Pulse Output (Rising Edge)
Instruction Parameters
Supported PLC Series
| XPnA/1R | XPnB | XPnE | XPnF | CP3A/B/P/U CP4A~D/U | CPnE | CPnF | BP | PLC-S |
|---|---|---|---|---|---|---|---|---|
| ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Supported Data Registers
| M | X | Y | K | L | F | T | C | S | Z | R | Q | D | @D | Constant | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D | ✓ | - | ✓ | ✓ | ✓ | - | - | - | - | - | - | ✓ | ✓ | - | - |
Supported Flags
| Flag | Bit | Support |
|---|---|---|
| Error | F11.0 | - |
| Zero | F11.1 | - |
| Carry | F11.2 | - |
Number of Steps
| Steps |
|---|
| 1 |
Operands
| Operand | Description |
|---|---|
| D | The only operand. Entries are only BOOL data registers. This is the result to output on a falling edge. |
Notice
Instruction Behavior
The PLF instruction behaves as follows:
- When the execution condition goes from ON to OFF, the assigned data register, D, turns ON for 1 scan.
- When the execution does NOT change states or changed from OFF to ON, then the assigned data register, D, does NOT turn ON.
- Even if the RUN/STOP key switch is changed (RUN→STOP) after the execution of the PLF instruction, the instruction will NOT be executed again until the proper change of state of the executing statement from ON to OFF occurs.