| 摘要 |
A programmable controller includes for controlling a system including a program memory unit for storing a group of sequence instructions including an instruction part and operand part, a data memory unit for storing a plurality of system data, a sequence execution control unit for executing sequence computations based on instructions fetched from the program memory unit and the system data from the data memory unit, and a holding register unit for holding the operand part as address part of the system data when the sequence execution control unit fetches the instruction from the program memory.
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