Filter
Top Products
E-30
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX3U-4DA (4-channel Analog Output)
5.4.13 BFM #38: Upper/lower limit function setting
Initial value: H0000
Numeric data type: Hexadecimal (H)
When any of the output data (BFM #1 to #4) becomes less than the lower limit (BMF #41 to #44) or more than
the upper limit (BFM #45 to #48), the relevant bit of the upper/lower limit function status (BFM #39) is turned
on.
The upper/lower limit function can be set valid or made invalid by writing a 4-digit hexadecimal number,
H, in BFM #38.
*1. When any value becomes less than the lower limit (BMF #41 to #44) or more than the upper limit
(BFM #45 to #48), the relevant bit of the upper/lower limit function status is turned on.
*2. When any value becomes less than the lower limit (BMF #41 to #44) or more than the upper limit
(BFM #45 to #48), the relevant bit of the upper/lower limit function status is turned on.
In this setting, analog values more than the upper limit and less than the lower limit are not output.
Set value Description
0 The upper/lower limit function is invalid.
1
The upper/lower limit function without output limitation is valid.
*1
2
The upper/lower limit function with output limitation is valid.
*2
Other than above
values
Invalid (setting values unchanged)
H
ch4
ch3
ch2
ch1
Upper limit
Lower limit
The value is output even if it exceeds
the upper limit.
The value is output even if it is
below the lower limit.
Analog value
Values more than the upper limit are not
output.
Values less than the lower limit are
not output.
Analog value
Upper limit
Lower limit