Servo system controller

A servo system controller comprising:

• a sequence controlling section comprising a device memory in which device information including output information, internal information, and input information indicating a state of a controlled object is stored, and a control memory for storing a sequence program in which variables indicating storing areas of the device information are described, wherein the controlled object is controlled via the output information by repeating an operation for updating the input information and an operation for updating the output information or the internal information based on the sequence program;
• a positioning controlling section which accesses the device memory and executes a positioning control program based on a command from the sequence controlling section to output a predetermined position command, the positioning controlling section comprising a comparing process table memory in which the device information and range information are set previously in response to a plurality of output units respectively, wherein the positioning controlling section determines whether the device information is within a range indicated by the range information, and performs a process for outputting a decision result to the output units by referring to the comparing process table memory;
• and
• a servo controller for executing servo driving control of a predetermined motor based on the predetermined position command.