Programmable controller device

A programmable controller system comprising:

• a main body;
• one or more expansion units;
• and
• a bus line that connects said main body with said one or more expansion units;
• wherein said main body comprises:
• a programmable controller main body having a CPU unit and one or more I/O units connected by a bus line;
• and
• a power unit for supplying power to said programmable controller main body;
• wherein said CPU unit has a memory with a user access area for individual units which is accessible by a user command;
• wherein said power unit has status data generating means for generating status data related to said power unit;
• wherein each of said expansion units comprises:
• one or more expansion I/O units connected through a bus line;
• an expansion power unit for supplying power to said one or more expansion I/O units, said expansion power unit including additional status data generating means for generating status data related to said expansion power unit;
• wherein said programmable controller system further comprises a data transmission path between said CPU unit and said power unit and between said CPU unit and the expansion power units for transmitting status data generated by said status generating means and the additional status generating means to said user access area is provided between said CPU unit and said power unit.

A power unit for a programmable controller, said power unit comprising:

• a power input terminal for receiving power from outside;
• a transmission terminal for transmitting power to a programmable controller main body;
• an input circuit for rectifying an AC received from said power input terminal to convert into a DC and converting said DC back to an AC by switching;
• a transformer for transforming the AC received from said input circuit;
• an output circuit for rectifying and stabilizing the AC from said transformer to obtain a stabilized DC power source and transmitting said stabilized DC power source to a power transmitting route to said programmable controller main body through said transmission terminal;
• a status data generating means for generating status data related to said power unit;
• and
• transmitting means said status data generated by said status data generating means to a bus connected to said programmable controller.