Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual do Utilizador descarregar pdf (Página 146)

Data

Types

Chapter 7

7–4

This value requires two words of the processor data table. The first word

contains overflow, underflow and sign data and the three most significant

digits of the 6-digit BCD integer. The second word contains the lower three

digits of the value (figure 7.5). The value ranges from -999999 to +99999.

If an overflow or underflow condition exists, the appropriate bit is set and

a value of 000000 is reported. Fractional portions of any number used with

this routine are truncated.

Figure

7.5

runcated 6-Digit BCD Integer

7.2.5

6-digit, Signed,

Fixed Decimal BCD

1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 166 167

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Manual do Utilizador Página 146