JP3456692B2 - Data processing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing device, and in particular, a data processing means having a model-specific communication protocol such as a programmable logic controller (hereinafter abbreviated as "PLC") and a personal computer. The present invention relates to a data processing unit having a common communication protocol such as an application device and capable of exchanging data with each other.

[0002]

2. Description of the Related Art Conventionally, even when a plurality of PLCs are used in association with each other, data is transferred between such devices by positioning the PLCs as the center of control and prescribing a plurality of PLCs and a host computer. Directly via the interface circuit of or, indirectly through a dedicated adapter, between each PLC and PLC
Various data was exchanged between the host computer and the host computer using the communication function on the PLC side.

[0003]

However, the PLC
Has a history of development from a sequencer that uses relays, and its specialty is related to I / O control such as switch on / off control and data acquisition from sensors, and data communication is possible even if possible. There is a lot of burden to be the center of the.

Further, PLCs have different communication protocols to be used for data communication for each product depending on the manufacturing company or the same company, and as a result, there are innumerable communication protocols to be supported by the host computer, and connection is attempted. It is extremely inconvenient to use because it is necessary to newly prepare a communication protocol dedicated to the host computer corresponding to the PLC.

As a result of considering the above problem, the present inventor has obtained the following findings. That is, since the programmable display device that has been dedicated to display has been developed as a personal computer application device, data communication with a general-purpose personal computer device can be easily performed using a general-purpose protocol. Further, since the display device requires data communication with the PLC, it is general that a dedicated communication protocol corresponding to the PLC to be connected has already been developed.

Therefore, when this display device is positioned at the center of communication and the PLCs and the host computer are connected via the display device, the display device serves as a protocol conversion means during data communication. .

The present invention has been made on the basis of such knowledge, and by using a data processing device such as a program type display device, which is conventionally used only for displaying a control state, as the center of communication. , PLC can be devoted to I / O control, which is the original function, and the load on PLC can be reduced. At the same time, there are innumerable PLC communication protocols on the side of various data processing means including the host computer connected at the same time. It is an object of the present invention to provide a data processing device capable of significantly reducing the man-hours of software by eliminating the need to consider.

[0008]

As shown in FIG. 1, a data processing device 22 according to the present invention includes a first data processing means 10 for transferring data by a communication protocol unique to the model, such as a PLC. A predetermined data processing operation is performed with the second data processing means 11 that exchanges data by a common communication protocol like a general-purpose personal computer device.

[0009] Here, the second data processing means 11 common interface unit 12 for transferring the data in a common communication protocol is connected to a, and at the same time can be connected to the first data processing means 10 of the multiple, the first data processing means each 10 individual to perform data communication, and <br/> dedicated interferent i scan means 13 to enable transfer of data in a dedicated communication protocol corresponding, common interface unit 12 and be between dedicated interferent i scan unit 13, and a protocol conversion unit 14 for converting a communication protocol.

The above-mentioned common interface means 12
Data is passed between the second data processing means 11 and the second data processing means 11 in a common data format in which the content to be processed is represented by an intermediate code that does not depend on the model, while the protocol conversion means 14 uses the intermediate code and the above-mentioned exclusive use. Interf
First data which may be connected to the means 13
Conversion with dedicated code used in processing means 11
A dedicated data format that is provided with data for use and can be exchanged with the first data processing means 10 that should perform data communication;
It is characterized by enabling mutual conversion of data with a common data format passed between the second data processing means 11.

The above-mentioned common interface means 12
The display means 17 for enabling a predetermined display operation and the memory means 18 for enabling the storage operation of data are provided between the dedicated interface means 13 and the dedicated interface means 13, and the first data is displayed on the display means 17. Control state in processing means 10
By enabling the display corresponding to
It is possible to operate as a display device. And display hand
Data is passed between the stage 17 and the memory means 18 in a common data format.

