ABB REG670 - Reset;Set Function Block RSMEMORYQT

15.7.8 Reset/Set function block RSMEMORYQT
The Reset-set function (RSMEMORYQT) is a flip-flop with memory that can reset or
set an output from two inputs respectively. Each RSMEMORYQT function block has
two outputs, where one is inverted. The memory setting controls if, after a power
interruption, the flip-flop resets or returns to the state it had before the power
interruption. For a Reset-Set flip-flop, the RESET input has higher priority than the
SET input.
RSMEMORYQT can propagate the quality, the value and the time stamps of the
signals via IEC 61850.
Table 568: Truth table for RSMEMORYQT function block
RESET SET OUT NOUT
0 0 Last
value
Inverted last
value
0 1 1 0
1 0 0 1
1 1 0 1
15.7.8.1 Function block
RSMEMORYQT
SET
RESET
OUT
NOUT
IEC14000069-1-en.vsd
IEC14000069 V1 EN
Figure 394: RSMEMORYQT function block
15.7.8.2 Signals
Table 569: RSMEMORYQT Input signals
Name
Type Default Description
SET BOOLEAN 0 Input signal to set
RESET BOOLEAN 0 Input signal to reset
Table 570: RSMEMORYQT Output signals
Name
Type Description
OUT BOOLEAN Output signal
NOUT BOOLEAN Inverted output signal
Section 15 1MRK502052-UEN B
Logic
830
Technical manual