To use any of the NiagaraAX Modbus drivers, you must have a target NiagaraAX host (JACE) that is licensed with the corresponding feature(s). These include the following:
modbusAsync — For ModbusAsyncNetworks (serial Modbus RTU or ASCII over RS-485 or RS-232)
modbusSlave — For ModbusSlaveNetworks (serial Modbus RTU or ASCII over RS-485 or RS-232)
modbusTcp — For ModbusTcpNetworks and/or ModbusTcpGateways (Modbus TCP via Ethernet)
modbusTcpSlave — For ModbusTcpSlaveNetworks (Modbus TCP via Ethernet)
In addition, note that other limits on devices and proxy points may exist in your license.
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