Mitsubishi Electric MELSEC FX-2DA User Manual page 5

3.4 Allocation of buffer memories (BFM)
BFM
*# 0 channel Initialization (Default = H00)
*# 1 channel 1
*# 2 channel 2
# 3-# 4 Reserved
*# 5 Last data reset (Default = 0)
# 6 Reserved
selection of A-D
conversion speed
*# 7
see note
# 8-#19 Reserved
BFM
*#20 Reset all to default
Gain/offset adjust prohibit
*#21
Initial value (0,1)
Offset/gain
*#22
setting command
Offset data (in mV or µA units)
*#23
Gain data (in mV or µA units)
*#24
#25-#28
#29 Error status (See next page)
#30 Identification code K3010 (See next page)
#31
contents
When set to 0, normal
speed is selected 18ms
When set to 1, high
speed is selected 3.5ms
b 3 b 2 b 1
default value: 0
Pro-
hibit
G 2 O 2 G 1
default value: 0
default value: 5,000
Reserved
Reserved
In BFM's (buffer memory) with an " * ", data
can be written from the programmable cont-
roller using the TO command.
These BFM's should always be given when the
programmable controller goes from STOP to
RUN. Buffer memory (BFM's) are reset to their
default settings upon power on.
The buffer memory also handles information
b 0
used to adjust the gain and offsets of the FX-
2DA unit. Status of the unit such as errors
are also available.
Permit
From BFM #29 and #30, data can be read
via the FROM command.
O 1
Offset value : the actual output value when
Gain value : the actual output value when
the digital input is 0.
the digital input is +1000.