OPC UA features
Here's an overview to the OPC UA features and when they were implemented into PLCnext Technology:
OPC UA® Server
| Firmware version | 2019.0 LTS |
2020.0 LTS |
2021.0 LTS |
2022.0 LTS |
2023.0 LTS |
2024.0 LTS |
2024.6 | 2025.0 | 2025.6 | 2025.9 | 2026.0 LTS |
2026.6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Data Access – primitive datatypes | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Data Access – arrays and structs | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Data Access – PLC status information | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Data Access – Date & Time data type | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Alarm & Condition – send alarms | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Alarm & Condition – enable/disable alarms | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Alarm & Condition – confirm alarms | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Alarm & Condition – acknowledge alarms | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| File Transfer – access directories and files | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| File Transfer – open, read, write, seek and close files | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Support of GDS push certificate management | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Historical Access* – primitive datatypes | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Historical Access* – get history of a specific time frame | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Historical Access* – cyclic read | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Subscription type – real-time | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Subscription type – direct read | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Information models – basic support | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Certification according to OPC UA® version 1.0.4 | – | – | ✔ (AXC F 2152 with FW 2021.9 only) |
– | – | – | – | ✔ | ✔ | ✔ | ✔ | ✔ |
| Reverse Connect | – | – | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Firmware update via OPC UA® | – | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Project update via OPC UA® | – | – | – | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Support of structured data types | – | – | – | – | – | – | – | – | – | – | – | ✔ |
* OPC UA Historical Access available via file-based configuration only – configuration via PLCnext Engineer will be implemented later
OPC UA® Client
| Firmware version | 2019.0 LTS |
2020.0 LTS |
2021.0 LTS |
2022.0 LTS |
2023.0 LTS |
2024.0 LTS |
2024.6 | 2025.0 | 2025.6 | 2025.9 | 2026.0 LTS |
2026.6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OPC UA® Client – basic support | – | – | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| eUA Client diagnostics | – | – | – | – | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| Redundancy support for RFC 4072R | – | – | – | – | – | – | – | – | – | ✔ | ✔ | ✔ |
OPC UA® Pub/Sub
| Firmware version | 2019.0 LTS |
2020.0 LTS |
2021.0 LTS |
2022.0 LTS |
2023.0 LTS |
2024.0 LTS |
2024.6 | 2025.0 | 2025.6 | 2025.9 | 2026.0 LTS |
2026.6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OPC UA® PubSub – basic support | – | – | – | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
• Published/reviewed: 2026-09-28 ✺ Revision 102 •