Rockwell-automation 1771-DB Basic Module User Manual - Series A Uživatelský manuál stáhnout pdf (Strana 144)

Data

Types

Chapter 7

7–2

This value requires one word of the processor data table. The data is

represented by a 3-digit binary coded decimal integer (figure 7.2).

Overflow, underflow and sign are also indicated. An underflow or

overflow condition sets the appropriate bit and a value of 000 is returned.

The value ranges from -999 to +999. Fractional portions of any number

used with the routine are truncated.

Figure

7.2

runcated 3-Digit BCD Integer

This value requires one word of the processor data table. The data is

represented by a 4-digit BCD integer (figure 7.3). The value ranges from

0-9999. There is no indication of sign, underflow or overflow. However, if

a value of greater than 9999 is converted, the value reported is 0000.

Fractional portions of any number used with the routine are truncated.

7.2.2

3-digit, Signed,

Fixed Decimal BCD

7.2.3

4-digit, Unsigned,

Fixed Decimal BCD

1 2 ... 139 140 141 142 143 144 145 146 147 148 149 ... 166 167

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Rockwell-automation 1771-DB Basic Module User Manual - Series A Uživatelský manuál Strana 144