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 WORD data registers or constants. This is the value to be encoded. 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 where the encoded data is saved. |
| n | The third operand. Entries are WORD data registers or constants. This is the exponent of 2n for the amount of bits to be encoded. The value range is 1 ~ 8. |
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 n is not in range of 1 ~ 8.
Instruction Behavior
The ENCO and ENCOP instructions behave as follows:
- Up to 256 bits can be encoded.
- This is equivalent to 16 WORDs.
- The result of the encoding is an 8-bit integer.
- The location value of the most significant bit set (bit value is 1) is saved.
Ladder Diagram Examples
ENCO
The ENCO instruction encodes 2n bits starting at the value S and saves the location value of the most significant bit set in an assigned WORD data register, D.
When the contact, M0.0 is ON (1), the instruction encodes 25 bits of the data register, D10, and stores the result in D13.
Memory Monitor
ENCOP
The ENCOP one-shot instruction encodes 2n bits starting at the value S and saves the location value of the most significant bit set in an assigned 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 encodes 25 bits of the data register, D15, and stores the result in D18.
Memory Monitor
