Addressing Reference
1785 PLC-5
13
Figure 8
Word
of ASCII (ANSI X3.4) File
1514131211109876543210
PLC Data Type: signed word
17410–I
ASCII character ASCII character
Figure 9
Word
of a Binary File
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
PLC Data Type: signed word (negative values in 2’s complement form)
Range: –32,768 thru +32,767
17411–I
Figure 10
Word
of Decimal (BCD) File
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MSD = Most significant digit
LSD = Least Significant Digit
PLC Data Type: signed word
Display: BCD (4 digits per word) 0 thru 9,000
17412–I
MSD LSD
Figure 1
1
Word
of Floating-Point File
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
17394–I
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
S
Exponent (8 bits)
Mantissa (23 bits)
PLC Data Type: IEEE Float (32-bit value)
Range: +/– 1.1754944 E–38 thru +/– 3.4028237 E+38
Figure 12
Word
of Integer File
1514131211109876543210
PLC Data Type: signed word (negative values in 2’s complement form)
Range: –32,768 thru +32,767
17415–I
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