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RailCorp Engineering Manual — Signals — Equipment Manual

Cerberus Level Crossing Monitor Field Equipment Manual TMG E1261

or as a Boolean expression

C = A & B

C will only be true when both A and B are true.

6.1.2.7.2 OR Operator

The logical OR operation is represented by the "+" character.

Examples of logical OR operations are as follows:

Either as relay logic by:

or as a Boolean expression

C = A + B

C will be true when either A or B are true.

6.1.2.7.3 NOT Operator

The logical NOT operation is represented by the "!" character.

Examples of logical NOT operations are as follows:

Either as relay logic by:

or as a Boolean expression by:

C = !A

C will be true when A is not true.

Issued August 2012 UNCONTROLLED WHEN PRINTED Version 2.1

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