The invention relates to a
Modbus protocol conversion device based on 3G (The 3rd Generation Telecommunication)
Internet access, belonging to a protocol conversion device in the technical field of Internet. Aiming at the instable problem of 3G dial-up access, in order to ensure the
correctness and transparency of
data transmission during
Modbus protocol conversion, the invention adopts the
Modbus protocol conversion device based on 3G
Internet access. A remote
server, a protocol conversion device and
data acquisition equipment are needed for hardware architectures. A 3G script completes dial-up access, and a PPP (
Point to Point Protocol) automatically detects the network. When
the Internet is turned off or a Ping (Packet Internet Groper) is illogical, automatic redial is conducted. Data communication between the protocol conversion device and the
server adopts a Modbus TCP (Terminal Control Protocol), and data communication between the protocol conversion device and the
data acquisition equipment adopts a Modbus RTU (
Remote Terminal Unit) protocol. Transparent
data transmission is realized, the protocol conversion device can quickly detect abnormal disconnection of
the Internet and automatically connect
the Internet to ensure stable and lasting operation, and the protocol conversion device can be used in more environments.