Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers Manual de usuario descargar pdf (Pagina 167)

100

101

Using Data Handling Instructions

9–19

Or (OR)

The

value at source A is ORed bit by bit with the value at source B and then stored

in the destination.

Truth Table

Dest = A OR B

A B Dest

0 0 0

1 0 1

0 1 1

1 1 1

Source

A and B can either be a word address or a constant; however

, both sources

cannot be a constant. The destination must be a word address.

Updates to Arithmetic Status Bits

With this Bit: The Controller:

S:0/0 Carry (C) always resets.

S:0/1 Overflow (V) always resets.

S:0/2 Zero (Z) sets if result is zero; otherwise resets.

S:0/3 Sign (S)

sets if result is negative (most significant bit is set) otherwise

resets.

Programming

Execution Times

(µsec) when:

True False

33.68 6.78

BITWISE INCLUS OR

Source A

Source B

Dest

1 2 ... 162 163 164 165 166 167 168 169 170 171 172 ... 421 422

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Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers Manual de usuario Pagina 167

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