Bfm #91 To Bfm #98: Sudden Change Detection Set Value - Mitsubishi Electric FX2N-8AD User Manual

FX2N-8AD Analog input block
8.2.19

BFM #91 to BFM #98: Sudden change detection set value

When using the sudden change detection function (BFM #22 b2), write the set value to judge
the sudden change.
When the data (BFM #10 to BFM #17) of each channel is updated, if the difference between
the previous value and the new value is larger than the sudden change detection set value
(BFM #91 to BFM #98), the result is written to the sudden change detection status (BFM #27).
Setting range
The setting range varies depending on the setting of the input mode (BFM #0, BFM #1).
The table below shows the setting range in each input mode.
Write the set value in a digital value.
Table 8.11: Setting range
0: Voltage input mode (-10 to +10 V), resolution 10 V x 1/16,000
1: Voltage input mode (-10 to +10 V), resolution 10 V x 1/4,000
2: Voltage input mode, analog value direct display (-10,000 to +10,000)
3: Current input mode (4 to 20 mA), resolution 20 mA x 1/8,000
4: Current input mode (4 to 20 mA), resolution 20 mA x 1/4,000
5: Current input mode, analog value direct display (4,000 to 20,000)
6: Current input mode (-20 to +20 mA), resolution 20 mA x 1/8,000
7: Current input mode (-20 to +20 mA), resolution 20 mA x 1/4,000
8: Current input mode, analog value direct display (-20,000 to +20,000)
9: Thermocouple input mode (K type), Celsius display
Input mode (BFM #0, BFM #1)
Buffer Memory (BFM) 8
Setting range Initial value
1 to 16383 1600
1 to 4095 400
1 to 10000 1000
1 to 4095 400
1 to 2047 200
1 to 8191 800
1 to 8191 800
1 to 4095 400
1 to 20000 2000
1 to 6500 650
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