5 |
Table 5 - 4. Data Type Conversions (Panel Data Type/PLC)
Legend: |
|
|
|
Byte u | Byte unsigned | MSB | .................... Most Significant Bit |
Word u | Word unsigned |
| (Upper Bit) |
|
| ||
Word s | Word signed | LOB | Low Order Byte |
| (Lower Byte) | ||
|
|
| |
Long u | Long unsigned | HOB | High Order Byte |
|
| ||
LSB | Least Significant Bit |
| (Upper Byte) |
| (Lower Bit) | PDT | Panel Data Type |
|
|
PDT
Bit
Bit
Byte u.
Byte u.
Byte u.
→
←
→
←
→
←
→
←
→
←
Data Type Conversion
No conversion.
No conversion.
The value of Bit is copied to the LSB of WORD. The rest of the bits of WORD are set to 0.
Values higher than 1 are limited to 1.
The LSB of Byte u. is copied to BIT.
The value of BIT is copied to the LSB of Byte u. The rest of the bits of Byte u. are set to 0.
Byte u. is copied to the LOB of WORD. The HOB of WORD is set to 00.
Values higher than 255 are limited to 255.
Byte u. is copied to the LOB of INT. The HOB of INT is set to 0.
Values higher than 255 are limited to 255. Negative values are limited to 0.
→
←
→
←
→
←
→
←
→
←
PLC
BIT
WORD *
BIT
WORD *
INT *
PDT
Word u.
Word u.
Word u.
Word u.
→
←
→
←
→
←
→
←
Data Type Conversion
The LSB of Word u. is copied to BIT.
The value of Bit is copied to the LSB of Word u. The rest of the bits of Word u. are set to 0.
No conversion.
No conversion.
Values higher than 32767 are limited to 32767.
Negative values are limited to 0.
Word u. is copied to the lower word of DWORD. The upper word is set to 0.
Values higher than 65535 are limited to 65535.
→
←
→
←
→
←
→
←
PLC
BIT
WORD *
INT *
DWORD
Chapter 5 PCS Connection Editor | 5 - 13 |
