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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S1 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | – | ✓ | – | ✓ | ✓ | ✓ | – |
| S2 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | – | ✓ | – | ✓ | ✓ | ✓ | ✓ |
| D | ✓ | – | ✓ | ✓ | ✓ | – | ✓ | ✓ | – | ✓ | – | ✓ | ✓ | ✓ | – |
| n | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | – | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Supported Flags
| Flag | Bit | Support |
|---|---|---|
| Error | F11.0 | ✓ |
| Zero | F11.1 | – |
| Carry | F11.2 | – |
Number of Steps
| Steps |
|---|
| 5 |
Operands
| Operand | Description |
|---|---|
| S1 | The first operand. Entries are only WORD data registers. The signed value range is for each data register -32,768 ~ 32,767 (216). The unsigned value range for each data register is 0 ~ 65,535 (216-1). The Hexadecimal value range for each data register is H0000 ~ HFFFF. |
| S2 | The second operand. Entries are WORD data registers or constants. The signed value range for each data register is -32,768 ~ 32,767 (216). The unsigned value for each data register range is 0 ~ 65,535 (216-1). The Hexadecimal value for each data register range is H0000 ~ HFFFF. |
| D | The third operand. Entries are only WORD data registers. This is where the result of a logical S1 XNOR S2 is saved. |
| n | The fourth operand. Entries are WORD data registers or constants. This is the amount of words for a logical S1 ~ Sn XNOR S2 ~ Sn. |
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. F11.0 turns ON when the value of the data for a logical XNOR exceeds the data register assigned to S1 or S2.
Logical Operation
The BKXNR and BKXNRP instructions will perform a logical XNOR on each bit of the data registers between S1 ~ Sn and S2 ~ Sn.
Ladder Diagram Examples
BKXNR
The BKXNR instruction performs a logical XNOR on n number of WORD data registers starting at S1 and n number of data registers starting at S2 and saves the result in an assigned WORD data register, D.
When the contact, M1.5, is powered ON (1), logical XNOR operations are performed on 3 WORD data registers, D50, D51, and D52, with another 3 WORD data registers, D54, D55, and D56. The results of the logical XNOR operations are saved in 3 WORD data registers, D58, D59, and D60.
Memory Monitor
The below image shows the direct logical XNOR operations for each data register.
BKXNRP
The BKXNRP one-shot instruction performs a logical XNOR on n number of WORD data registers starting at S1 and n number of data registers starting at S2 and saves the result in an assigned WORD data register, D. Every time this instruction energizes, it executes only once.
When the contact, M1.7, is powered ON (1), logical XNOR operations are performed on 2 WORD data registers, D60, and D61, with another 2 WORD data registers, D63, and D64. The results of the logical XNOR operations are saved in 2 WORD data registers, D66, and D67.
Memory Monitor
The below image shows the direct logical XNOR operations for each data register.
