Modbus Communication Programming
(Original Document)
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Subject of this Section
This section describes the programming process used when implementing Modbus communication.
What Is in This Section?
This section contains the following topics:
Available Communication Functions
Modbus Master Communication Function
Modbus Slave Communication Function
Using the SEND_REQ Communication Function
Example 1: SEND_REQ Function with Echo Request
Example 2: SEND_REQ Function with Word Read Request
Example 3: SEND_REQ Function with Bit Read Request
Example 4: READ_VAR Function for Reading Bits
