Controller and industrial machine

A controller that controls an industrial machine, comprising:

• a storage area that stores an operation program for operation of the industrial machine;
• a cache memory that stores the operation program read from the storage area;
• a cache control unit that controls writing into the cache memory and discarding;
• and
• an analysis unit that analyzes the operation program loaded in the cache memory,
• the analysis unit comprising:
• an operation load determining section that determines whether an operation load on a CPU in a command included in the operation program is below a prescribed value;
• a call checking section that pre-reads a command subsequent to the command included in the operation program loaded in the cache memory, and checks whether a subprogram call command is present, in a case where the operation load determining section determines that the operation load is below the prescribed value;
• a cache control command adding section that adds, to the command, a cache control command for loading of the subprogram into the cache memory in accordance with a predetermined condition, in a case where the call checking section confirms presence of the subprogram call command;
• and
• a cache control requesting section that makes a cache control request for the cache memory to the cache control unit, responsive to the cache control command added by the cache control command adding section,
• the cache control unit comprising a cache control request processing section that loads the subprogram in the cache memory, based on the cache control request by the cache control requesting section.