Question: I want to specify a bit in a word, but am unsure of the suffix to use.
A: Each RTU or PLC has its own addressing scheme. The appropriate entry for any I/O tag's "Address" property is directly related to the type of I/O device configured in the tag's "I/O Device" property, and is typically a text value representing the address in the native form of the I/O device.
The data type to read or write is usually implied by the address. If it is not, the strings below may be appended to the address, separated by one or more spaces, to force the data to be interpreted as a specific type:
|
Suffix |
Meaning |
|
Suffix |
Meaning |
|
/AB3Float |
Allen-Bradley PLC/3 Floating Point (4 Bytes) |
|
/Float |
IEEE Single Precision Floating Point (4 Bytes) |
|
/AB5Float |
Allen-Bradley PLC/5 Floating Point (4 Bytes) |
|
/SByte |
Signed Byte |
|
/BCD2 |
2-digit (1 Byte) Binary Coded Decimal |
|
/SDWord |
Signed 32-bit Integer |
|
/BCD3 |
3-digit (2 Bytes – lowest 12 bits) Binary Coded Decimal |
|
/SWord |
Signed 16-bit Integer |
|
/BCD4 |
4-digit (2 Bytes) Binary Coded Decimal |
|
/UByte |
Unsigned Byte |
|
/Bit |
Bit (as a number. ex: 40001/1) |
|
/UDWord |
Unsigned 32-bit Integer |
|
/Double |
IEEE Double Precision Floating Point (8 Bytes) |
|
/UWord |
Unsigned 16-bit Integer |
Detailed information on different addressing schemes can be found in the sections listed below: