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Modbus is a communication protocol which is based on the master-slave architecture. To transfer the data, it uses the interfaces such as RS-485, RS-422, RS-232 (Modbus RTU protocol), and also Ethernet of TCP/IP network (Modbus TCP protocol).

Modbus Device is the automation system device (controller, sensor, operating mechanism) supporting the Modbus protocol.

Modbus Register is the Modbus protocol data type.

Modbus Rule is the ACFA-Intellect microprogram used for processing the BACnet property settings.

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