Table 5.12, Preset single register packet structure, Table 5.13 – RLE LD2100 V.2.6 User Manual

Page 78: Preset multiple registers packet structure, 3 function 06: preset single register, 4 function 16: preset multiple registers

LD2100 User Guide

800.518.1519

Modbus Communication

5.2.3 Function 06: Preset Single Register

To set a LD2100 parameter value, the master must send a Preset Single Register request

packet. The Preset Single Register request packet specifies a register and the data to write to

that register. The register is numbered from zero (40001 = zero, 40002 = one, etc).

5.2.4 Function 16: Preset Multiple Registers

To set multiple LD2100 parameter values, the master must send a Preset Multiple Registers

request packet. The Preset Multiple Register request packet specifies a starting register, the

number of registers, a byte count and the data to write to the registers. The register is

numbered from zero (40001 = zero, 40002 = one, etc).

Table 5.12 Preset Single Register Packet Structure

Preset Register Request Packet

Preset Register Response Packet

Slave Address (1 byte)

06 (Function code) (1 byte)

Data (2 bytes)

Cry Checksum (2 bytes)

Table 5.13 Preset Multiple Registers Packet Structure

Preset Registers Request Packet

Preset Registers Response Packet

Slave Address (1 byte)

16 (Function code) (1 byte)

Start Register (2 bytes)

# of registers to write (2 bytes)

# of registers (2 bytes)

Byte Count (1 byte)

CRC Checksum (2 bytes)

Data (2 bytes)

…

Cry Checksum (2 bytes)