Process control system
First Claim
1. A process control system comprised of a control unit that executes control computations using a normalized signal as an input value, and a monitoring unit that communicates with the control unit via a control bus, and converts to a physical unit value scale and displays the operation value obtained from the control unit using a normalized signal as an input value;
- wherein within the control unit are disposed an input data storage means that associates and stores the input value and engineering unit value scale data, and an operation means that inputs and computes the structuralized data of the input data storage means;
wherein the operation means supplies this operation value and engineering unit value scale data to the display means of the monitoring unit.
1 Assignment
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Accused Products
Abstract
The present invention has the following characteristics.
The process input signal input value and engineering unit value scale data are associated and stored inside the control unit. The operation value determined from the input value and the engineering unit value scale data are sent from the control unit to the monitoring unit. Accordingly, the control unit and monitoring unit do not hold separate engineering unit value scale data, so the engineering unit value scale data can be centrally managed.
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Citations
12 Claims
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1. A process control system comprised of a control unit that executes control computations using a normalized signal as an input value, and a monitoring unit that communicates with the control unit via a control bus, and converts to a physical unit value scale and displays the operation value obtained from the control unit using a normalized signal as an input value;
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wherein within the control unit are disposed an input data storage means that associates and stores the input value and engineering unit value scale data, and an operation means that inputs and computes the structuralized data of the input data storage means;
wherein the operation means supplies this operation value and engineering unit value scale data to the display means of the monitoring unit. - View Dependent Claims (2, 3)
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4. A process control system having an input output unit, and comprising, in an input output unit that directs I/O data passing through I/O modules to the control logic that handles these data:
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a label definition means that defines variables handled by the control logic using label names;
I/O modules, which are disposed in a number equal to the I/O points, and which input and output I/O data;
and a correspondence table, which provides correspondences between mount positions specifying the I/O modules, and the label names;
wherein the data input and output from the I/O modules are connected to the control logic which corresponds, based on the correspondence table. - View Dependent Claims (5)
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6. A process control system having an input output unit, and comprising:
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a control logic generating unit comprising a control logic generating means that creates the control logic used by the control application, and a label definition means that defines the variables handled by this control logic using label names;
a control unit comprising a control application execution means, which is generated by downloading the data of the control logic generation means; and
a correspondence table, which is generated by downloading the data of the label definition means, and which provides correspondences between mount positions specifying the I/O modules, and the label names;
a table maintenance unit that maintains the correspondences between label names and mount positions in the correspondence table;
and a process input output unit that comprises input and output modules for inputting and outputting data;
wherein the data input and output from the process input output unit are connected to the control logic that corresponds based on the correspondence table. - View Dependent Claims (7)
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8. A process control system having an input generating means, which is applied to a control unit comprising a PLC means, whose functions are defined by software and which executes a control application;
- an input interface means that interfaces a signal from a real process to the PLC means 71; and
an output interface means that interfaces a signal from the PLC means to a real process;
wherein the system comprises a pseudo input generating means, whose functions are defined by software and which generates a simulated input signal based on a signal from the output interface means;
and a real input pseudo input switching means, which, when a simulated input signal is used, supplies the pseudo input generating means with a signal from the output interface means, and supplies the input interface means with the output signal of the pseudo input generating means. - View Dependent Claims (9, 10, 11, 12)
- an input interface means that interfaces a signal from a real process to the PLC means 71; and
Specification