Title: DOCA0005EN-12.pdf
Communication with the device has been established.NOTE: If there is an error online, the LED also flashes.The LED is offThere is no active communication between the master and the slaveRelated topicsFor more information on the Modbus protocol, see the Modbus organization website at www.modbus.org.For more information on the Modbus protocol, see the Modbus organization website at www.modbus.org.See “Meter sealing points” on page 17 for the location of the communications LED.DOCA0005EN-1247Modbus functionsFunction listTable format48iEM3000 series user manualThe table below lists the supported Modbus functions:Function codeFunction nameDecimalHexadecimal30x03Read Holding Registers160x10Write Multiple Registers43/140x2B/0x0ERead Device IdentificationFor example:To read different parameters from the meter, use function 3 (Read).To change the tariff, use function 16 (Write) to send a command to the meter.