Manual

User manual/ Technical information

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4 Communication Protocols

The device supports the following communication protocols:

Modbus-RTU

The Modbus protocol is a common language applied to

electronic devices. With this protocol, devices can communicate

within their network. It has become a universal industry standard,

widely used in data loggers, sensor equipment, and so on. Based on

this protocol, devices produced by different vendors can

communicate with each other for system integration.

The Modbus protocol is a master-slave protocol. One node is the

host, and the other nodes that use the Modbus protocol to join the

communication are the slave. Each slave has a unique address.

ASCII

The ASCII protocol is a query-response or a question-and-answer

communication protocol in which a host PC uses ASCII characters to

send commands to a device and then receives responses from that

device.

SDI-12

Single-bus-based data communication protocol， is an

asynchronous serial communications protocol for intelligent sensors

that monitor environment data.