| 摘要 |
PURPOSE:To achieve alarming with a buzzer or the like without any change, by erasing the internal storage every time a set value is changed and a measured value reaches the set value, through the provision of a set value arrival detection section, a set value arrival storage section, a set value change detecting section and a storage erasing section. CONSTITUTION:A heater such as an iron is provided with a set value arrival detecting section 65, a set value arrival storage section 66, alarm means 5 and 30, a set value change detecting section 70, and a storage erasing section 71. When a temperature of the heater reaches a lower or upper limit set value and a voltage relating the control of a load 4 (input 1) is changed, the signal is detected, the arrival is stored and informed, and if the set value is required to be changed, the change is detected and the said storage is erased. For example, when a temperature regulator is turned, a switch 7 is alternately switched interlocking with the turning, the change in the set value is detected by taking the output as an input 3 to erase the storage. |
