Using FM 351 This section contains information on the following topics:Terminal assignment of FM 351 front connector (S7-300, S7-400)Functions of the FM 351 (S7-300, S7-400)Parameter assignment FM 351 (S7-300, S7-400)Using FM 351 from the user program (S7-300, S7-400)FM 351: Online & Diagnostics (S7-300, S7-400)