The first data processing means 10 is a PLC,
2 The data processing means 11 is a personal computer device, and
In the data transferred via the common interface means 12 described above, a code specifying screen processing in the display means 17, a code specifying memory access to the memory means 18, and the first data processing means 10 are included. And a code for specifying a data communication process between them . Then, the code that identifies the data communication process
The first data specified by the second data processing means 11 is
When sent to the processing means 10, the protocol conversion means
14 is used by the corresponding first data processing means 10.
After using the conversion data to convert it into a dedicated code,
Data transmission operation through dedicated interface means 13
The work is done .

[0013]

As described above, according to the present invention, data is transferred between the common interface means 12 and the general-purpose data processing means 11 such as a personal computer by using a general-purpose communication protocol to provide a dedicated interface. Means 13
And data processing means 1 having a specific function such as PLC
Data is transferred to and from 0 by a communication protocol peculiar to the model, and both interface means 12
Since the means 14 for converting the protocol between 13 is provided,
Data can be transferred in real time between a plurality of data processing means having different communication protocols without being aware of the difference in the communication protocols.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is provided in a target system 20 such as a belt conveyor type automatic assembling machine by using a PLC 19 provided as a first data processing means as shown in FIG. A description will be given based on an example in which a device of a controlled system can be sequence-controlled and a programmable display device 22 is used as a control panel for the PLC, but the invention is not limited to this. Also, even when various personal computer-applied devices are used as the second data processing means, the same operation can be performed.

The PLC 19 is realized as a whole PLC by a circuit being unitized for each required individual function such as a CPU unit and a memory unit, and by appropriately adding each unit through a bus line as needed. The configuration is substantially the same as that of the conventional one, in which the number of functions can be increased or decreased.

In this embodiment, a CPU unit 23 for controlling the entire PLC 19, an input unit 25 for directly receiving a detection signal sent from the target system 20, and a target system 20 are provided. Output unit 2 capable of outputting a predetermined control signal
6, a memory unit 24 that stores various data, and a computer link unit 27 that enables predetermined data communication with the programmable display device 22 as a basic unit, and the CPU unit 23 is a constant input / output unit. The change state is monitored, and when a data change such as new data input is recognized, the necessary arithmetic processing is performed and then the corresponding address on the memory unit 24 is accessed to read or write the contents, or the output unit 26 is read. Send data to.

In addition, the storage location of the state data directly input / output to / from the target system 20 or used for controlling the target system 20 is passive such as a level meter or a limit switch provided on the target system 20 to be controlled or displayed. A word device is provided for the word data such as numerical values which are secured on the memory unit 24 for each component, active component such as relay or motor, or data setting component such as counter or printer. However, for bit data such as on / off information, the bit device
It is set in the memory unit 24 so that the storage location can be specified by designating a device name or address such as "X001" peculiar to the model.

Therefore, only by specifying and accessing an arbitrary word device or bit device in the memory unit 24 from inside or outside the PLC 19,
The corresponding position of the target system 20 can be controlled or information about its operating status can be retrieved individually.

The PLC 19 receives a command sent from another data processing device, and writes or reads data corresponding to the command to or from the memory unit 24, or a passive operation such as sending back the sent command or data as it is. A general data transmission function is generally provided, but it is needless to say that it can be implemented in a similar manner even when it has an active data transmission function.

The programmable display device 22 includes a PLC 19
Together with this, it is incorporated into an operation console or the like of the target system 20 or is independently provided and is used as a control panel for the target system 20.

For example, as shown in FIG. 3, a screen 29 using a liquid crystal display device as the display 28 is arranged on the front side of a substantially rectangular casing, and a touch panel 30 is arranged in close contact with the screen 29. On the other hand, the display control circuit 31 shown in FIG. 2 is housed inside the housing.

With this configuration, the PLC 1 is displayed on the screen 29.
The display corresponding to the control state of the target system 20 in 9 is performed, and at the same time, the data input by the fingertip via the touch panel 30 and the touch panel controller 32 and the indirect control of the target system 20 side via the PLC 19 are enabled.

As the data input means of the programmable display device 22, it is needless to say that instead of or in addition to the touch panel 30, various manual data input means such as a pointing device such as a mouse and a keyboard can be used. .

