View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0010572 | Part 80: UAFX Overview and Concepts [sg.Architecture] | Spec | public | 2025-10-22 14:41 | 2025-11-12 17:20 |
| Reporter | Kenneth Lee | Assigned To | |||
| Priority | normal | Severity | minor | Reproducibility | have not tried |
| Status | assigned | Resolution | open | ||
| Summary | 0010572: Is NTP required for all devices? Check MRs | ||||
| Description | Is NTP required for all devices? Check MRs Note: UAFX Bootstrapping does require NTP, but UAFX Bootstrapping is optional in Mantis. | ||||
| Tags | Action | ||||
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Only specific mentions of requiring NTP (in devices) are related to the bootstrapping user story (User Story 7227). MR7233 - Automation components shall support the latest NTP version. Automation component should support Network Time Security (NTS). A relevant MR for NTP (in devices) is MR8699.
This MR implies the use of an IP-based time synchronization, or having a time server/source in each subnet which seems unrealistic. There are a few options that seem to meet MR8699: NTP (or SNTP), IEEE 1588 Default Profile, OPC UA ResponseHeader TimeStamp (described in https://reference.opcfoundation.org/Core/Part6/v105/docs/6.3) |
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comparison 2025-11-10.txt (1,876 bytes)
+-----------------------+-----------------------------------------+----------------------------------------+ | Protocol/Option | Pros | Cons | +-----------------------+-----------------------------------------+----------------------------------------+ | NTP/SNTP | Widely supported in OS/RTOS, relatively | Service overhead | | | small, <10 ms accuracy for NTP (higher | | | | for SNTP), mature technology, already | | | | part of devices supporting UAFX | | | | bootstrapping | | | | | | | IEEE 1588 Default | <10 us accuracy with hardware | Service overhead, less available | | Profile | timestamping, <1 ms accuracy without, | by default in OS/RTOS, larger | | | mature technology | footprint (than NTP) | | | | | | OPC UA ResponseHeader | Uses OPC UA feature/implementation, | Need Discovery Server on the network, | | TimeStamp | accuracy derived from the Discovery | unclear whether fully managed by the | | | Server | stack or additional logic is necessary | +-----------------------+-----------------------------------------+----------------------------------------+ |
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^ Protocol/Option ^ Pros ^ Cons ^ test |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2025-10-22 14:41 | Kenneth Lee | New Issue | |
| 2025-10-22 14:41 | Kenneth Lee | Tag Attached: Action | |
| 2025-11-10 18:31 | Kenneth Lee | Assigned To | => Kenneth Lee |
| 2025-11-10 18:31 | Kenneth Lee | Status | new => assigned |
| 2025-11-10 21:50 | Kenneth Lee | Note Added: 0023507 | |
| 2025-11-10 22:00 | Kenneth Lee | Note Added: 0023508 | |
| 2025-11-10 22:00 | Kenneth Lee | File Added: comparison 2025-11-10.txt | |
| 2025-11-11 21:50 | Kenneth Lee | Note Edited: 0023507 | |
| 2025-11-12 15:04 | Kenneth Lee | Target Version | C2D Step 1 => |
| 2025-11-12 15:42 | Kenneth Lee | Note Added: 0023528 | |
| 2025-11-12 15:44 | Kenneth Lee | Note Edited: 0023528 | |
| 2025-11-12 17:20 | Kenneth Lee | Assigned To | Kenneth Lee => |
