AMPTRON Ai205 - Introducing Modbus Protocol

Introducing Modbus Protocol
The Modbus RTU protocol is used for communication in Ai205. The data
format and error check method are defined in Modbus protocol. The half duplex
query and respond mode is adopted in Modbus protocol. There is only one
master device in the communication net. The others are slave devices, waiting
for the query of the master.
Transmission mode
The mode of transmission defines the data structure within a frame and the
rules used to transmit data. The mode is defined in the following which is compatible
with Modbus RTU Mode*.
Modbus is trademark of Modicon, Inc.
62
Coding System
Start bit
Data bits
Parity
Stop bit
Error checking
8-bit binary
1
8
no parity
1
CRC check
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