Patent ID: 9684287
Date: 2017-06-20
CPC Classifications: G05B,H02J,Y02B,Y04S

Claim:
1. A controlling device comprising: a manipulated variable limit value memory that stores a first manipulated variable limit value that is one of a manipulated variable lower limit value or a manipulated variable upper limit value that can be set arbitrarily through communication; a normal limit value memory that stores a second manipulated variable limit value that is a normal value for the first manipulated variable limit value; a processor that calculates a manipulated variable (MV); the processor performs at least one of an upper limit limiting process limiting the manipulated variable (MV) to a value that is no more than a manipulated variable upper limit value indicated by the first manipulated variable limit value, the manipulated variable (MV), calculated by the processor, and a lower limit limiting process limiting, to a value that is no less than a manipulated variable lower limit value that is indicated by the first manipulated variable limit value; a signal output outputs to the control subject the manipulated variable MV that has been subjected to the limiting process; a specified time interval memory that stores a specified time interval (TR), wherein the specified time interval memory stores, as a new specified time interval (TR), a specified time interval that has been transmitted, when a specified time interval to be set is transmitted simultaneously with the transmission of a first manipulated variable limit value that is to be set, from the higher-level device; an elapsed time clock that measures time that has elapsed after the first manipulated variable limit value has been updated through communication from the higher-level device; and an automatic reset that causes the second manipulated variable limit value, which is stored in the normal limit value memory, to be stored in the manipulated variable limit value memory as a new first manipulated variable limit value when the elapsed time reaches the specified time interval (TR), wherein the signal output regulates an amount of electric power used by a lower-level device.