Micromod RetroPAK: SLC Configuration Manual - Manual (Page 269)

Function Code 34 – Memory (RS Flip Flop)
GENERAL DESCRIPTION
This function memorizes its previous output when both inputs are logic 0. S1 is the set
(S) input, and S2 is the reset (R) input. When both inputs have the value logic 1, the
output assumes the override state specified by S4. Specification S3 is the initial state flag.
The value specified in <S3> will be the output after power up or a controller reset.
UTILIZATION
The MOD 30ML/MODCELL compound FC34 used here has an EX function block
(Expression block).
Figure 34 .1.
Function Code 34
The EX block has three inputs S1(Set),S2(Reset) and S4(Override). S3 as required in
Function code 34 is set as the Initial Data for the Result in the General tab of the EX
block FC34 as shown in the figure below:
34 - 1