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3.17.1.13
RS function block
Function block
Figure 76: Function block
Functionality
The RS flip-flop output
Q
can be set or reset from the
S
or
R
inputs. R input has a
higher priority over the S input. Output
NOTQ
is the negation of output
Q
.
The statuses of outputs
Q
and
NOTQ
are not retained in the nonvolatile
memory.
Table 139: Truth table for RS flip-flop
S
R
Q
0
0
0
1
0
1
0
1
0
1
1
1
0
Signals
Table 140: RS Input signals
Name
Type
Default
Description
S
BOOLEAN
0=False
Set Q output when
set
R
BOOLEAN
0=False
Resets Q output
when set
Table 141: RS Output signals
Name
Type
Description
Q
BOOLEAN
Q status
NOTQ
BOOLEAN
NOTQ status
1
Keep state/no change
Basic functions
1MRS758755 C
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REC615 & RER615
Technical Manual