Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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What is the difference between Modbus ASCII and RTU transmission modes.

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Modbus ASCII :-

MODBUS ASCII/RTU is a master-slave communication system that can accommodate up to 247 slaves in a bus or star network. On a single line, the protocol employs a simplex connection. The communication messages go in two directions on a single line in this manner.

Modbus RTU:-

One of the two transmission modes described in the original Modbus specification is Modbus RTU (Remote Terminal Unit). Modbus RTU and ASCII are the two modes, and they're both meant to work with serial devices that support the RS232, RS485, and RS422 protocols.

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