JPH1021206A - Programmable controller system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a processing from calculation to an output by adding each data with a flag showing whether the piece of data belongs to its own device, transmitting it and allowing an output device receiving information to select output data according to the flag to output outside. SOLUTION: In order to inform an output device of data on an arithmetic result, a processor prepares a file mapped equivalently to a data buffer provided for the output device and stores the arithmetic result of its own device in it. Indefinite data is set to data corresponding to a part except for a valid flag. In addition the processor simultaneously prepares a flag validating the position of output data which its own data belongs to and prepares output data transmitting frame with a data part to inform the output device. The output device changes data in an output buffer with data given from the processor corresponding to the effective flag within the frame based on a logic indicated by an arithmetic part to make a new output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plurality of processor devices connected to one or more input devices and output devices via a network, and the plurality of processor devices are connected to the same output device. The present invention relates to a programmable controller system that stores output data in different address areas of an output buffer and then outputs the output data to the outside. More specifically, the present invention relates to an improvement in data writing from a plurality of processor devices to a common output device.

[0002]

2. Description of the Related Art Conventionally, there is a programmable controller system having a configuration shown in FIG. this is,
A plurality of processor devices 1a to 1n are respectively connected to one or more input devices 3a to 3i and output devices 4a to 4j via a network 2, and the plurality of processor devices 1a to 1n are connected to the same output device. The output data is stored in different address areas of the output buffer in the output buffer 4a and then output to the outside. In this system, when the operation results of the multiple processor units 1a to 1n are to be output to one output unit 4a, the data are collected in one processor unit, and the output data is collected in one buffer. , Only the processor device has output. For this reason, output data has not been simultaneously written from a plurality of processor devices to the same output device.

[0003]

As described above, conventionally, when it is desired to output the operation results of a plurality of processor devices to the same output device, it is necessary to communicate between the processor devices and collect data in one processor. However, it took time to output the operation result of the processor device for these processes. Further, since communication is performed between the processor devices, the processing becomes complicated, and the operation efficiency of the entire system may be impaired.

[0004]

In order to solve the above-mentioned problems, a first aspect of the present invention is to connect a plurality of processor devices, input devices, and output devices on the same network,
Each processor is a programmable controller system that collects data from an input device via a network and notifies an output device of a calculation result, wherein a plurality of processor devices have different address areas for an output buffer of the same output device. Is treated as an output data position to which each processor device belongs, each processor device transmits data in a format mapped to an output buffer of the output device when notifying the output data to the output device. Then, each data is transmitted with a flag indicating whether the data belongs to the own device or not, and the output device receiving the notification selects the output data from the transmission source processor according to the flag and outputs the data to the outside.

According to a second aspect of the present invention, when each processor notifies the output device of the output data, a flag indicating whether data exists in byte / word units is added in addition to a flag indicating valid data. , And the data corresponding to the byte / word valid flag and only the data valid flag are notified to the output device.

According to a third aspect of the present invention, before each processor device transmits output data, the data position to which the own device belongs on a flag table corresponding to the output buffer is made valid and notified to the corresponding output device. Then, each output device takes in its flag table. Thereafter, when each processor device notifies each output device of the output data of the calculation result, each output device outputs the output data from the corresponding processor to the outside according to the registered flag table.

According to a fourth aspect of the present invention, before each processor device transmits output data, it is determined whether or not data exists in a byte / word unit with a flag table indicating valid data for the corresponding output device. The flag indicating whether or not is notified at the same time. After that, each processor unit outputs the output data of the operation result as a byte / word indicating validity by a byte / word valid flag.
Only the words are collectively notified to each output device, and each output device outputs the output data from the corresponding processor to the outside according to the flag table while selecting data based on the registered byte / word valid flag.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, each output device checks whether or not there is a valid flag for the output data notified from the processor device. If the valid flag is not registered, the data is discarded and the processor device is notified of the discard.

According to a sixth aspect of the present invention, in the third or fourth aspect, the output device checks a flag table indicating valid data notified from each processor device and designates validity for the same data. It is determined whether or not there are a plurality of processor devices, and if they are overlapping, the processor device is notified that the positions of the output data are overlapping.

According to a seventh aspect of the present invention, in the third or fourth aspect, each output device is enabled to change a flag table indicating valid data notified from the processor device, and a new flag table is set. Update when sent.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the operation of the first embodiment according to the first aspect of the present invention. In this embodiment, the processor device creates a file mapped in the same manner as the data buffer of the output device in order to notify the output device of the data of the calculation result, and stores the calculation result of the own device in the file. . Here, indefinite data is set for data corresponding to places other than the valid flag. At the same time, it creates a flag for validating the corresponding output data position to which the own device belongs, creates an output data transmission frame as shown in FIG. 1 together with the data part, and notifies the output device.

