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HomeResourcesModbus GlossaryLittle-Endian (DC BA / DCBA)
EncodingModbus Term

Little-Endian (DC BA / DCBA)

The least significant byte is in the lowest address — reversed from network order.

Definition

In little-endian byte order (DC-BA), both registers and bytes are reversed. The least significant word occupies the lower register address, and within each register the least significant byte is in the high position. Example: FLOAT32 200.0 becomes Reg0=0x0000 Reg1=0x4843. This order is least common in industrial devices but does appear in some PLCs.

Quick Facts

Also calledDC-BA, DCBA, 0123
LSWLower register
200.0 float32Reg0=0x0000 Reg1=0x4843

Related Terms

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ModPackQT Modbus Glossary · Updated 2026