Data communication between analog modules

Buffer register (BFM) allocation

FX series PLC basic unit and FX - 4AD, FX - 2da etc. analog module between data communication is performed by the from and to instructions, communication modules plc ,from is basic unit reads data from the FX -- 4AD, FX - 2da instruction, the TOS are from the basic unit writes the data to the FX -- 4AD, FX - 2da instruction. Actually read and write operations are FX - FX, 2DA - 4AD buffer register BFM.

This buffer register consists of 16 registers of 32 bits, plc communication modules ,numbered #31 1 BFM#0.