Bfm#38: Upper/Lower Limit Function Setting - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U
FX -4DA (4-channel Analog Output)
3U

5.4.13 BFM#38: Upper/lower limit function setting

When any of the output data (BFM#1 to #4) becomes less than the lower limit (BFM#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.
H
ch4
ch3
Set value
0
1
2
Other than above values
*1. When any value becomes less than the lower limit (BFM#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.
Analog value
Upper limit
Lower limit
*2. When any value becomes less than the lower limit (BFM#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.
Analog value
Upper limit
Lower limit
E-30
PLC User's Manual - Analog Control Edition
3UC
ch1
ch2
The upper/lower limit function is invalid.
The upper/lower limit function without output limitation is valid.
The upper/lower limit function with output limitation is valid.
Invalid (setting values unchanged)
The value is output even if it exceeds
the upper limit.
Values more than the upper limit are not
output.
Description
The value is output even if it is
below the lower limit.
Values less than the lower limit are
not output.
5 Buffer Memory (BFM)
5.4 Buffer Memory Details
Initial value: H0000
Numeric data type: Hexadecimal (H)
*1
*2