The 1S series ac servo system with safety functionality provides eight safety functions. All the functions satisfy PLe/SIL3, providing the highest-level safety and protecting the safety of operators, machinery and products while improving production equipment productivity. For example, in case of an emergency stop, synchronized motors decelerate to a stop, and the stationary state is monitored to avoid breakdown of products and machinery and restart the production equipment smoothly. Combining the system with the automation software Sysmac Studio, which provides an integrated development environment from design to commissioning, facilitates programming. This software helps improve equipment performance and optimize commissioning tasks.