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How to establish Modbus communication between Twido controller and Zelio Logic with Modbus Extension SR3MBU01BD.

It is possible to establish Modbus communication between a Twido controller and Zelio Logic with Modbus extension SR3MBU01BD.
In this communication, user have to remember that Zelio logic relay SR3 series(24VDC Supply)+ Modbus extension SR3MBU01BD
will always act as Slave(Server) on Modbus(RTU) network and Twido Controller will be the Master on modbus network).
Refer to attached file for complete procedure with sample programs.
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