The basic structure of the display control circuit 31 is substantially the same as that of a general-purpose personal computer device, and various memories such as the CPU 34, the ROM 35, the RAM 36, and the graphic controller 37 are connected via the bus line 33. While the CPU 34 performs a predetermined arithmetic operation according to the system program stored in the ROM 35, R
The various calculation results appropriately stored in the AM 36 are developed as a bit image by the graphic controller 37 using various display data, and the display corresponding to the contents is displayed on the screen 29 of the display 28.

Furthermore, the communication controller 38 and the computer link unit 27 on the PLC 19 side, which allow various data to be transferred by a dedicated protocol specialized for the circuit configuration of the PLC 19, have a dedicated communication line 3 in a serial state.
9 are connected.

The communication controller 38 is provided with a plurality (three in this embodiment) of communication ports 40, one PLC 19 can be connected to each communication port 40, and the communication procedure will be described later. , So that data communication is performed with each other.

Here, in the programmable display device 22, a static figure 41 such as a nameplate illustrated in FIG. 3 whose display contents do not need to be changed, or a part figure 42 such as a switch shape for changing the shape, blinking or changing the color. A unit screen is a display screen configured by including one or more on the base screen. Further, a plurality of unit screens are provided in the single programmable display device 22 for data processing, and by designating a different file number F for each unit screen, it is necessary only to switch the unit screens. A display screen showing the operation contents is obtained.

Furthermore, when one unit screen is selected, a processing instruction word W as illustrated in FIG. 4A related to the selected unit screen is stored in advance in the event data memory 43. In addition, the processing instruction word W is read out intermittently at every minute time, and the operation of the content specified by the event name N of each processing instruction word W is displayed from the PLC 19 side.
By sequentially executing the operation while referring to the data taken out to the side, the display operation is performed on the display screen in which the component graphic 42 and the display data change in response to the change in the contents of the bit device or the word device on the PLC 19 side. .

That is, the basic structure of the processing instruction word W is substantially the same, and the file number F of the base screen on which the display control operation is to be executed and the event name for specifying the operation content to be executed on the base screen. N and reference information r that is referred to for each execution event and is composed of one or more data are provided as one set.

For example, the processing instruction word WT shown in FIG.
Is capable of reversing the bit device set at a predetermined address position in the state data memory 44 in conjunction with the pressing instruction operation on the touch panel 30. That is, the file number F1 of the unit screen and the touch panel 3
An event name N that starts with "T" that specifies the operation of 0
1, an input coordinate range X / Y that validates an input operation from the touch panel 30, and an address A at which data should be rewritten in conjunction with a push operation on the touch panel 30.

Further, the processing instruction word WL shown in FIG.
In conjunction with the operation of the touch panel 30 described above, a predetermined graphic can be displayed at a corresponding position on the display screen. That is, the file number F1 of the base screen, the event name N2 starting from "L" for specifying the display of the part graphic 42, the display coordinate range XY of the part graphic 42, the file number FL specifying the part graphic 42 to be called, the part It is composed of an address A which is referred to when the graphic 42 is displayed.

Then, as shown in FIG. 3A, the coordinate range X / Y
And the reference address A are made to coincide with each other, two processing instruction words WL1 and WT1 are set in the event data memory 43 in advance. In addition, the state data memory 4 provided on the PLC 19 side
If the bit device at the address A of 4 is "0" and it is made to correspond to the off state of the switch in advance, the PLC 19 turns off the actual switch contact to be controlled on the target system 20 side. At the same time, the part graphic 42 corresponding to the OFF state of the switch
The data FL1 of 1 is read from the graphic memory 45, expanded into the designated coordinate range XY on the corresponding base screen, and displayed.

When the display location of the switch-shaped part graphic 42 on the touch panel 30 is pressed, the processing instruction word WT for the touch panel 30 is searched and the range including the corresponding coordinates from the designated coordinates made through the touch panel 30. It is determined whether or not there is a processing instruction word WT that has as the coordinate information.

