Signals; Rs Flip-Flop, Volatile Rs; Function Block; Functionality - ABB RELION REX640 Technical Manual

Section 3
Basic functions
3.21.8.3
3.21.9
3.21.9.1
3.21.9.2
276
The statuses of outputs Q and NOTQ are not retained in the nonvolatile
memory.
Table 285: Truth table for SR flip-flop
S
0
0
1
1
1) Keep state/no change

Signals

Table 286: SR Input signals
Name Type
S BOOLEAN
R BOOLEAN
Table 287: SR Output signals
Name
Q
NOTQ

RS flip-flop, volatile RS

Function block

GUID-4C8A6461-20D6-4E7B-9BC7-5575967F6A77 V1 EN
Figure 148: 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.
R
0
1
0
1
Default
0=False
0=False
Type
BOOLEAN
BOOLEAN
1MRS759142 C
Q
0 1)
0
1
1
Description
Set Q output when set
Resets Q output when
set
Description
Q status
NOTQ status
REX640
Technical Manual