Memory Operators; D Flip Flop (Max Number = 16); T Flip Flop (Max Number = 16); Sr Flip Flop - Reer MZERO Installation, Use And Maintenance Manual

MEMORY OPERATORS

MEMORY operators can be used if you decide to save any data (TRUE or FALSE) from other project
components.
Status changes are performed according to the truth tables shown for each operator.

D FLIP FLOP (max number = 16)

The D FLIP FLOP operator saves the previously set status on
output Q according to the following truth table.
Preset Clear Ck
1 0 X
0 1 X
1 1 X
0 0 L
0 0 Rising edge 1
0 0 Rising edge 0
Parameters
Preset: If selected enables output Q to be set to 1 (TRUE).
Clear: If selected enables the saving process to be reset.

T FLIP FLOP (max number = 16)

This operator switches the Q output at each rising edge of
the T input (Toggle).
Parameters
:
Enable Clear If selected enables the saving process to be
reset.

SR FLIP FLOP

SR FLIP FLOP operator brings output Q
at 1 with Set, 0 with Reset.
See the following truth table.
SET RESET
0 0
0 1
1 0
1 1
66
STAND ALONE PROGRAMMABLE SAFETY CONTROLLER
D Q
X 1
X 0
X 0
X Keep memory
1
0
Q
Keep memory
0
1
0
8541403 • 19/07/2021 • Rev.1