Being open, the Modbus communication protocol belongs to the most popular ones. It is widely used at industrial-sector facilities. Most of the time, the protocol is used to establish connection between different equipment units. Its primary purpose is data transmission.
While communication using the Modbus protocol is considered to be reliable, risks of getting errors cannot be fully excluded. Like with any system, one can face an unexpected situation here. We provide information on available error detection tools, error types and error code interpretation.
The Modbus communication standard offers two error check techniques. They are initiated by a master device, while a slave device is responsible for control. Essentially, all messages and each and every byte sent are checked. This can be a parity check or an LRC/CRC check sum.
During the data transmission, the following errors can be detected:
Codes assigned can provide a user details on errors related to data transmission problems. This is why it is important to know how to interpret them. For example, let’s consider the most popular ones:
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