Toshiba PROSEC T1 User Manual page 180

7. Instructions
FUN 061
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 .
( )
= - ´ +
y 1 FL x FL y
n n
is input data specified by A
Here; x
n
FL is filter constant, 1/10000 of data specified by B (data range: 0 to 9999)
y is output data to be stored in C
n
y is output data at last scan
n-1
This instruction is useful for filtering the analog input signal. C+1 is used for internal work data.
Execution condition
Input
OFF No execution
ON Execution (FL is limited within the range of 0 to 9999)
Operand
Name
A Input data
B Filter constant
C Output data
Example
The filtered data of XW04 is stored in D0110. (D0111 is used for internal work data)
When D0100 value is small
XW04
178
T1/T1S User's Manual
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DFL Digital Filter
´
-
n 1
Operation
Device
X Y R S T. C. XW YW RW SW T
D0110
Time
Output
OFF
ON
Register
C
Ö Ö Ö Ö Ö Ö
Ö Ö Ö Ö Ö Ö
Ö Ö Ö Ö Ö
When D0100 value is large
XW04
T1S only
Constant Index
D I J K
Ö Ö Ö Ö Ö
Ö
Ö
D0110
Time
6F3B0250