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FX2N-5A Special function block Buffer Memory (BFM) 7
7-20
7.2.11 BFM 20 Initialization function (reset all values to default) (READ/WRITE)
BFM 20 will reset the FX
2N
-5A to the factory default.
By initialization, the modes, average numbers, offset/gain settings, direct output control
function, lower/upper-limit settings, Scaling function and sudden change function are all reset
to factory default (voltage input/output, default offset/gain values).
Permitted values are as follows:
K0:Normal state, nothing is performed
K1:initialization will be executed. After writing K1, the BFM will return automatically to K0 when
initialization is completed.
On fault input, the module will ignore other values than K1 and perform nothing except keeping
K0 as content of BFM 20.
Writing to BFM 20 triggers several data items to be written to the internal EEPROM. To protect
the internal EEPROM from damage by permanently writing K1 to BFM 20, there is a safety
function, which will memorize the reset in order to protect the internal EEPROM from being
destroyed by accidentally writing K1 continuously to BFM 20.
Writing K1 to BFM 20 will set the following BFM to their default values as stated below:
BFM 0 to 5, BFM 18, BFM 22, BFM 23, BFM 25, BFM 41 to 45, BFM 51 to 55, BFM 71 to 74,
BFM 81 to 84, BFM 91 to 94, BFM 200 to 249.