Function-block instructions that work with boolean (TRUE/FALSE) variables.
| Instruction | Description |
|---|---|
| SR | Set-Reset flip-flop (set-dominant) |
| RS | Reset-Set flip-flop (reset-dominant) |
| R_TRIG | Rising edge detection (FALSE-to-TRUE pulse) |
| F_TRIG | Falling edge detection (TRUE-to-FALSE pulse) |
To latch a value TRUE until an explicit reset, use the action qualifiers
S(Set/Stored) andR(Reset). See the Action Qualifiers reference.