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FX2N-8AD Analog input block Buffer Memory (BFM) 8
8-21
8.2.9 BFM #26: Upper/lower limit value error status
When you use the upper/lower limit value detection function (BFM #22 b1), the detection result
is written to BFM #26.
The lower limit value error or the upper limit value error of each channel is assigned to each bit
of BFM #26. When the data (BFM #10 to BFM #17) of each channel is outside the range from
the lower limit value error set value (BFM #71 to BFM #78) to the upper limit value error set
value (BFM #81 to BFM #88), the corresponding bit turns ON.
Once a bit turns ON, it remains ON until it is reset by BFM #99 or the power is turned off.
Even while an upper/lower limit value error is detected, the data (BFM #10 to BFM #17) of
each channel is continuously updated.
Table 8.2: Bit assignment in BFM #26
Bit
No.
Channel
No.
Description
Bit
No.
Channel
No.
Description
b0
CH1
Lower limit value error b8
CH5
Lower limit value error
b1 Upper limit value error b9 Upper limit value error
b2
CH2
Lower limit value error b10
CH6
Lower limit value error
b3 Upper limit value error b11 Upper limit value error
b4
CH3
Lower limit value error b12
CH7
Lower limit value error
b5 Upper limit value error b13 Upper limit value error
b6
CH4
Lower limit value error b14
CH8
Lower limit value error
b7 Upper limit value error b15 Upper limit value error