S5-115F Manual STEP 5 Operations
RS flip-flop with flags
Circuit DiagramExample
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I 2.6I 1.3
F 11.7
A ”1” at input I 2.6 sets flip-flop F 11.7 (signal state ”1”).
If the signal state at input I 2.6 changes to ”0”, the state of
flag F 11.7 is maintained, i.e., the signal is latched.
A ”1” at input I 1.3 resets the flip-flop (signal state ”0”). If
the signal state at input I 1.3 changes to ”0”, flag F 11.7
maintains signal state ”0”.
The signal state of the flag is scanned and transferred to
output Q 3.4.
A I 2.6
S F 11.7
A I 1.3
R F 11.7
A F 11.7
= Q 3.4
Q 3.4
Q
S
R
F 11.7
I 1.3
I 2.6
I 2.6
I 1.3
CSF LAD
S
R Q
STL
F 11.7
Q 3.4
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EWA 4NEB 811 6149-02
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