Communications D - 8Modbus Function Code Details‹ Reading/Holding Register Contents (03H)Read the contents of the storage register only for specified quantities. The addresses must be consecutive, starting from aspecified address. The data content of the storage register are separated into higher 8 bits and lower 8 bits.The following table shows message examples when reading status signals, error details, data link status, and frequencyreferences from the slave 2 Drive.Fig D.6 Function Code 03H Message Example‹ Write In Single Holding Register (06H)Fig D.7 Function Code 06H Message ExampleCommand Message Response Message(During Normal Operation)Response Message(During Error)Slave Address 02H Slave Address 02H Slave Address 02HFunction Code 03H Function Code 03H Function Code 83HStartAddressHigher 00H Data quantity 08H Error code 03HLower 20H 1st storageregisterHigher 00H CRC-16 Higher F1HQuantity Higher 00H Lower 65H Lower 31HLower 04H Next storageregisterHigher 00HCRC-16 Higher 45H Lower 00HLower F0H Next storageregisterHigher 00HLower 00HNext storageregisterHigher 01HLower F4HCRC-16 Higher AFHLower 82HCommand Message Response Message(During Normal Operation)Response Message(During Error)Slave address 01H Slave address 01H Slave address 01HFunction code 06H Function code 06H 80H + Function code 86HRegisterAddressHigher 00H RegisterAddressHigher 00H Error Code 21HLower 01H Lower 01H CRC-16 Higher 82HSettingDataHigher 00H SettingDataHigher 00H Lower 78HLower 03H Lower 03HCRC-16 Higher 98H CRC-16 Higher 98HLower 0BH Lower 0BH
