Data Suffixes for Tag I/O Addressing

The data type to read from or write to is usually implied by the address. If it is not, the strings shown in the following table may be appended to the address (without spaces) to force the data to be interpreted as a specific type. Not all suffixes apply to all drivers.

Suffix Meaning
/AB3Float Allen-Bradley PLC/3 Floating Point (4 bytes) (Used for Allen-Bradley exclusively)
/AB5Float Allen-Bradley PLC/5 Floating Point (4 bytes) (Used for Allen-Bradley exclusively)
/BCD2 2-digit (1 byte) Binary Coded Decimal
/BCD3 3-digit (2 bytes - lowest 12 bits) Binary Coded Decimal
/BCD4 4-digit (2 bytes) Binary Coded Decimal
/BCD8 8-digit (4 bytes) Binary Coded Decimal
Note: while any driver may use this suffix to read data, only the Modbus Compatibly can use it to write data.
/Bit Attempts to convert the value to a single bit. The bit number used is always 0. (ex: 40001/Bit)
/Double IEEE Double Precision Floating Point (8 bytes)
/Float IEEE Single Precision Floating Point (4 bytes)
/SByte Signed Byte
/SDWord Signed 32-bit Integer.
If used in combination with /Bit, /SDword comes last:
example: 40001/0/SDWord
/SWord Signed 16-bit Integer
/UByte Unsigned Byte
/UDWord Unsigned 32-bit Integer
/UWord Unsigned 16-bit Integer

For example:


Each I/O device uses a different addressing system. Details can be found in the following topics:

Allen-Bradley Driver I/O Addressing

CalAmp Driver I/O Addressing

CIP Driver I/O Addressing

DNP3 I/O Addressing

DriverMUX I/O Addressing

MDS Diagnostic Driver I/O Addressing

Modbus Compatible Device I/O Addressing

Modbus Plus PLC Addressing

Motorola ACE Driver I/O Addressing

Omron I/O Addressing

OPC Client Driver I/O Addressing

Siemens S7 Driver I/O Addressing

SNMP I/O Addressing

Workstation Status Driver I/O Addressing