the values entered above, the value Y on the graph display
Is calculated by the following equation, where X is the value of the data transmitted from the controller.

In the case of the set values illustrated in () above, the value Y on the graph display is as follows.

FIG. 7 shows a display example of a CRT screen in which display items are set by the procedure described in FIG. This example is page N
It displays the setting contents of o.1, and up to 6 trend points can be registered on one page, but analog signals of signal points A002, A005, A010 on channels 1 to 3 and channel 4 on A total of four digital signals at signal point D101 are set.

The details of each item in FIG. 7 are as follows.

CH: Channel (display graph number) CTL.No .: Controller No. PT.No .: Point number COMP.RANGE (LOWER): Calculation range lower limit COMP.RANGE (UPPER): Calculation range upper limit CENTER (VALUE): Calculation Center value CENTER (%): Display data center value GAIN: Display gain NAME: Display item name ENG.RANGE (LOWER): Engineering unit range lower limit ENG.RANGE (UPPER): Engineering unit range upper limit UNIT: Engineering unit 6 shows the procedure from the start to the end of the trend graph display for the page for which display items are set according to FIG.

First, in step 81, the page number (for example, page number.
When 1) is selected and the monitor start command is input in step 82, the monitor command, controller No., and signal point number are transmitted from the data display device 300 to the controller as described above (see FIG. 12). The relevant data is sent out from the controller on the network at a predetermined cycle (see FIG. 5).

In step 83, the data display device 300 receives this and displays it as a trend graph. A specific example of the display will be described later with reference to FIG. Step 84
At, it is determined whether or not to end the display. When ending, the process proceeds to the next step 85.

When the operator inputs an end command, it is determined to end in step 84, and the end command is transmitted to the corresponding controller in step 85. The corresponding controller terminates the monitoring process and returns a termination command to the data display device. The data display device ends the trend graph display process when it receives this end command from all the corresponding controllers.

FIG. 9 shows a CRT screen display example of a trend graph when the display processing is performed according to the procedure of FIG. In this example, a trend graph of signals corresponding to the setting items in FIG. 7 is displayed, and analog signals are displayed on channels 1, 2, 3 and digital signals are displayed on channel 4.

The numbers near the graph shown in the figure represent the channel numbers. The engineering unit scale of each analog signal is channel 1 from the left end to the right end of the graph display frame.
The upper limit value and the unit are displayed on the upper end of the display frame, and the lower limit value is displayed on the lower end of the display frame in order from the first one.

In FIG. 9, H1, H2, H3, ..., B1, B
2, B3, ... Represent the engineering unit range of channels 1, 2, 3 ,. Further, "VALUE" in the figure represents the current value of the data of each channel.

FIG. 10 shows an internal processing flow of the host controller 100. The processing of steps 101 to 107 is repeatedly executed in order at a predetermined cycle.

In step 101, the reception edit processing unit (upper) 100 ₅
The reception data from the upper network 200 is edited, step 102, by receiving the editing processing unit (lower) 100 _24, data received from the lower network is edited.

In step 103, the control calculation processing unit 100 ₁₉ executes control calculation based on the data received above and the control calculation processing result of the previous cycle.

In step 104, the posting process to lower network transmission data buffer decoding the received data of the command from the data display device 300 is performed by command decoding data transcription processing unit 100 _9.

In step 105, the data edit processing unit 100 _{10 transfers} the received data from the lower controller and the calculation result of the own controller to the transmission data buffer (upper) 100 ₁₂ .

In step 106, the transmission edit processing unit (lower level) 100 ₁₄
By this, the contents of the transmission data buffer (lower) 100 ₁₃ and the operation result area 100 ₈ are edited and transferred to the transmission buffer (lower) 100 ₁₆ .

In step 107, the transmission edit processing unit (upper) 100 ₂₈
Thus, the contents of the transmission data buffer (upper) 100 ₁₂ and the operation result area 100 ₈ are edited and transferred to the upper network transmission buffer (upper) 100 ₃₀ .

FIG. 11 shows an internal processing flow of the lower controller 101. The processing of steps 111 to 114 is repeatedly executed in order at a predetermined cycle.

In step 111, by receiving the editing processor 101 ₅ of the lower network is edited data received from the lower network 201, in step 112, based on the control operation result data and the previous period received by the control processing The control calculation is executed by the unit 101 ₁₂ .

In step 113, the calculation result area 101 is received in correspondence with the command and the received data from the data display device 300.
The data editing from ₈ performed by command decoding data editing unit 101 _9, the result is transmission data buffer 1
It is transferred to 01 ₁₁ .

In step 114, by transmitting the edit processing unit 101 _13, the transmission data buffer 101 ₁₁ a calculation result area 10
The contents of ₁₈ are edited and transferred to the transmission buffer 101 ₁₅ for the lower network 201.

In the above explanation, in order to clarify the mutual relationship between the controller node numbers and controller numbers on each network, each controller must have a unique controller number with the same number of digits that does not overlap each other. . And the node number on each network are assigned, and those having the same digit number or symbol of the controller number connected to the lower network are the same, but instead show the mutual relationship. It will be easily understood that even if the table is provided in the host controller and / or the data display device, the same monitor operation as described above is possible.