For example, when one point within the coordinate range X / Y is pressed, the processing instruction word WT1 constructed as described above.
3B, the PLC 19 is written by writing data at the corresponding address A in the PLC 19 and inverting the data value from “0” to “1”.
Control is performed to turn on the corresponding switch contact. At the same time, the processing instruction word WL1 reads the data of the reference address A and determines that it has changed to "1". Then, the graphic data FL2 corresponding to the ON state of the switch
Is read from the graphic memory 45 and displayed on the corresponding coordinate range XY, the switch-shaped part graphic 42 displayed on the base screen is also changed from the off state to the on state.

In this embodiment, one or a plurality of programmable display devices 22 and a host computer 46 are further provided.
In between, a general-purpose communication adapter 47 such as Ethernet
And a LAN connection via a common communication line 48 composed of a communication cable.

Therefore, the programmable display device 22 and the host computer 46, which are connected to each other via the common communication line 48, exchange various data with each other using a common communication protocol as described in detail later. It is possible.

Further, even when the data communication protocol is dedicated to each PLC and is different for each PLC 19, the state data MD corresponding to the control state in the PLC 19 is started between the plurality of types of PLCs 19 and between the PLC 19 and the host computer 46. It is characterized in that various types of data can be transferred via the programmable display device 22.

That is, as shown in FIG. 5, the host computer 46 performs predetermined data processing and displays the processing result on the screen, while the data to be transmitted uses a common protocol via a common communication line 48. Sent out.

On the other hand, the PLC 19 performs input / output operation of various signals with the device 21 of the controlled system in the target system 20 according to a preset program, and
Data having contents corresponding to the control state is specified and stored in the state data memory 44 set in the memory unit 24 as shown in FIG.

The updated status data MD is displayed on the display device 2.
In response to a data read request from the second side, the data is sent from the PLC 19 side to the display device 22 side via the PLC dedicated communication line 39 using a dedicated protocol specific to the model. Further, in response to a data write request from the display device 22 side, a dedicated communication line 3 using a dedicated protocol is used.
When data for changing the state data MD in the PLC 19 is input through 9, the control operation for the controlled device 21 corresponding to the data change is performed.

The present invention has the above-described structure, and further, TCP / IP is provided between the programmable display device 22 connected through the common communication line 48 and all data processing devices including the host computer 46. Data is transferred in the common data transfer format 49 illustrated in FIG.

On the other hand, the display device 22 and the PLC 19
Between Fig. 7 and Fig. 7 specified by the communication protocol peculiar to the model.
Information is transferred by the data 50 created based on the dedicated data transfer format as illustrated in (a).

Here, the common data transfer format 49
6A, as illustrated in FIG. 6A, a process ID to be processed in the programmable display device 22, an address that identifies the source of the data, and an address that identifies the destination of the data.
An example including the first data defining the data processing content specified by the above-mentioned processing ID in detail is shown, but this is an example, and if it can be commonly used, its format is Of course, it can be set arbitrarily.

In the present embodiment, as the data processing contents requested from the host computer 46 to the programmable display device 22, data access to the internal memory 52, screen processing operation in the display device 22, and P
Data communication with the LC 19 is specified. Therefore, the specific processing content and the content I is uniquely specified.
A D-code correspondence table is provided, and specific ID designation is performed according to the correspondence table, and a device as a data transfer target is specified by a source address and a destination address.

Next, the format of the above-described first data specifically specifies the processing content specified by the processing ID, as illustrated in FIG. 6B, and is specified by the ID. Process content ID required when the content is executed
And a command ID that represents the command in a generalized intermediate code, a device address indicating a specific access destination, and second data.

The processing content ID is, for example, if the content to be processed is data transfer with the PLC 19, whether the communication is data communication between the display device 22 and the PLC 19 in a one-to-n relationship. An ID code that specifies whether data communication is performed in the relationship of 1, and reference data related to the processing content such as a preset station number are set in the connected PLC 19.

Next, there are plural types of command IDs, P.
In the communication protocol for LC, the command for specifying the processing content common to each protocol is an intermediate code with the same code number as illustrated in FIG. The conversion table 15 for comparison is provided as a database.

