Accuthermo Technology Corp.
14
Write Process Example:
During the write process the response bytes should match the command set.
Master ask the controller to set the SV temperature at 55.0
℃
1
2
3
4
5
6
7
8
Represent
ID
R/W Function
Parameter Address
Data
CRC
Byte Count
1
1 bytes
2 bytes
2 bytes
2 bytes
x01
x06
x0000
x0226
xCCCC
Response from the controller
1
2
3
4
5
6
7
8
Represent
ID
R/W Function
Parameter Address
Data
CRC
Byte Count
1
1 bytes
2 bytes
2 bytes
2 bytes
x01
x06
x0000
x0226
xCCCC
Read Process Example:
During the read process, you can ask for one data back, or you can ask a set of data back in
sequence. The byte 3-4 is the initial parameter address. The byte 5-6 is to tell slave how many
consecutive data you want. The following example only asks for one data.
The master ask the controller to read current temperature (PV value)
1
2
3
4
5
6
7
8
Represent
ID
R/W Function
Parameter Address
Data Cnt
CRC
Byte Count
1
1 bytes
2 bytes
2 bytes
2 bytes
x01
x03
x1000
x0001
xCCCC
In the response data set, the byte 3-4 is the byte count of the data return. The following example is
the response data from above command. The byte 3-4 tell the master it has 2 bytes of data. The
content of the return data is at byte 5-6.
Response from the controller (measured 28.7
℃
)
1
2
3
4
5
6
7
8
Represent
ID
R/W Function
Byte Count
Data Rtn
CRC
Byte Count
1
1 bytes
2 bytes
2 bytes
2 bytes
x01
x03
x0002
x011F
xCCCC
Note: Byte Count value =2 x Data Count value
