user manual

DCP200 Profile Controller & Recorder - Product Manual
51-52-25-150, Issue 1 – April 2009 Serial Communications Page 81
Function 06 - Write Single Register
Writes two bytes to a specified word address.
QUERY
Function
Address of Wor
d
Value to write
06 HI LO HI LO
RESPONSE
Function
Address of Word
Value written
06 HI LO HI LO
Note:
The Response normally returns the same data as the Query.
Function 08 - Loopback Diagnostic Test
QUERY
Function
Diagnostic Code
Value
08 HI =00 LO=00 HI LO
RESPONSE
Function
Sub
-
function
Value
08 HI=00 LO=00 HI LO
Note:
The Response normally returns the same data as the loopback Query. Other Diagnostic
Codes are not supported.
Function 16 - Write Multiple Registers (0x10 Hex)
Writes consecutive word (two-byte) values starting at the specified address.
QUERY
Function
1
st
Write
Address
Number of
Words to Write
Number of
Query Bytes
1
st
Query
Byte
2
nd
Query
Byte
etc
Last Query
Byte
10 HI LO HI LO →
RESPONSE
Function
1
st
Word Address
Number of Words
10 HI LO HI LO
Note:
The number of data bytes that can be written in one message is 253 bytes.