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Automating Manufacturing Systems - Process Control and ...

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plc function ref - 34.11<br />

DTR - Data TRansition<br />

DTR<br />

DATA TRANSITION<br />

Source N7:0<br />

Mask 00FF<br />

Reference N7:1<br />

Description:<br />

This function will examine the source value <strong>and</strong> mask out bits using the<br />

mask. The value will be compared to the Reference value, <strong>and</strong> if the<br />

values agree, then the function will be true for one scan, after that it<br />

will be false.<br />

A<br />

Status Bits:<br />

none<br />

Registers: none<br />

Available on: Micrologix, PLC-5<br />

EQU, GEQ, GRT, LEQ, LES, NEQ - EQUals, Greater than or EQuals, GReater Than,<br />

Less than or EQuals, LESs than, Not EQuals<br />

EQU<br />

EQUALS<br />

Source A<br />

Source B<br />

N7:0<br />

N7:1<br />

A<br />

Description:<br />

Status Bits:<br />

The basic compare has six variations. Each of these will look at the values<br />

in source A <strong>and</strong> B <strong>and</strong> check for the comparison case. If the comparison<br />

case is true, the output will be true. The types are,<br />

EQU - Equals<br />

GEQ - Greater than or equals<br />

GRT - Greater than<br />

LEQ - Less than or equals<br />

LES - Less than<br />

NEQ - Not equal<br />

none<br />

Registers: none<br />

Available on: Micrologix, PLC-5

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