Preset Single Register (Function 6)
The Preset Single Register function can be used to access the output process image or the flag process image (only at the controller) and the Modbus TCP interface.
The first analog output is written with function 6. The analog outputs start at an offset of 0x0800. Here again the offset always describes a word. This means offset 0x0803 refers to the fourth word in the output process image.
Query
|
Byte Name |
Example |
|---|---|
|
Function code |
6 |
|
Start address high |
8 |
|
Start address low |
0 |
|
Data high |
63 |
|
Data low |
255 |
The Fieldbus Coupler replies with the same telegram and confirmation of the received value.
Response
|
Byte Name |
Example |
|---|---|
|
Function code |
6 |
|
Start address high |
8 |
|
Start address low |
0 |
|
Data high |
63 |
|
Data low |
255 |