Specifications

Allen-Bradley DF1 Driver Help

Data Types Description

Data Type Description

Boolean Single bit

Byte Unsigned 8 bit value

bit 0 is the low bit

bit 7 is the high bit

Char Signed 8 bit value

bit 0 is the low bit

bit 6 is the high bit

bit 7 is the sign bit

Word Unsigned 16 bit value

bit 0 is the low bit

bit 15 is the high bit

Short Signed 16 bit value

bit 0 is the low bit

bit 14 is the high bit

bit 15 is the sign bit

DWord Unsigned 32 bit value

Long Signed 32 bit value

BCD Two byte packed BCD, four decimal digits

LBCD Four byte packed BCD, eight decimal digits

Float 32 bit IEEE Floating point

String Null terminated character array

Note: The DWord, Long and LBCD data types are not native to any of the PLC models.

When referencing a 16 bit location as a 32 bit value, the location referenced will be the low word, and the next

successive location will be the high word. For example, if N7:10 selected as a DWord data type, N7:10 would be

the low word and N7:11 the high word.