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Rev. G
Section 8.3: Modbus Setup
Modbus Theory of Operations:
Modbus RTU is a Single Master, but multiple slave protocol that is always a
poll/response where the master sends a poll request and nothing else happens until the
slave responds or a timeout setting is reached. Modbus TCP simply updated the
protocol to work over TCP/IP Ethernet and added the ability to have multiple masters
polling slave devices.
1. After adding the Protocol per the Add Protocol section, click the second level
of the protocol.
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