US 5,761,520 A · Data processing method

Abstract

A data processing method which makes it unnecessary to run a user application program describing detailed conditions under which data on a device having a memory are acquired each time a system is started. A main controller forms a text format file as a data acquisition condition for a PLC from which data is to be acquired so that the data acquisition condition is associated with a label name, the data acquisition condition including a supervisory interval for supervising the status of the PLC and the operation status of the PLC for setting a trigger condition for starting data acquisition. When receiving the label name and the corresponding data acquisition condition from the main controller, a subcontroller develops and stores is the received data acquisition condition in a memory so that the data acquisition condition is associated with the label name. When receiving only the label name from the main controller, the subcontroller compares the data acquisition condition that is developed and stored in the memory with data of the PLC, acquires data from the PLC when the data acquisition condition is satisfied, and transfers the acquired data to the main controller.

Claims8

Dependent claims

A data processing method performed with a main controller and a subcontroller, comprising:

the main controller determining, in the form of a text format, a data acquisition condition for a particular subject device from which data is to be acquired, whereby the data acquisition condition is associated with a label name, wherein the data acquisition condition includes a supervisory interval for supervising statuses of the particular subject device and of a plurality of subject devices related thereto and operation statuses of the particular subject device and the plurality of subject devices for setting a trigger condition for starting data acquisition;
and
the subcontroller, upon receiving the label name and the corresponding data acquisition condition from the main controller, developing and storing the received data acquisition condition in a memory so that the data acquisition condition is associated with the label name;
and
the subcontroller, upon receiving only the label name from the main controller, comparing a previously developed and stored data acquisition condition, developed and stored in the memory, with data from the particular subject device and the plurality of subject devices, and acquiring data from the particular subject device when the previously developed and stored data acquisition condition is satisfied;
and
the subcontroller transferring the acquired data to the main controller.

4 more elements

A data processing method performed in a system including a plurality of main controllers and a subcontroller, wherein each of the plurality of the main controllers has an identifier to be used for discrimination from the other main controllers, and forms, in the form of a text format, a data acquisition condition for a particular subject device from which data is to be acquired, whereby the data acquisition condition is associated with a label name, the data acquisition condition including a supervisory interval for supervising statuses of the particular subject device and a plurality of subject devices related thereto and operation statuses of the particular subject device and the plurality of subject devices, the method comprising:

is one of the plurality of main controllers setting a trigger condition for starting data acquisition;
and
the subcontroller, upon receiving the label name and the corresponding data acquisition condition from said one of the plurality of main controllers, developing and storing the received data acquisition condition in a memory so that the data acquisition condition is associated with the label name;
the subcontroller, upon receiving only the identifier and the label name from said one of the plurality of main controllers, comparing a data acquisition condition previously developed and stored in the memory with data of the particular subject device and the plurality of subject devices, and acquiring data from the particular subject device when the previously developed and stored data acquisition condition is satisfied;
the subcontroller temporarily storing the acquired data in a memory so that the acquired data is associated with the label name and the identifier;
the subcontroller comparing an identifier corresponding to the acquired data with identifiers of the plurality of main controllers requesting data transfer;
and
the subcontroller transferring the data corresponding to the label name having a coincidence-found identifier to the main controller having the coincidence-found identifier in accordance with an amount of the data.

5 more elements

Dependencies are inferred from the claim text.

Data processing method

Life of this patent

Data processing method

Life of this patent

Abstract

Claims8