Mitsubishi FX2N-5A User Manual page 47

FX2N-5A Special function block Buffer Memory (BFM) 7
The output characteristics such as offset and gain settings are automatically changed with the
settings of BFM 1. A mode change in BFM 1 will also affect the settings of BFM 45 (offset data)
and BFM 55 (gain data) or the settings of BFM 240 to 249 (Scaling function data). Before
changing offset/gain or Scaling function data, the mode setting in BFM 1 must be set,
otherwise, offset/gain or Scaling function data will be overwritten by the default data of the
selected mode.
Scale over status (BFM 28) that were existing before a mode change will not automatically be
cleared by performing a mode change.
The default value of BFM 1 is H0000.
The value of BFM 1 is stored non-volatile in the internal EEPROM. There is a safety function to
protect the internal EEPROM from being destroyed by accidentally writing the same value
continuously to BFM 1.
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