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FX2N-5A Special function block Buffer Memory (BFM) 7
7-13
8: Voltmeter display mode (-100mV to + 100mV) (Display range -10000 to +10000)
9: Scaling function Voltage input mode (-10 to +10 V) (maximum Display range -32768 to
+32767); default = -32640 to +32640
A:Scaling function Current input mode (4 to +20 mA) (maximum Display range -32768 to
+32767); default = -32640 to +32640
B:Scaling function Voltage input mode (-100 to +100 mV) (maximum Display range -32768 to
+32767); default = -32640 to +32640
F: channel disabled, channel returns always 0.
C to E: not valid; the module will automatically restore the last valid setting.
The input characteristics such as the offset and gain settings are automatically changed
depending on the settings of BFM 0. A mode change in BFM 0 will also affect the settings of
BFM 41 to 44 (offset data), BFM 51 to 54 (gain data), and BFM 200 to 239 (Scaling function
data). Before changing offset/gain or Scaling function data, the appropriate input mode
specification must be set in BFM 0, otherwise, the offset/gain or Scaling function data will be
overwritten by the default data of the selected input mode.
The scale over status (BFM 28) value present before the mode change will not automatically
be cleared when performing a mode change.
Disabling a channel will increase the scanning frequency of the other channels.
The default value of BFM 0 is H0000.
The value of BFM 0 is stored in the internal EEPROM (non-volatile). The module contains a
safety function to protect the internal EEPROM from being destroyed when the same value is
accidentally written continuously to BFM 0.