The Function Code (read Analog Output Holding Registers) 006B: The Data Address of the first . The Function Code (Preset Multiple Registers, hex – ) 0001: The Data Address of the first register. The Function Code (read Input Status) 00C4: The Data Address of the first input to read.

Chex = 1, + 100offset = input #101) 0016: The total . Sub-function codes supported by the serial line devices. The type of register being addressed by a Modbus request is determined by the function code. The most common codes are for read holding registers, and .

Since Modbus protocol is just a messaging structure, it is independent of the. For example, function code will request the slave to read holding registers and . The second parameter in each Modbus message is the function code. This defines the message type and the type of action required by the slave.

Modbus functions operate on register map registers to monitor, configure, and. The leading character is generally implied by the function code and omitted . Most SCADA Integrators and users of modbus are familiar with the. Specific devices treat the function codes differently on the front-end. The message structure of the Modbus RTU function codes is employed and standard IEEE 32-bit floating .

Along with the slave address, the Modbus function code is another piece of data that is in. Data can be retrieved via the Modbus function code 03. For function codes where the request and response are of fixed length, the . The Modbus PDU format is defined as a function code followed by an associated set of data.

The size and contents of this data are defined by . MODBUS is a confirmed service protocol and offers many services specified by function codes. MODBUS function codes are elements of MODBUS .