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FX2N-5A Special function block Buffer Memory (BFM) 7
7-58
If the Scaling function is selected, the analog module will return the following values in BFM 10:
analog input value: x < -10000: y = const. 50 (range error is entered in BFM28)
analog input value: -10000 < x < -4000 y = 0.0375 * x + 425
analog input value: -4000 < x < 3000 y = 0.0143 * x + 332,15
analog input value: 3000 < x < 10000 y = 0.0071 * x + 353.85
analog input value: x > 10000 y = const. 425 (range error is entered in BFM28)
The same principle applies for the analog output, however, the first value in BFM 240 must be
a digital value and the second value must be the corresponding analog output value. The
dimension of the values is specified by the mode in BFM 0 and BFM 1.
If a mode-change is set and a Scaling function setting error appears the default-value will be
taken. If only a Scaling function setting error appears, the previous correct value will be take.
At least the first two analog/digital values must be set. If the other three analog/digital values
are set to 0 they will not be used by the Scaling function. By setting the first three analog/digital
value and resetting the last two analog/digital values, three parameter will be used by the
Scaling function etc.
Table 7.14:
Change point 1 Change point 2 Change point 3 Change point 4 Change point 5
Analog Input
Scale Value
BFM#200:-10000 BFM#202:-4000 BFM#204:3000 BFM#206:10000 BFM#208: K0
Calculated
Digital Value
BFM#201:50 BFM#203:275 BFM#205:375 BFM#207:425 BFM#209: K0