The device address is for specifying a specific device set in the state data memory 44 of the PLC 19, and a specific address or device name for reading or writing data is designated. Further, as the second data, the data to be actually written in writing the data, and the information to specify the data to be read / written such as the read size in reading the data are written.

For each data sent using the common data format by the common protocol described above, each PL
In general, the communication protocol defined by the C maker is forcibly used by previously specifying not only the command system but also the data contents included in the data transfer format and the delivery information, or the arrangement order thereof. is there.

Therefore, the data transfer format defined by each dedicated communication protocol is, for example, as shown in FIG.
In the case of such a format, the format of the skeleton state in which the data portion to be actually transferred is undecided is extracted and held as the format information 16 as shown in FIG. 7B.

Further, the conversion table 15 illustrated in FIG. 7C, which is a pair of the intermediate code used in the above-mentioned common communication protocol and the command peculiar to each model, is formed and the above-mentioned data transfer format information 16 is formed. The display device 22 is used as a set and sets as protocol information 51 for each communication protocol.
By providing the internal memory 52 in the internal memory 52, the data communication by the protocol depending on the model of the connected PLC can be performed only by switching the protocol information 51 depending on the model and applying specific data thereto. .

Therefore, at the time of initial setting of the display device 22 or when the connected PLC 19 is changed, the communication protocol information 51 corresponding to the PLC 19 that may be connected to itself is stored in, for example, the host computer 46. It is selected from a protocol database and downloaded onto memory using a common communication protocol via a common communication line 48.

Instead of or in addition to downloading the dedicated communication protocol information 51 from the host computer 46 as described above, a means for reading / writing data from / to the memory card is provided to download from the memory card, or display screen. It is also possible to download from the loader at an appropriate time such as when creating the
Pre-fix multiple types of communication protocols in 5,
You can also select the required communication protocol.

With the above-mentioned configuration, when the display device 22 is started in step ST1 in the flow chart shown in FIG. 8, a predetermined initialization operation is performed in step ST2, and then a data receiving process starting from step ST3 is started. .

First, in step ST3, it is determined whether or not there is data input through the common communication line 48. If there is no data input, the process proceeds to step ST4 and there is no data input through the dedicated communication line 39. If it is determined that there is no data input from the dedicated communication line 39, the process returns to step ST3 to wait for new data input.

If it is determined in step ST3 that the data input through the common communication line 48 is determined, the process proceeds to step ST5 to check whether or not the data is for itself.
If it is determined that the data is not self-applied, the process returns to step ST3 and waits for the next data input.

However, when the own data is taken out in step ST5, the format of this data is defined by the common data transfer format 49 illustrated in FIG. 6, so that the process at the beginning of the data received in step ST6 is performed. The ID is determined, and the data processing operation according to the content is started.

For example, if the process ID is related to the screen process, the process proceeds to step ST7 where the image transfer task process operation is performed, and the process ID such as the transfer of the image data using the process instruction word and the screen rewriting process is performed in advance. The data processing operation of the content defined in 1. is performed. If the process ID is related to the internal process, the necessary data process such as writing or reading the designated data to the internal memory 52 is performed in step ST8.

If it is determined in step ST6 that the data communication operation with the PLC 19 is defined by the process ID determination, the process proceeds to step ST9 and the PLC 19 to be the communication partner is determined from the value of the destination address. . That is, as shown in FIG. 10A, the destination address, its communication port number, and the type of communication protocol used in the PLC 19 connected to the communication port 40 are preliminarily tabulated, and this table is used for communication. The protocol is selected in step ST10.

After that, from the contents of the first data shown in FIG. 6B, the format information 16 of the selected communication protocol and the conversion table 15, the communication protocol used in the PLC 19 for data communication is adapted. Format command data is created (Step 1
1), the command data is sent to the corresponding PLC 19 in step ST12.

