PROFINET Acyclic Data
Acyclic communication in PROFINET is handled as a low priority, typically one request at a time, while there is no cyclic communication on the bus coupler. If server device is not able to process an acyclic request right away, it signals the client that the response is delayed. The client waits for the response for a limited duration until the server has been able to process the request. This way, the server can reduce the number of requests it receives, if necessary.
TeSys™ island supports the following sub-slot and index ranges for PROFINET acyclic dataset exchange.
PROFINET Acyclic Data
|
Dataset |
Slot |
Sub-slot |
Index |
| System Diagnostic | 0 | 3 | 1 |
| System Energy 1 | 0 | 3 | 2 |
| System Energy 2 | 0 | 3 | 3 |
| System Asset Management | 0 | 3 | 4 |
| System Combined Output | 0 | 3 | 5 |
| System Time | 0 | 3 | 6 |
| Control | 1–21 | 3 | 0 |
| Energy | 1–21 | 3 | 1 |
| Diagnostic | 1–21 | 3 | 2 |
| Asset Management | 101–121 | 3 | 0 |
The following sections provide the acyclic datasets supported by TeSys™ island and applies to both PROFINET and PROFIBUS.