RS Reset-Set Flip Flop

RS  Reset-Set Flip Flop 








Parameter     Data Type      Memory Area          Description
<address>         BOOL         I, Q, M, L, D        Set or reset bit
   S                   BOOL         I, Q, M, L, D        Enabled reset instruction
   R                   BOOL         I, Q, M, L, D        Enabled reset instruction
   Q                   BOOL         I, Q, M, L, D          Signal state of<address>
Description 
RS (Reset-Set Flip Flop) is reset if the signal state is "1" at the R input, and "0" at the S input.
Otherwise, if the signal state is "0" at the R input and "1" at the S input, the flip flop is set. If the RLO is
"1" at both inputs, the order is of primary importance. The RS flip flop executes first the reset
instruction then the set instruction at the specified <address>, so that this address remains set for the
remainder of program scanning.
The S (Set) and R (Reset) instructions are executed only when the RLO is "1". RLO "0" has no effect
on these instructions and the address specified in the instruction remains unchanged.
MCR (Master Control Relay) dependency
MCR dependency is activated only if a RS flip flop is placed inside an active MCR zone. Within an
activated MCR zone, if the MCR is on, the addressed bit is reset to "0" or set to "1" as described
above. If the MCR is off, the current state of the specified address remains unchanged regardless of
input states.

If the signal state is "1" at input I0.0 and "0" at I0.1, memory bit M0.0 is set and output Q4.0 is "0".
Otherwise, if the signal state at input I0.0 is "0" and at I0.1 is "1", memory bit M0.0 is reset and output
Q4.0 is "1". If both signal states are "0", nothing is changed. If both signal states are "1", the set
instruction dominates because of the order; M0.0 is set and Q4.0 is "1".

If the example is within an activated MCR zone:
When MCR is on, Q4.0 is reset or set as described above.
When MCR is off, Q4.0 is left unchanged regardless of input states

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