LSIS S100 - Page 151

139
RS-485 Communication Features
Function Code #03: Read Holding Register
Function Code #04: Read Input Register
Query Field Name
Response Field Name
Station ID Station ID
Function(0x04) Function (0x04)
Starting Address Hi
Byte Count
Starting Address Lo
Data Hi
# of Points Hi Data Lo
# of Points Lo
…
CRC Lo
…
CRC Hi Data Hi
Data Lo
CRC Lo
CRC Hi
Query Field Name
Response Field Name
Station ID
Station ID
Function(0x03)
Function (0x03)
Starting Address Hi
Byte Count
Starting Address Lo
Data Hi
# of Points Hi
Data Lo
# of Points Lo
…
CRC Lo
…
CRC Hi
Data Hi
Data Lo
CRC Lo
CRC Hi
# number of Points
# number of Points