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FX2N-8AD Analog input block Buffer Memory (BFM) 8
8-23
8.2.11 BFM #28: Scale over status
When the analog input value of each channel is outside the range in which A/D conversion is
available, the result is written to BFM #28.
Once a bit turns ON, it remains ON until it is overwritten with the OFF status by the TO
instruction given by the PLC main unit or the power is turned off.
Even while a scale over error is detected, the data (BFM #10 to BFM #17) of each channel is
continuously updated.
Table 8.4: Range in which A/D conversion is available
Voltage input
mode
Current input
mode
Thermocouple input mode
K type J type T type
- 10.240V to
10.235V
- 20.480mA to
20.470mA
-100
°
C to 1200
°
C
-148
°
F to 2192
°
F
-100
°
C to 600
°
C
-148
°
F to 1112
°
F
-100
°
C to 350
°
C
-148
°
F to 662
°
F