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Function Blocks
LTCH Latch Function Block
Revision 11
HC900 Hybrid Control Designer Function Block Reference Guide
187
2/07
LTCH Latch Function Block
Description
The
LTCH
label stands for
Latch.
This block is part of the
Logic
and
Fast Logic
categories.
Function
Latches output
(OUT) ON when latch input (L) turns ON and maintain latched output until unlatch input
(U) turns ON. Note that latch input must be OFF for unlatch input
to work.
•
If U = ON, then:
OUT = OFF.
•
If L = ON, then:
OUT = ON.
•
Else,
OUT = Previous State.
Input
L
= Latch Command Digital signal.
U
= Unlatch Command Digital signal.
Output
OUT
= Digital signal
Block properties
Double click on the function block to access the function block properties dialog box.
Содержание HC900
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