thetripathi
Member
This is what I got from ABB Control Builder Help file about RS flip flop:
How to Use the Function Block
The RS bistable flip-flop, is a latch where the R1 input dominates. If the Set and R1 signals are both True, the output Q1 is False.
Specified in the IEC 61131 standard
This is what I got from S7 Help file about RS flip flop:
Description
The Reset_Set Flip Flop instruction executes instructions such as Set (S) or Reset (R) only when the RLO is 1. An RLO of 0 does not affect these instructions, the address specified in the instruction is not changed.
Reset_Set Flip Flop is reset when the signal state at input R is 1 and the signal state at input S is 0. If input R is 0 and input S is 1, the flip flop is set. If the RLO at both inputs is 1, the flip flop is set.
The Reset_Set Flip Flop instruction is affected by the Master Control Relay (MCR). For more detailed information about how the MCR functions, refer to MCR on/off.
I guess both the explanations are different from each other.Can anyone tell me the exact definition of RS block according to IEC standards.
Thanks
Preet