Servo system and servo system control method

A servo system comprising:

• a host apparatus;
• and a plurality of servo amplifiers, the host apparatus and the plurality of servo amplifiers transmitting and receiving a communication signal,
• each of the servo amplifiers including
• a servo computation unit configured to perform servo computation processing for each servo computation period,
• a communication unit configured to transmit and receive the communication signal,
• a storage unit configured to save servo computation information in the servo computation processing as history data, and
• a trigger processor configured to set, in advance, a save stop condition for stopping saving the history data, determine, for each servo computation period, whether the save stop condition is matched, and notify, when the save stop condition is matched, the communication unit of a determination result indicating detection of a trigger as a trigger detection flag.