ABB RER620

1MAC309294-MB F Section 3
Basic functions
RER620 75
Technical Manual
3.11.1.11 SR function block
Function block
Figure 30: Function block
Functionality
The SR flip-flop output Q can be set or reset from the s or R inputs. s input has a higher
priority over the R input. Output NOTQ is the negation of output Q.
Table 90: Truth table for SR flip-flop
1)
Keep state/no change
Table 91: T_POS_OK Input signals
Table 92: T_POS_CL Output signals
The statuses of outputs Q and NOTQ are not retained in the nonvolatile
memory.
S R Q
00
0
1)
010
101
111
Name Type Default Description
S BOOLEAN 0 =False Set Q output when set
R BOOLEAN 0 =False Resets Q output when set
Name Type Description
Q BOOLEAN Q status
NOTQ BOOLEAN NOTQ status
SR
S
R
Q
Q