DigiTrace TCONTROL-CONT-03 - Structure of the Data Blocks

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2 Protocol description

2.5 Structure of the data blocks

All data blocks have the same structure:

Data structure

Each data block contains four fields:

Slave address device address of a specific slave

Function code function selection (read, write words)

Data field contains the following information:

- word address

- number of words

- word value(s)

Checksum detection of transmission errors

Slave

address

Function

code

Data field Checksum

CRC16

1 byte 1 byte x byte 2 bytes