We will start with an overview of Modbus that is pertinent to both the ASCII and RTU implementations of the protocol. This article is meant to be an advanced Modbus ASCII tutorial. There are two main styles of transmission that are used when employing the Modbus protocol. Its simplicity and the fact that manufacturers can incorporate it into their products at no charge has helped it become the most popular method of connecting industrial electronic devices. Modbus is an open protocol that supports serial devices that use the RS232/RS485/RS422 protocols. It was originally designed to be used with the company’s programmable logic controllers (PLCs). Modbus is a serial communication protocol developed by the Modicon corporation in 1979. How do you convert Modbus ASCII to the Modbus RTU protocol?.What is the difference between Modbus ASCII and RTU?.How to test Modbus ASCII communication?.
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