On the other hand, in step ST4, the buffer memory provided for each communication port 40 is sequentially examined for a change in the data content, and if a communication port having a content change is found, the process proceeds to step ST13 and the data is loaded. Identify the communication partner from the port number. Further, in step ST14, the communication protocol used is checked using the table of FIG. 10A, and from the format information 16 and the conversion table 15 corresponding to the communication protocol, the common data transfer format using the intermediate code is used. After conversion according to 49, step ST
At 15, predetermined data processing such as data transmission to the host computer 46 via the common communication line 48 is performed.

In the above-described embodiment, the case where the number of PLCs 19 connected to the programmable display device 22 and the type of protocol are known and not changed before starting the device is illustrated. However, as shown in the flow chart of FIG. 9, the PLC 1 can be changed by arbitrarily changing the number or types of PLCs 19 connected during operation.
It is possible to perform data communication from the host computer 46 side to the PLC 19 without worrying about the connection state on the 9 side. Therefore, according to FIG. 9, the connected P
A method for automatically determining the communication protocol used in LC will be further described.

In the following description, the PLC that may be connected to the programmable display device 22 has four communication protocols "A, A2, B, C" which are dedicated to the manufacturer and model. It is assumed that there are types, but it goes without saying that the number and types can be appropriately increased or decreased.

When the system is started in step ST21 of the flow chart shown in FIG. 9, the communication protocol selection process starts from step ST22. In such a process, first, in step ST22, a command such as "00" that is set in advance for protocol determination is sent from the display device 22 side to the PLC 19.

Here, the command for protocol discrimination is selected from those which can obtain different response data as much as possible corresponding to the difference in communication protocol.
Response codes are listed up in advance for all the protocols applied as shown in FIG.

Further, the protocol "A-A" in the illustrated example
When the same response code is returned as in "2", another determination command "01" is set and the command shown in FIG.
Create a similar correspondence table such as.

In step ST23, when the reply from the PLC 19 side is not confirmed, it is determined that the data communication itself with the PLC 19 is not established. Therefore, if it is determined in step ST24 that all the protocols have been checked, it is determined that the PLC 19 is not connected to the communication port 40, or that the communication protocol is other than the prepared communication protocol, and the step S
The process moves to T25 to end the determination operation. On the other hand, step S
If the next protocol exists at T24, the protocol to be applied is changed at step ST26, and then the process returns to step ST22 to repeat the above-described processing operation.

When the reply from the PLC 19 side is confirmed in step ST23, the process moves to step ST27 and the response code is associated with the table of FIG. 10 (b) to discriminate the protocol. For example, when the response code is "20", the communication protocol is "B", and when it is "30", it can be determined that the protocol is "C". Therefore, in step ST28, the communication port 40 and the communication protocol are determined. After updating the correspondence table illustrated in FIG. 10 (a) that correlates with the above and determining the communication protocol to be used, the normal data processing operation in step ST30 is continued.

However, when the response code confirmed in step ST27 is "10", the communication protocol may be "A or A2" and cannot be determined. Therefore, the process proceeds to step ST31, and the determination command is changed to “01” illustrated in FIG. 10C, and the same determination operation is performed. In this case, the response code is "0
If it is “1”, the protocol is “A”, and if it is “02”, the protocol can be specified as “A2”. Otherwise, it is determined as an unsupported communication protocol.

Further, when a communication error occurs in step ST29 during the steady data processing, it is presumed that there is a change operation such as replacement of the PLC 19 connected to the display device 22. .
In such a case, the operation is stopped by returning to the above-mentioned communication protocol determination step from step ST22 and automatically setting the communication protocol suitable for the PLC 19 in the table of FIG. 10 (a). In this state, the communication protocol setting operation is completed in real time without the need for a manual initial setting operation.

The display device 22 includes various data input / output means such as a video camera in addition to the PLC 19.
Various kinds of data such as video data can be transmitted via the display device 22 and the common communication line 48.

Furthermore, assuming that the type of PLC 19 to be accessed is specified, the case where data is read / written by designating an address unique to the PLC 19 has been exemplified, but the address is also common to all PLCs 19. By setting the address display in advance and preparing the conversion table with the address display by the expression unique to each model, it becomes possible to create a program without considering the type of PLC 19 to be accessed at all Sex is further improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram schematically showing a basic configuration of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of a PLC and a programmable display device.

