Rockwell-automation 9301 Series RSView32 Users Guide Uživatelský manuál stáhnout pdf (Strana 526)

100

101

Creating expressions  14–13

Symbol Operator Action

& AND Compares two integers or integer tags on a bit–by–bit basis.

Returns an integer with a bit set to 1 if both the corresponding bits

in the original numbers are 1. Otherwise, the resulting bit is 0.

| inclusive OR Compares two integers or tags on a bit–by–bit basis.

Returns an integer with a bit set to 1 if either or both of the

corresponding bits in the original numbers are 1. If both bits are 0,

the resulting bit is 0.

^exclusive OR

(XOR)

Compares two integers or tags on a bit–by–bit basis.

Returns an integer with a bit set to 1 if the corresponding bits in

the original numbers differ. If both bits are 1 or both are 0, the

resulting bit is 0.

>> right shift Shifts the bits within an integer or tag to the right.

Shifts the bits within the left operand by the amount specified in

the right operand. The bit on the right disappears.

Either a 0 or a 1 is shifted in on the left, depending on whether the

left–most bit is a 0 or a 1. If the left–most bit is 0, a 0 is shifted in.

If the left–most bit is 1, a 1 is shifted in. In other words, the sign of

the number is preserved.

<< left shift Shifts the bits within an integer or tag to the left.

Shifts the bits within the left operand by the amount specified in

the right operand. The bit on the left disappears and 0 always

shifts in on the right.

~ complement Returns one’s complement; that is, it toggles the bits within an

integer or tag.

Reverses every bit within the number so every 1 bit becomes a 0

and vice versa.

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