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 binary DWORD data registers or constants. This is the value to convert. The signed value range is -2,147,483,648 ~ 2,147,483,647 (232). The unsigned value range is 0 ~ 4,294,967,295 (232-1). The Hexadecimal value range is H00000000 ~ HFFFFFFFF. |
| D | The second operand. Entries are only REAL data registers. This is where the conversion 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 converting S exceeds the value range of the data register D.
Signed Overflow
DWORD data register entry behaves as follows:
- If the value of D exceeds the smallest signed value -2,147,483,648, the value will be set to -2,147,483,648 with no warning.
- If the value of D exceeds the largest signed value 2,147,483,647, the value will be set to 2,147,483,647 with no warning.
Ladder Diagram Examples
DFLT
The DFLT instruction converts a binary DWORD value, S, into a REAL value and saves the conversion in an assigned REAL data register, D.
When the contact, M4.0, is powered ON (1), the value of the DWORD data register, D90, 123,456,789, is converted into float notation. The value of the conversion, 123,456,789.000000, is saved in the REAL data register, D93.
Memory Monitor
DFLTP
The DFLTP one-shot instruction converts a binary DWORD value, S, into a REAL value and saves the conversion in an assigned REAL data register, D. Every time this instruction executes, it energizes the output only once.
When the contact, M4.1, is powered ON (1), the value of the DWORD data register, D96, -563,125, is converted into float notation. The value of the conversion, -563,125.000000, is saved in the REAL data register, D99.
Memory Monitor
