Data access from OPC UA to the logic is not synchronised with the PLC cycle

Question:
Does OPC UA read the data at the beginning and write the data at the end of the PLC cycle - simliar to the fieldbus behavior?

Answer:
From an OPC UA perspective, there is no "input" and "output" image of the PLC task, which is familiar from EtherCAT or PROFINET, for example.






URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/202400148/1/
Meta data
Taxonomy: Controller p500 , Controller p300 , Controller c300 , Controls-Controllers , Controller c520 , Controller c550 , Controller c500 , Controller c430 , Controller c400 , System
AKB-ID: 202400148
Last update: 2025/05/27
Category: FAQ, Tips and Tricks

Lenze reserves the right to change information on this page at any time. Any liability for the accuracy of the information is excluded.
Contact form