| 摘要 |
PURPOSE:To control a load power from a remote location and also to attain inexpensive controller by providing a setting means for setting the direction of a current flowing to two lines in response to an output of an input means and a detecting means for detecting the direction of a current flowing to the two lines and giving the information to a phase control means. CONSTITUTION:Preset data for a trigger phase angle of a triac 64 controlling the current of a load L is stored in a memory 68 of an operating section B6. When data is inputted to a CPU67, the CPU67 turns on momentarily a transistor (Tr) 62 via an IO port 66. The Tr62 is turned on momentarily because the trigger phase angle of the triac 64 controlling the phase of the load L6 is to be detected. A pulse as shown in the figure 3 is generated at a connecting point (a) between a resistor 63 and a collector of a photo Tr65b. It is detected how a phase control section 63 sets the trigger phase angle of the triac 64 at present by detecting the high level time of the signal at the connecting point (a). |
