PID_3Step This section contains information on the following topics:New features of PID_3Step (S7-1200, S7-1500)Compatibility with CPU and FW (S7-1200, S7-1500)CPU processing time and memory requirement PID_3Step V2.x (S7-1200, S7-1500)PID_3Step V2 (S7-1200, S7-1500)PID_3Step V1 (S7-1200)