Rockwell-automation DeviceLogix System User Manual Manual do Utilizador descarregar pdf (Página 99)

Publication RA-UM003B-EN-P - February 2010 99

Navigate the Old Ladder Editor Interface Chapter 4

Set Dominant Latch

When using a set dominant latch, the accompanying reset element

must appear before the SRL element. Refer to the truth table for

information about the set dominant latch.

Reset Dominant Latch

When using a reset dominant latch, the accompanying reset element

must appear after the RSL element. Refer to the truth table for

information about the reset dominant latch.

Function Reset Input (Set) Output Value at

time = t

Output Value at

time = t

0+1

set dominant

(A set dominant

block goes to the

set state if both

inputs are true.)

0 0 0 0

0 1 0 1

1 0 0 0

1 1 0 1

0 0 1 1

0 1 1 1

1 0 1 0

1 1 1 1

reset dominant

(A reset dominant

block goes to the

false state if both

inputs are true.)

0 0 0 0

0 1 0 1

1 0 0 0

1 1 0 0

0 0 1 1

0 1 1 1

1 0 1 0

1 1 1 0

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Rockwell-automation DeviceLogix System User Manual Manual do Utilizador Página 99