Title:
DIGITAL CONTROLLER
Document Type and Number:
Japanese Patent JPS59167703
Kind Code:
A
Abstract:
PURPOSE:To change automatically data in accordance with the state of a plant or the like by providing a means which changes numerical data in accordance with time elapse and holding the data change or initializing data on a basis of the status signal of a device to be controlled. CONSTITUTION:The means which changes numerical data in accordance with time elapse is provided, and the data change is held or data is initialized on a basis of the status signal of a device to be controlled. For example, a processing request or the like is reset if initialization of a time counting counter is required; but if it is not required, it is discriminated whether a processing is executed or not, and an initial value is set to a target value if no processing requests exist and the processing is not executed. If the processing is executed, a target value SV is calculated from an applied counter range to read data PV attained by converting the operation state of the plant to a numerical value. The absolute value of the difference between the target value SV and data PV is obtained, and it is discriminated whether this value exceeds an interruption limit value or not, and a counter interruption processing is executed if it exceeds the limit value; but a counting-up processing or the like is executed if it does not exceed.
Inventors:
KOMORI SHIGERU
Application Number:
JP4038683A
Publication Date:
September 21, 1984
Filing Date:
March 11, 1983
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G05B11/36; G05B15/02; (IPC1-7): G05B11/36
Attorney, Agent or Firm:
Shinichi Kusano