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 |
|---|
| 3 |
Operands
| Operand | Description |
|---|---|
| D | The only operand. Entries are only WORD data registers. This is the value that swaps the lower byte with the upper byte. The signed value range is -32,768 ~ 32,767 (216). The unsigned value range is 0 ~ 65,535 (216-1). The Hexadecimal value range is H0000 ~ HFFFF. |
Notice
Error Flag (F11.0) Notice
The error flag, F11.0, will be ON for one scan when the address of the data register assigned by @D exceeds the range of the data register, D. The range of the data register, D, is dependent on the CPU type.
Execution Condition
It is recommended that the SWAP instructions be used with a pulse contact as an execution condition, or use the SWAPP instruction.
Ladder Diagram Examples
SWAP
The SWAP instruction swaps the upper byte of the WORD data register, D, with the lower byte of the WORD data register, D.
When the contact, M0.1 is ON (1), the instruction swaps the upper byte of the data register, D50, with the lower byte of the same data register.
Memory Monitor
SWAPP
The SWAPP one-shot instruction swaps the upper byte of the WORD data register, D, with the lower byte of the WORD data register, D. Every time this instruction executes, it energizes the output only once.
When the contact, M0.1 is ON (1), the instruction swaps the upper byte of the data register, D55, with the lower byte of the same data register.
Memory Monitor
