NOVUS V1.5x A - Manual (Page 25)

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RS485 INTERFACE CONFIGURATION
Next configuration screen is the RS485 Interface screen. On this screen, you should choose the type of behavior of this
interface: whether it will be a Modbus RTU slave, a Modbus RTU master or it shall not be used at all. It is recommended
to disable the interface if it is not used.
When it is used as a slave, you must configure your Modbus address, the baud rate, parity and number of stop bits.
When it is used as a master, it is not necessary to configure the Modbus address (only valid for the slaves). Moreover, in
this case, the configuration of Modbus network, where it says which registers are read from what slaves, will be carried
through later on, on the Remote Channels screen.
Interface RS485