Analysis of the EIA485 Communication in Automatic Control System
The EIA485 standard only defines the communication physical layer.The Modbus/RTU protocol defines the physical link layer and application layer on the EIA485 physical layer.The BACnet/MSTP protocol defines the physical link layer,network layer,and application layer on the EIA485 physical layer,briefly introduces the role of ASN.1 abstract syntax notation in communication encoding and decoding,and provides examples to illustrate the role of network layer in cross network data collection.From EIA485 to Modbus/RTU to BACnet/MSTP,observe how the latest technological achievements continuously improve the development and innovation of automatic control system technology.
automatic control systemEIA485 standardModbus/RTU protocolBACnet/MSTP protocolAbstract Syntax Notation One
NETL
NSTL
万方数据