[Effects of the Invention] According to the present invention, it is possible to quickly and simultaneously monitor arbitrary data of arbitrary controllers on different networks with one data display device, and also to easily perform an ending operation.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an embodiment of the present invention. FIG. 2 is a detailed block diagram of the data display device main body shown in FIG. FIG. 3 is a detailed block diagram of the lower controller shown in FIG. FIG. 4 is a detailed block diagram of the lower controller shown in FIG. FIG. 5 is a diagram showing a format example of data received from the host controller in the data display device. FIG. 6 is a flowchart showing a procedure for setting items to be displayed on the trend graph. FIG. 7 is a diagram showing a specific example of display items of the trend graph. FIG. 8 is a flowchart showing a procedure for displaying the trend graph on the data display device. FIG. 9 is a diagram showing a display example of the trend graph. FIG. 10 is a flowchart showing the internal processing procedure of the host controller. FIG. 11 is a flowchart showing the internal processing procedure of the lower controller. FIG. 12 is a diagram showing the format of data transmitted from the data display device to the host controller at the start of monitoring. FIG. 13 is a diagram showing a specific example of the node number table provided in the data display device. FIG. 14 is a diagram showing a specific example of the node number correspondence request data management table provided in the data display device. FIG. 15 is a diagram showing an example of the format of data transmitted from the lower controller to the upper controller. FIG. 16 is a functional block diagram for explaining the means of the present invention. FIG. 17 is a diagram schematically showing how data is exchanged. 10 ... Transmitter, 20 ... Operating end, 100 ... Upper controller, 101 ... Lower controller, 200 ... Upper network, 201 ... Lower network, 300
...... Data display device, 301 …… Data display device main body,
302 ... CRT display device, 303 ... keyboard, 1
00 ₂ ...... node number table of data display device and other upper controller, 100 ₅ ...... reception edit processing section (upper), 100 ₉ ...... command decoding / data transfer processing section, 100 ₁₄ ...... send edit processing section (Lower), 100 ₂₄ ...
... receiving editing processor (lower), 100 ₂₇ ...... node No. correspondence table, 100 ₂₈ ...... sending editing processor (upper), 101 ₂
...... Node numbers of other controllers on the lower network
Table, 101 ₅ ...... Reception edit processing section, 101 ₉ ......
Command explanation / data edit processing unit, 101 ₁₃ ...... Send edit processing unit, 301 ₃ ...... Send edit processing unit, 301 ₇ ......
Editing process for table creation processing unit, 301 ₉ ...... node N
o. Correspondence request signal data management table, 301 ₁₁ ...... Higher controller node number, 301 ₁₄ ...... Reception edit processing section, 301 ₁₇ ...... Data edit processing section, 301 ₁₈ ...... Display buffer, 301 ₁₉ ...... Data Display processing unit

Claims (5)

[Claims] 1. A distributed process control apparatus comprising a common upper network, a plurality of lower networks each connected to the upper network by at least one upper controller, and a lower controller connected to the lower network. Of the data display device connected to the upper network and having a display device and an input device, wherein each controller has a unique controller number through the system, and the data display device and each upper controller are connected through the upper network. Unique node
No. (upper), each upper controller and each lower controller also has a unique node No. (lower) through the lower network, and the data display device has the input monitor start command, controller No., The host controller is equipped with means for transmitting these data to the host network by adding its node number to the signal point number or monitor end command, and the host controller has the node number of the controller connected to itself and its node number. Means to store the correspondence table with the controller No. and the self-related data on the upper network are taken in, and the node No.
Is added to the lower network, and a means to determine whether or not the controller number of the own self is included in the captured self-related data. Controller in the data transferred to
If there is a controller number of its own, and if it has its own controller number, add the node number of its own to the data of the requested signal point number and send it to the lower network. The upper controller further comprises means for taking in the data transmitted from the lower controller to the lower network, means for judging that the data from all the lower controllers to be monitored have been taken in, and the monitoring target. When data from all lower controllers of
When there is a monitor request for itself as well, the data fetched from the lower controller is edited together with its own data, and the node number of its own node on the upper network is added and the data is sent to the upper network. The data display device further comprises means for capturing data transmitted from the host controller to the host network,
A means to determine that the data from all the higher-level controllers to be monitored has been acquired, and when the data from all the higher-level controllers to be monitored have been acquired, the data acquired from the higher-level controller is used in the planned format. And a means for displaying the data on a display device according to the above paragraph. 2. The data display device comprises a value or symbol at a specific digit of the controller No. of each controller to be monitored,
When the monitor data is displayed on the display device, the host controller is further equipped with a node number correspondence request signal management table that shows the correspondence relationship between the host controller to which each controller is connected and the node number on the host network. Data acquired with the controller No. of node N
o. The data display device of the distributed process control device according to claim 1, wherein the data is edited in advance in the order of the controller numbers input from the input device based on the correspondence request signal data management table. 3. The upper controller, when transmitting the data fetched from the lower controller via the lower network and its own data to the upper network, pre-edits these data in the order requested by the data display device. The data display device of the distributed process control device according to claim 1 or 2, characterized in that. 4. The host controller, when the command received from the data display device is a monitor end command,
The data display of the distributed process control device according to claim 1, wherein only the end command is returned to the upper network when the data from all the requested lower controllers are fetched. apparatus. 5. The lower controller, when the command received from the upper controller is a monitor start command, arranges the data of the specified signal numbers in advance in the specified order and transmits them to the lower network. The data display device of the distributed process control device according to claim 1, wherein