This is a frozen slot under a client Modbus device (ModbusAsyncDevice, ModbusTcpDevice, or ModbusTcpGatewayDevice). It can contain a table of DevicePollConfigEntrys for specifying device-level polling of points within the device. The Device Poll Config table has two available actions:
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Learn Optimum Device Poll Config — To automatically create child DevicePollConfigEntry components based upon the current collection of Modbus proxy points.
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Clear — To remove all existing child DevicePollConfigEntry components.
For more details, see Device Poll Config.