Mitsubishi Electric FX2N-8AD - BFM #28: Scale over Status

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 input is available,
the result is written to BFM #28.
*1 The above table shows the available input range in the current input mode. A scale over
status bit turns ON when the analog input value is as follows:
Input mode 3 to 5 :
- 40.8mA
or less,
40.8mA
or more
Input mode 6 to 8 :
- 1.25mA
or less,
40.8mA
or more
Use the upper / lower limit detection function to detect the scale over status in the current
input mode.
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 input is available
Voltage input
mode
Current input
mode
*1
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