Digital Logic Operations - Siemens S5-100U User Manual

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STEP 5 Operations

Digital Logic Operations

Digital logic operations combine the contents of both accumulators logically bit by bit.

Table 8-14 provides an overview of these digital logic operations. Examples follow the table.

Processing a Digital Logic Operation

A digital logic operation is executed regardless of the RLO. It also does not affect the RLO.

However, it sets condition codes according to the result of the arithmetic operation (see section 8.4).

Make sure both operands have the same number format. Then load them into the

accumulators before executing the operation.

Table 8-14. Overview of Digital Logic Operations

Combine bit by bit through logic AND

Combine bit by bit through logic OR

Combine bit by bit through logic EXCLUSIVE OR

EWA 4NEB 812 6120-02

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