| 摘要 |
PURPOSE:To bring display in a transient state where welding output changes remarkably close to a degree of change of a real value with a short period and to display it by inputting a set value change delay signal to an arithmetic circuit part with a delay time in case either of a voltage set value or a current set value is changed more than a prescribed value. CONSTITUTION:A voltage value signal and a current value signal are inputted to a set value change detecting circuit part 16 and the set value change delay signal is outputted to the arithmetic circuit part 15. When the set value change delay signal is at a H level, the voltage value signal and the current value signal are sampled (n) times [(n) is an integral number >=1] respectively and averaged and when the set value change delay signal is at a L level, the inputs are sampled (m) times [(m) is an integral number larger than (n)] respectively and averaged and a voltage average value signal and a current average value signal are outputted to a display circuit part 14. In this way, the welding voltage and current can be displayed close to the degree of change of the real value with the short period in the transient state where the set value of the voltage or the current is changed and the welding output is remarkably changed.
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