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Digit Designator Examples
The following examples show the digit designators (Di) used to make various
multiple-word conversions.
Rightmost 8 bits
Digit 3
Digit 2
Digit 1
Digit 0
0
1
1
2
Di Word Contents
Example 1
Leftmost 8 bits
Rightmost 8 bits
Leftmost 8 bits
Word S+1
Word S
Word D
Rightmost 8 bits
Digit 3
Digit 2
Digit 1
Digit 0
0
0
3
0
Di Word Contents
Example 2
Leftmost 8 bits
Rightmost 8 bits
Leftmost 8 bits
Word S+1
Word S
Word D
Rightmost 8 bits
Digit 3
Digit 2
Digit 1
Digit 0
0
3
1
Di Word Contents
Example 3
Leftmost 8 bits
Rightmost 8 bits
Leftmost 8 bits
Word S+1
Word S
Word D
1
Rightmost 8 bits
Leftmost 8 bits
Word S+2
Parity
0: None
With no parity, data can only be converted when the leftmost bit is zero. If it is not
set to zero, the Error Flag will turn ON and the data will not be converted.
1: Even
The data (8 bits) can only be converted when the number of “1” bits is even. If the
number is odd, the Error Flag will turn ON and the data will not be converted.
1 0 1 1 0 0 0 1
$31
Even number of “1” bits
Conversion
executed.
“1”
0 0 1 1 0 0 0 1
Odd number of “1” bits
Conversion
executed.
Not converted.
Example
Conversion Instructions
Section 5-17
Summary of Contents for CVM1D
Page 462: ...SYSMAC CVM1D Duplex System Programmable Controllers Operation Manual Revised August 2001...
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