Rs Flip-Flop, Volatile Rs - ABB RELION REX640 Technical Manual

Basic functions
Table 309: Truth table for SR flip-flop
S
0
0
1
1
3.21.8.3 Signals
Table 310: SR Input signals
Name
S
R
Table 311: SR Output signals
Name
Q
NOTQ
3.21.9

RS flip-flop, volatile RS

3.21.9.1 Function block
Figure 171: Function block
3.21.9.2 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.
1
Keep state/no change
298
R
0
1
0
1
Type
BOOLEAN
BOOLEAN
Type
BOOLEAN
BOOLEAN
The statuses of outputs Q and NOTQ are not retained in the nonvolatile
memory.
Q
1
0
0
1
1
Default Description
0=False Set Q output when
set
0=False Resets Q output
when set
Description
Q status
NOTQ status
1MRS759142 F
REX640
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