Rockwell-automation 1761 MicroLogix 1000 Programmable Controllers Manual de usuario descargar pdf (Pagina 103)

100

101

Using Basic Instructions

6–5

Output Energize (OTE)

Use an OTE instruction in your ladder program to turn On a bit when rung

conditions are evaluated as true.

An example of a device that turns on or off is an output wired to a pilot light

(addressed as O0:0/4).

OTE instructions are reset when:

• You enter or return to the REM Run or REM Test mode or power is restored.

• The OTE is programmed within an inactive or false Master Control Reset

(MCR) zone.

Note A

bit that is set within a subr

outine using an OTE instruction r

emains set until the

subr

outine is scanned again.

Output Latch (OTL) and Output Unlatch (OTU)

OTL and OTU are retentive output instructions. OTL can only turn on a bit, while

OTU can only turn off a bit. These instructions are usually used in pairs, with both

instructions addressing the same bit.

Your program can examine a bit controlled by OTL and OTU instructions as often

as necessary

Under fatal error conditions, physical outputs are turned off. Once the error

conditions ar

e clear

ed, the contr

oller r

esumes operation using the data table

value of the operand.

Programming

Execution Times

(µsec) when:

True False

4.43 4.43

( )

False

4.97

Execution Times

(µsec) when:

True

3.16

OTL

4.97 3.16OTU

(L)

(U)

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 421 422

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