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FX2N-8AD Analog input block Buffer Memory (BFM) 8
8-2
Data transfer between the FX
2N
-8AD and the PLC main unit is performed through buffer
memories (hereafter referred to as "BFM") of the FX
2N
-8AD.
Each BFM consists of 1 word, 16 bits. The BFM No. 0 to 3399 and a function are assigned to
each BFM.
Use FROM/TO instructions to read and write the data between the BFM and the PLC.
When the power is turned on from off, the initial value is written to each BFM. When you would
like to use different contents of the BFM, create a program for the PLC so that the desired
contents are written to the BFM every time the power of the PLC is turned on.
(The contents stored in BFM #0, #1, #19, #22, #24, #41 to #48 and #51 to #58 are stored in the
built-in EEPROM, and held against power failure.)