The output device changes the data of the output buffer in accordance with the valid flag in the frame by the data notified from the processor device based on the logic as shown by the operation section, and makes a new output. That is, only the data with the valid flag is changed, and the data without the valid flag is used as the new output data without change. FIG.
Indicates that the output device of this embodiment has 32-bit data in the output buffer, and a certain processor device has one of them.
An example in the case where the 8th bit and the 25th, 26th, and 32nd bits are output data will be described.

FIG. 3 is an explanatory diagram showing the operation of the second embodiment according to the second aspect of the present invention. In this embodiment, the first
Regarding the output data transmission frame in the embodiment,
Further, a valid flag in a byte unit is provided in a bit unit. This flag indicates whether or not the following data is present in the frame in byte units in order.If this flag is in an invalid state, the byte data itself at the position corresponding to the flag is on the frame. Does not exist.

Accordingly, when the output device receives the output data transmission frame, the output device selects the data of its own output buffer on a byte basis based on the byte valid flag in the frame, and according to the valid flag in the frame and the update data. Update the contents of the output buffer. That is, as shown in FIG. 4, a certain output device has 32-bit output information, and a certain processor device for the output device has the first 1 to 8 bits and the 25th, 26th, and 32nd bits as output data. In the case, the first byte and 4
The byte is set valid, and the others are set invalid. The output device that has received this frame updates the output data in units of valid bytes, as in the first embodiment.

FIGS. 5 and 6 are explanatory views showing a third embodiment according to the third aspect of the present invention. In this embodiment, as shown in the figure, each processor device first sets a flag for validating the corresponding output data position of its own device with respect to all data of the output device to which the data output by the processor device belongs. A table is created, and the table is notified to a corresponding output device via a network. Each output device internally has a received flag table from each processor with its source address as a key. After that, each processor device notifies the corresponding output device of the calculation result. At this time, undefined data is sent for data that does not belong to the own device. Each output device that receives these data frames recognizes the address of the valid flag table from the source address in the frame, refers to the corresponding flag table, and outputs only valid data as in the first embodiment.

FIGS. 7 and 8 are explanatory views showing a fourth embodiment according to the fourth aspect of the present invention. This embodiment is different from the third embodiment in that the byte valid flag shown in the second embodiment is added to the flag table created by each processor device in the initial state. Therefore, when notifying the corresponding output device of the operation result, each processor device transmits only the data including its own output data in byte units. Each output device that receives these data frames recognizes the address of the valid flag table from the source address in the frame, and refers to the corresponding flag table to output only valid data as in the second embodiment.

FIG. 9 is an explanatory view showing a fifth embodiment according to the fifth aspect of the present invention. In the third and fourth embodiments, the output device receives the data frame from the processor device, searches the flag table storage area from the source address in the frame, and determines whether the flag table of the transmission source / processor device exists. Check if. At this time, if the source address of the corresponding processor device does not exist, the data from the processor is discarded. At the same time, as shown in FIG. 9, a status frame to which a status indicating that the corresponding flag table does not exist is created and notified to the transmission source processor device.

FIG. 10 is an explanatory view showing a sixth embodiment according to the sixth aspect of the present invention. In the third and fourth embodiments, when each output device is notified of the flag table from each processor device, each output device refers to a flag table already registered from another processor device, and the output device is redundantly enabled between the processor devices. Check if there is any data specified in. At this time, if there is data that is valid redundantly, information in which "1" is set at the position of the duplicate data corresponding to the mapping of the output buffer of the output device, for example, the duplicate data as shown in FIG. An information frame is created and notified to each of the two overlapping processors.

Next, a seventh embodiment according to the present invention will be described. In the third and fourth embodiments, each output device searches the flag table storage area when registering the flag table notified from the processor device, and determines whether the flag table of the transmission source processor has already been registered. Check if not. Here, if it has already been registered, the table is changed to a new table, and if it has not been registered, the table is newly added. Thus, when the processor device wants to change the effective bit pattern table, the change can be performed only by notifying the output device of the new table. In the second embodiment and the fourth embodiment, the case where data is transmitted in byte units has been described. However, the present invention can be similarly applied to the case where data is transmitted in word units.

[0020]

As described above, according to the present invention, when calculation results of a plurality of processor devices are to be output to one output device, the output device to which the own device is to notify output data is output. It is possible to notify the corresponding output device of the calculation result of the own device without being conscious of whether or not the output device is also notified of the output data from another processor device. As a result, there is no need for a communication protocol for matching output data between the processor devices, and processing from calculation to output of the processor device is simplified.
Further, since the communication between the processor devices for collecting the output data in one processor device, which has been conventionally performed, is not required, the operation efficiency of the entire system can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an operation of a first embodiment according to the first aspect of the present invention.

FIG. 2 is an explanatory diagram showing a specific example of the first embodiment.

