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 4-digit binary coded decimal (BCD) data registers or constants. This is the value to be converted to ASCII WORD data registers. This is where the conversion is saved. The result will require 2 WORD data registers. |
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 processing exceeds the data register assigned to D.
Instruction Behavior
The BCDDA and BCDDAP instructions behave as follows:
- The ones digit of the conversion result is stored in the upper BYTE of the data register D+1.
- H20 is stored in the destination data register for the leading zeros of valid digits.
Ladder Diagram Examples
BCDDA
The BCDDA instruction converts a 4-digit binary coded decimal (BCD) value, S, into ASCII code. The conversion result is saved in 2 assigned WORD data registers starting at the data register, D.
When the contact, M4.0, is powered ON (1), the BCDDA instruction converts the value of the BCD data register, D100, into ASCII code.
The result of the conversion is saved in two ASCII data registers, D102 and D103.
Memory Monitor
BCDDAP
The BCDDAP one-shot instruction converts a 4-digit binary coded decimal (BCD) value, S, into ASCII code. The conversion result is saved in 2 assigned WORD data registers starting at the data register, D. Every time this instruction executes, it energizes the output only once.
When the contact, M4.5, is powered ON (1), the BCDDAP instruction converts the value of the BCD data register, D105, into ASCII code.
The result of the conversion is saved in two ASCII data registers, D107 and D108.
Memory Monitor
