A simulation system includes a control device for controlling a control object; and an information processing device configured to exchange data with the control device. The control device includes a computation unit configured to execute sequence control and motion control of the control object; and an output unit configured to output a fixed interval of data related to the sequence control and the motion control of the object. The information processing device includes a storage module configured to store design data representing at least a portion of the configuration of the control object; and a visualization module configured to present a visual representation of the behavior of the control object around a period in time that satisfies a predetermined criteria using the fixed interval of data output from the control device, and the design data, where the fixed interval of data from the control device the visualization module uses is the fixed interval of data over a predetermined period that includes the period in time.