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 | ✓ | – | ✓ | ✓ | ✓ | – | – | – | – | ✓ | – | ✓ | ✓ | ✓ | – |
Supported Flags
| Flag | Bit | Support |
|---|---|---|
| Error | F11.0 | ✓ |
| Zero | F11.1 | – |
| Carry | F11.2 | – |
Number of Steps
| Steps |
|---|
| 3 |
Operands
| Operand | Description |
|---|---|
| S | The first operand. Entries are REAL data registers or constants. This is the value to square root. The REAL value range is 1 ~ 2128 (1 ~ 3.4028237e+38). |
| D | The second operand. Entries are only REAL data registers. This is where the square root is saved. |
Float Representation
| Mantissa | Exponent | Sign |
|---|---|---|
| Bit 0 ~ Bit 22 | Bit 23 ~ Bit 30 | Bit 31 |
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 the calculation exceeds the data register assigned to S or D. When the value assigned to S exceeds its range, the value, Infinity (1.#INF00), is stored in the data register D.
Input Parameter
The value of S can only be a positive number. Bit 31 of S must always be 0.
Ladder Diagram Examples
SQR
The SQR instruction calculates the square root of the REAL value, S, and saves the result in an assigned REAL data register, D.
When the contact, M0.9, is ON (1), the instruction takes the square root of the value, 60.123402, into the resulting radian value, 7.753928.
Memory Monitor
SQRP
The SQRP one-shot instruction calculates the square root of the REAL value, S, and saves the result in an assigned REAL data register, D. Every time this instruction executes, it energizes the output only once.
When the contact, M1.0, is ON (1), the instruction takes the square root of the value, 57.135132, into the resulting radian value, 7.558778.
Memory Monitor
