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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S | ✓ | – | ✓ | ✓ | ✓ | – | ✓ | ✓ | – | ✓ | ✓ | ✓ | ✓ | ✓ | – |
| D | ✓ | – | ✓ | ✓ | ✓ | – | ✓ | ✓ | – | ✓ | ✓ | ✓ | ✓ | ✓ | – |
| n | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | – | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Supported Flags
| Flag | Bit | Support |
|---|---|---|
| Error | F11.0 | ✓ |
| Zero | F11.1 | – |
| Carry | F11.2 | – |
Number of Steps
| Steps |
|---|
| 4 |
Operands
| Operand | Description |
|---|---|
| S | The first operand. Entries are only WORD data registers. This is the starting data register to exchange the values of the data registers D ~ Dn with. 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. |
| D | The second operand. Entries are only WORD data registers. This is the starting data register to exchange the values of the data registers S ~ Sn with. 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. |
| n | The third operand. Entries are WORD data registers or constants. This is how many data registers from S ~ Sn to exchange the values with the data registers D ~ Dn. |
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 BXCH instructions be used with a pulse contact as an execution condition, or use the BXCHP instruction.
Ladder Diagram Examples
BXCH
The BXCH instruction exchanges n number of WORD data registers starting at S with n number of WORD data registers starting at D.
When the contact, M0.0, is powered ON (1), the instruction exchanges the values of 3 data registers starting at D20 with 3 data registers starting at D25.
Memory Monitor
BXCHP
The BXCHP one-shot exchanges n number of WORD data registers starting at S with n number of WORD data registers starting at D. Every time this instruction executes, it energizes the output only once.
When the contact, M0.1, is powered ON (1), the instruction exchanges the values of 4 data registers starting at D30 with 4 data registers starting at D35.
Memory Monitor
