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T1/T1S User’s Manual
7. Instructions
FUN 061 DFL Digital Filter
Expression
Input
-
[
A
DFL
B
®
C
]
-
Output
Function
When the input is ON, this instruction calculates the following formula to perform digital filtering for
input data
A
by filter constant by
B
, and stores the result in
C
.
()
yFLxFLy
nnn
=- ´+ ´ -
1
1
Here; x
n
is input data specified by
A
FL is filter constant, 1/10000 of data specified by
B
(data range: 0 to 9999)
y
n
is output data to be stored in
C
y
n-1
is output data at last scan
This instruction is useful for filtering the analog input signal.
C+1
is used for internal work data.
Execution condition
Input Operation Output
OFF No execution OFF
ON Execution (FL is limited within the ran
g
e of 0 to 9999) ON
Operand
Name Device Re
g
ister Constant Index
X Y R S T. C. XW YW RW SW T C D I J K
A
Input data
ÖÖÖÖÖÖÖÖÖÖ Ö
B
Filter constant
ÖÖÖÖÖÖÖ
C
Output data
ÖÖÖÖÖÖ
Example
The filtered data of XW04 is stored in D0110. (D0111 is used for internal work data)
XW04
D0110
Time
XW04
D0110
Time
T1S only
When D0100 value is largeWhen D0100 value is small
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