I/o device, programmable logic controller, and operation method

A programmable logic controller comprising a CPU (Central Processing Unit) device and a plurality of I/O (Input/Output) devices, each of the plurality of I/O devices comprising:

• an interface unit which communicates with the CPU device and also communicates with the other I/O devices, the interface unit receiving from each of the other I/O devices input information input to the other I/O device and output information output from the other I/O device;
• a parameter unit which stores methods of a plurality of operation processing and a parameter indicating an extraction condition for extracting operation data to be used for the operation processing;
• an operation data extraction unit which inputs the input information and the output information of each of the other I/O devices received by the interface unit and also inputs input information input into the own I/O device and output information output from the own I/O device, extracts the operation data from each of the input information and the output information of the other I/O devices which have been input and the input information and the output information of the own I/O device which have been input, according to the parameter stored in the parameter unit;
• and
• an operation unit which executes the plurality of operation processing in parallel, by using the operation data extracted by the operation data extraction unit and according to the methods of the plurality of operation processing stored in the parameter unit.

An operation method by an I/O device to be used in a programmable logic controller comprising a CPU (Central Processing Unit) device and a plurality of the I/O devices, the operation method comprising:

• by an interface unit which communicates with the CPU device and also communicates with the other I/O devices, receiving from each of the other I/O devices input information input to the other I/O device and output information output from the other I/O device;
• by a parameter unit, storing methods of a plurality of operation processing and a parameter indicating an extraction condition for extracting operation data to be used for the operation processing;
• by an operation data extraction unit, inputting the input information and the output information of each of the other I/O devices received by the interface unit and also inputting input information input into the own I/O device and output information output from the own I/O device, extracting the operation data from each of the input information and the output information of the other I/O devices which have been input and the input information and the output information of the own I/O device which have been input, according to the parameter stored in the parameter unit, and outputting the extracted operation data;
• and
• by an operation unit, executing the plurality of operation processing in parallel, by using the operation data output by the operation data extraction unit and according to the methods of the plurality of operation processing stored in the parameter unit.

An I/O (Input/Output) device to be used in a programmable logic controller comprising a CPU (Central Processing Unit) device and a plurality of the I/O devices, the I/O device comprising:

• an interface unit which communicates with the CPU device and also communicates with the other I/O devices, the interface unit receiving from each of the other I/O devices input information of the other I/O device and output information of the other I/O device;
• a parameter unit which stores a method of operation processing, a parameter indicating an extraction condition for extracting operation data to be used for the operation processing, and output period information which specifies an output timing of outputting an operation result obtained by the operation processing and an output continuation period of the operation result obtained by the operation processing;
• an operation data extraction unit which inputs the input information and the output information of each of the other I/O devices received by the interface unit and also inputs input information input into the own I/O device and output information output from the own I/O device, extracts the operation data from each of the input information and the output information of the other I/O devices which have been input and the input information and the output information of the own I/O device which have been input, according to the parameter stored in the parameter unit, and outputs the extracted operation data;
• an operation unit which executes the operation processing, by using the operation data output by the operation data extraction unit and according to the method of the operation processing stored in the parameter unit;
• and
• an output period determination unit which inputs the operation result obtained by the operation processing executed by the operation unit and determines the output timing and the output continuation period of the input operation result according to the output period information stored in the parameter unit, and outputs the input operation result according to the determination.

An I/O (Input/Output) device to be used in a programmable logic controller comprising a plurality of the I/O devices, the I/O device comprising:

• an interface unit which communicates with the other I/O devices, the interface unit receiving from each of the other I/O devices input information input to the other I/O device and output information output from the other I/O device;
• a parameter unit which stores methods of a plurality of operation processing and a parameter indicating an extraction condition for extracting operation data to be used for the operation processing;
• an operation data extraction unit which inputs the input information and the output information of each of the other I/O devices received by the interface unit, extracts the operation data from each of the input information and the output information of the other I/O devices which have been obtained, according to the parameter stored in the parameter unit, and outputs the extracted operation data;
• and
• an operation unit which executes the plurality of operation processing, by using the operation data output by the operation data extraction unit and according to the methods of the plurality of operation processing stored in the parameter unit.