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FloBoss™ S600+ Flow Computer Modbus Specification Manual

D301904X012

June 2024

6.3 Function Code 3: Read Output Registers

Function code 03 reads the output registers (Gould/Modicon addresses 40001–49999);

data can be configured at every address.

Poll Format

Address

1 byte

Function 1 byte

Start Item 2 bytes

Num Items 2 bytes

Response Format

Address 1 byte

Function 1 byte

Length 1 or 2 bytes

Note: Length can be 8-bit byte count, 8-bit item

count; 16-bit byte count, or 16-bit item count.

Data item 1 2, 4, or 8 bytes

Data item 2 2, 4, or 8 bytes

…

Data item N 2, 4, or 8 bytes

6.4 Function Code 4: Read Input Registers

Function code 04 reads the input registers (Gould/Modicon addresses 30001–39999); data

can be configured at every address.

Poll Format

Address 1 byte

Function 1 byte

Start Item 2 bytes

Num Items 2 bytes

Response Format

Address 1 byte

Function 1 byte

Length 1 or 2 bytes

Note: Length can be 8-bit byte count, 8-bit item

count, 16-bit byte count, or 16-bit item count.

Data item 1 2, 4, or 8 bytes

Data item 2 2, 4, or 8 bytes

Emerson FloBoss S600+ Specification Manual

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