FIG. 3 is an explanatory diagram showing an operation of a second embodiment according to the invention of claim 2;

FIG. 4 is an explanatory diagram showing a specific example of the second embodiment.

FIG. 5 is an explanatory diagram showing the operation of the third embodiment according to the third aspect of the present invention.

FIG. 6 is an explanatory diagram showing the operation of the third embodiment.

FIG. 7 is an explanatory diagram showing an operation of a fourth embodiment according to the invention of claim 4;

FIG. 8 is an explanatory diagram showing the operation of the fourth embodiment.

FIG. 9 is a diagram showing a status frame used in the fifth embodiment according to the fifth aspect of the present invention.

FIG. 10 is a diagram showing a status frame used in the sixth embodiment according to the sixth invention.

FIG. 11 is a diagram showing a configuration of a programmable controller system to which the present invention is applied.

[Explanation of symbols]

 1a-1n Processor device 2 Network 3a-3i Input device 4a-4j Output device

Claims (7)

[Claims] A plurality of processor devices are connected to one or more input devices and output devices via a network, respectively, and the plurality of processor devices are arranged in different address areas of an output buffer in the same output device. When each processor device sends output data to an output device, the format of the output data is the same as the format of the output buffer in the destination output device. Means for adding to the output data a flag indicating whether each output data belongs to its own device in bit units and transmitting the output data to the output device, and the output device having received the output data from the processor device. Sometimes, the output buffer in its own device based on the flag in the received data Programmable controller system comprising: the means for updating only the data of the corresponding region. 2. A plurality of processor devices are connected to one or more input devices and output devices via a network, respectively, and the plurality of processor devices are arranged in different address areas of an output buffer in the same output device. When each processor device sends output data to an output device, the format of the output data is the same as the format of the output buffer in the destination output device. Maps to
A flag indicating whether each output data belongs to the own device in bits and a flag indicating whether each data belongs to the own device in bytes or words are added to the output data. Means for transmitting data belonging to the own device in units of bytes or words to the output device based on the display of the flag, and, when the output device receives the output data from the processor device, automatically outputting the data based on the flag in the received data. Means for updating only data in a corresponding area of an output buffer in the device, a programmable controller system comprising: 3. A plurality of processor devices are connected to one or more input devices and output devices via a network, respectively, and the plurality of processor devices are connected to different address areas of an output buffer in the same output device. In a programmable controller system that stores output data in an external device and then outputs it to the outside, at the time of system construction, each processor device indicates to the output device of the data transmission destination whether or not the data to be transmitted belongs to its own device in bit units Means for creating and transmitting a flag table to be executed, means for storing the flag table in the output device when the output device receives the flag table from the processor device, and means for storing the flag table in the output device. When the output data is sent to the output device, the output buffer in the destination output device Means for mapping the output data to a format equivalent to that of the output device and transmitting the output data to the output device; and when the output device receives the output data from the processor device, the output buffer in its own device based on a previously stored flag table. Means for updating only data in a corresponding area of the programmable controller system. 4. A plurality of processor devices are respectively connected to one or more input devices and output devices via a network, and the plurality of processor devices are arranged in different address areas of an output buffer in the same output device. In a programmable controller system that stores output data in an external device and then outputs it to the outside, at the time of system construction, each processor device indicates to the output device of the data transmission destination whether or not the data to be transmitted belongs to its own device in bit units Means for creating and transmitting a flag table consisting of a flag to indicate and whether each data belongs to the own device in units of bytes or words, and a means for transmitting the flag table when the output device receives the flag table from the processor device. Means for storing the flag table in the output device, and When each processor device transmits output data to the output device, the processor maps the output data into a format equivalent to the output buffer in the output device of the transmission destination and belongs to its own device based on the display of the created flag table. Means for transmitting data to the output device in byte or word units; and when the output device receives output data from the processor device, a corresponding area of the output buffer in its own device based on a previously stored flag table. Means for updating only the data of the programmable controller. 5. The programmable controller system according to claim 3, wherein when output data transmitted by each processor device is received by the output device, a reference is made to a flag table, and all the output data is transmitted to its own device. If not, the programmable controller system comprises means for discarding the received data and notifying the transmitting processor device that the data has been discarded. 6. The programmable controller system according to claim 3, wherein when the flag table transmitted by each processor device is received by the output device, the flag table of another processor device already stored is referred to. However, if the output data overlaps with the output data of another processor and specifies the same address area of the output buffer, both processors are notified of the overlap and the duplicate position information is A programmable controller system comprising a transmitting unit. 7. The programmable controller system according to claim 3, wherein when the flag table transmitted by each processor device is received by the output device, whether the flag table of the source processor device is already stored. Means for determining whether or not the flag table of the source processor device has been stored, means for storing and updating a newly received flag table, and a flag table for the source processor device. A means for storing the received flag table if not present, comprising: