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2 Protocol overview
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2
Protocol overview
2.1
Modbus TCP
The Modbus protocol is the typical means of transfer with TCP / IP and commonly used to
connect industrial electronics. Simple and robust, it has become the de facto standard
communication protocol and is currently used to connect industrial electronics.
ARIO-C-MT, Modbus TCP-Based Coupler, synchronizes the data of all connected I / O modules
with Modbus TCP. The coupler determines the physical structure of the node and automatically
creates a local process image of all the I / O. It also includes a mixed arrangement of analog
(word) and digital (byte) modules.
The process image consists of the input and output data area.
2.2
Basic memory map of field network
The memory map is based on the addressing system of Autonics.
2.2.1
Data Register Summary
Address
Type Description
Initial
Value
Function Register
04 0101~0114 R Read the product data
04 1024~0126 R Read the product state data
04 1034~1087 R Read the product settings
04 2001~2256 R Read the input data
04 2513~xxxx R Read the diagnostic data
03/06/16 1034~1087 R/W Read and write the product settings
03 2001~2256 R Read the output data
06/16 2001~2256 W Write the output data
2.2.2
Data Register
Accessible data register area via the input register and holding register
Address
Type Description
Initial
Value
Function Register
04 2001~2256 R Input Data
03/06/16 2001~2256 R/W Output Data
04 2513~xxxx R Diagnostic Data
The minimum data size is treated as 1 byte unit based on the module information.