FX2N-5A Special function block Buffer Memory (BFM) 7
7-22
7.2.13 BFM 22 Convenient functions setting (READ/WRITE)
The functions described below are assigned to b0 to b3 of BFM 22. When a bit is set ON, the
assigned functions become valid. Other bits, not specified by the values below, will simply be
ignored by the module if they are accidentally set by the user.
When a bit is set OFF, the assigned functions become invalid.
b0: Upper/lower limit average value detection function
If the A/D averaged conversion data of a channel (BFM 6 to BFM 9) is outside the range set
between the lower limit value (BFM 71 to BFM 74) and the upper limit value (BFM 81 to BFM
84), corresponding alarm bits for each channel (lower limit alarm or higher limit alarm) are set
in BFM 26.
b1: Upper/lower limit immediate value detection function
If the A/D immediate conversion data of a channel (BFM 10 to BFM 13) is outside the range set
between the lower limit value (BFM 71 to BFM 74) and the upper limit value (BFM 81 to BFM
84), corresponding alarm bits for each channel (lower limit alarm or higher limit alarm) are set
in BFM 26.
b2: Average data Peak value hold function
The minimum value of the average data (BFM 6 to BFM 9) of each channel is written to BFM
101 to BFM 104, and the maximum value is written to BFM 111 to BFM 114.
b3: Immediate data Peak value hold function
The minimum value of the immediate data (BFM 10 to BFM 13) of each channel is written to
BFM 105 to BFM 108, and the maximum value is written to BFM 115 to BFM 118.
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