Preen AFV+ Series - 5.2 Read Register Command Format

AFV
+
Series High Power Programmable AC Power Supply
5-91
5.2 Read Register Command Format
5.2.1 Read Register Command Format
Slave Address
Function
Code
Start
Address
Number of
Addresses
CRC16
DevAddr
Func
StartAddr
Num
CRC_H CRC_L
 Byte1 (Device Address)：0x02 (Editable)
 Byte2 (Function Code)：0x03（Read multiple register addresses）
 Byte3,4 (Start Address)：Start reading register address (Refer to section 5.4)
 Byte5,6 (Number of Addresses)：The number of register addresses plan to read
 Byte7,8 (CRC6)：CRC16 checksum of Byte1 to Byte6 (Refer to section 5.5)
5.2.2 Read Register Successfully Answer Format
Slave
Address
Function
Code
Byte Count
Data
CRC16
DevAddr
Func
ByteCount
{dat1..;datN}
CRC_H CRC_L
 Byte1 (Device Address)：0x02 (Range：1-32)
 Byte2 (Function Code)：0x03 (Read multiple register addresses)
 Byte3 (Number of Addresses)：The number of register addresses plan to read
 Byte4 to N (Data)：Read Data Content
 Byte N+1，N+2 (CRC16)：CRC16 checksum of Byte1 to ByteN (Refer to section 5.5)