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FX2N-5A Special function block Buffer Memory (BFM) 7
7-47
7.2.35 BFM 200 to BFM 249 Scaling function (READ/WRITE)
The Scaling function enables an analog input or output curve, for processes that are not linear
over the whole data range. The user can specify up to 5 analog/digital values, that will define
an input characteristic curve.
If the Scaling function is used, the offset/gain settings will become meaningless for this
channel, as the input/output will be calculated by the Scaling function given by the user.
Analog scale value and digital value outside the range selected by BFM 0 and 1 is set.
Offset/gain set value becomes error (BFM 29 b1).
The order of allocating an analog value and a digital value differs for in the input channels and
the output channel.
Table 7.13: Allocation of BFM #200 to #249
Channel No. Set value kind
BFM No.
Change
point 1
Change
point 2
Change
point 3
Change
point 4
Change
point 5
Analog input channel
CH1
Analog scale value #200 #202 #204 #206 #208
Digital value #201 #203 #205 #207 #209
Analog input channel
CH2
Analog scale value #210 #212 #214 #216 #218
Digital value #211 #213 #215 #217 #219
Analog input channel
CH3
Analog scale value #220 #222 #224 #226 #228
Digital value #221 #223 #225 #227 #229
Analog input channel
CH4
Analog scale value #230 #232 #234 #236 #238
Digital value #231 #233 #235 #237 #239
Analog output channel
Digital value #240 #242 #244 #246 #248
Analog scale value #241 #243 #245 #247 #249