The FM 354 is a positioning module for position control with servomotors. It is suitable for precise position control in the face of load fluctuations or high dynamic response.
The FM 354 can be used for simple point-to-point positioning as well as for complex velocity profiles with the very highest demands on dynamic response, precision and speed, and is thus the ideal solution for positioning tasks with high clock-pulse rates both in mini controls and in distributed configurations directly on the machine.   
The FM 354 is used in the SIMATIC S7-300, C7 and ET 200M on S7 masters as well as with WinAC Slot41x.