Control device and control method with various command values in a shared memory providing access to various program execution and command value operation parts in each control cycle

A control device, controlling a control target, comprising:

• a data update part, updating input data and output data in each control cycle;
• a first program execution part, scanning an entire first program in each control cycle to update a first command value;
• a second program execution part, updating a second command value in each control cycle according to a sequentially interpreted second program;
• and
• a shared memory, storing the command values respectively updated by the first and the second program execution parts,
• wherein the second program execution part comprises:
• an interpreter, interpreting at least part of the second program to generate an intermediate code;
• and
• a command value operation part, calculating the second command value in each control cycle according to the intermediate code generated by the interpreter,
• wherein the command value operation part outputs the second command value in each control cycle in a manner which the second command value can be used in other processes, and through the shared memory, the first program execution part refers to the second command value calculated by the second command value operation part in each control cycle.