FIG. 3 is an explanatory diagram showing an example of a control operation using a processing instruction word.

FIG. 4 is an explanatory diagram showing a structure of a processing instruction word.

FIG. 5 is an explanatory diagram showing a data transmission procedure via a display device.

FIG. 6 is an explanatory diagram showing an example of a data transfer format used in a common communication protocol.

FIG. 7 is an explanatory diagram showing an example of a data transfer format and a conversion table used in a dedicated communication protocol.

FIG. 8 is a flowchart showing a data transfer process.

FIG. 9 is a flowchart showing a communication protocol determination process.

FIG. 10 is an explanatory diagram illustrating the relationship between communication protocols and response codes.

[Explanation of symbols]

10 First data processing means 11 Second data processing means 12 Common interface means 13 Dedicated interface means 14 Protocol conversion means 15 conversion table 16 format information 17 Display means 18 memory means 19 PLC 20 Target system 21 Controlled device 22 Programmable display device (data processing device) 23 CPU unit 24 memory units 25 input unit 26 Output unit 27 Computer Link Unit 28 display 29 screens 30 touch panel 31 Display control circuit 32 Touch panel controller 33 bus lines 34 CPU 35 ROM 36 RAM 37 Graphic controller 38 Communication Controller 39 dedicated communication line 40 communication ports 41 static figure 42 parts graphics 43 Event data memory 44 Status data memory 45 graphics memory 46 Host computer 47 Communication adapter 48 common communication lines 49 Common data transfer format 50 dedicated data transfer format 51 Protocol information 52 internal memory

Continuation of front page (56) Reference JP-A-5-265952 (JP, A) JP-A-10-254513 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04L 29 / 06 G06F 13/00 H04L 12/28 G06F 15/00

Claims (2)

(57) [Claims] 1. A first data processing means (10) for exchanging data by a communication protocol specific to the model and a second data processing means (11) for exchanging data by a common communication protocol. A common interface means (12) connected to the second data processing means (11) for exchanging data by a common communication protocol, and a plurality of communication ports, and the communication protocols are different from each other. > A plurality of the first data processing means (10) individually
With the connectable to the communication port, the individual first data processing means to perform data communication (10)
Dedicated interface means (13) that enables data to be exchanged by a corresponding dedicated communication protocol for each
When, a programmable display device wherein the between the common interface means (12) and a dedicated interface means (13), a protocol converter 60 for converting a communication protocol (14), said first One
Table corresponding to control states in the data processing means (10)
Display means (17) capable of displaying and data storage operation
And a memory means (18) that enables the data processing, and between the common interface means (12) and the second data processing means (11) is an intermediate code that does not depend on the model of the content to be processed. passing common commands are performed in a common data format representation, put on the display unit (17) and memory means (18)
Transfer of the data to be transferred is performed using the common command described above.
Further, in the protocol conversion means (14), the common command and a dedicated command used in the first data processing means (11) which may be connected to the dedicated interface means (13). And a dedicated command format that includes conversion data for exchanging data with a specific first data processing means (10) connected to the dedicated interface means (13), and the common interface means ( between receiving the common command format to be passed between any of the second data processing means connected to the 12) (11), programmable display device being characterized in that to allow the interconversion of command . 2.The first data processing means (10) is P
LC, The second data processing means (11) is a personal computer device.
I mean Received via said common interface means (12)
In the data passed, A code for specifying screen processing in the display means (17).
And Specify memory access to said memory means (18)
Code to Data between the first data processing means (10)
And a code for specifying the data communication process, The code specifying the data communication process is the second data process.
From the processing means (11) to the specific first data processing means (1
0) to the protocol conversion means (1).
In 4), it is used by the corresponding first data processing means (10).
Converted using the conversion data to the dedicated code used
Then, through the dedicated interface means (13)
Data transmission operation is performed According to claim 1.Program table
Indicationapparatus.