Name: CRE Technology GENSYS 2.0
Brand: CRE Technology
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A53 Z0 9 0020 L En Technical documentation

Chapter : Communication

187

3/ Modbus communication example:

Table below gives an example of a MODBUS master sending a reading request (function 04) of 3 registers

starting from variable E0007. This request is sent to a GENSYS 2.0 setup as slave number 5.

MODBUS RTU request/answer example

Master request

GENSYS 2.0 slave answer

Field

Value

Field

Value

Slave address

Function request

Function

Starting register (MSB)

Data bytes (=2*Number of requested registers)

Starting register (LSB)

Value of register E0007 (MSB)

Number of registers (MSB)

Value of register E0007 (LSB)

Number of registers (MSB)

Value of register E0008 (MSB)

CRC16 (MSB)

Value of register E0008 (LSB)

CRC16 (LSB)

Value of register E0009 (MSB)

Value of register E0009 (LSB)

CRC16 (MSB)

CRC16 (LSB)

Table 77 - Modbus communication example

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CRE Technology GENSYS 2.0 Specifications

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