Instruction Parameters
Supported PLC Series
| PLC-AES | PLC-FB | PLC-ES |
|---|---|---|
| ✓ | ✓ | ✓ |
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 rising edge. |
Notice
Instruction Behavior
The PLS instruction behaves as follows:
- When the execution condition goes from OFF to ON, the assigned data register, D, turns ON for 1 scan.
- When the execution does NOT change states or changed from ON to OFF, then the assigned data register, D, does NOT turn ON.
- Even if the RUN/STOP key switch is changed (STOP→RUN) after the execution of the PLS instruction, the instruction will NOT be executed again until the proper change of state of the executing statement from OFF to ON occurs.
Ladder Diagram Examples
PLS
The PLS instruction turns ON the assigned BOOL data register, D, for 1 scan when the execution condition goes from OFF to ON, or on the rising edge of the input signal.
When the contact, M10.3, is energized, the PLS instruction turns the bit, D35.C, ON (1) on the rising edge of the contact.
