Adjusting the PTP synchronization timeout only requires two steps. Simply follow the standard rules to ensure stability:
Step 1: Determine the basic parameters and calculate the timeout value
The standard rule for the PTP protocol is: Timeout = 3 × Announce interval. The corresponding values are as follows:
|
Your Acquisition Scenario |
Announce Interval |
Final Timeout |
Configuration Method (by Device Type) |
|
Ordinary Industrial Low-Speed Acquisition (≤50Hz) |
8 seconds |
24 seconds |
Enter 24 seconds directly, or select timeout count = 3 |
|
Medium-High Speed Acquisition (50Hz~1kHz) |
2 seconds |
6 seconds |
Enter 6 seconds directly, or select timeout count = 3 |
|
High-Frequency High-Precision Acquisition (＞1kHz) |
1 second |
3 seconds |
Enter 3 seconds directly, or select timeout count = 3 |
For most ordinary dual-sensor redundancy comparison scenarios, setting it to 24 seconds is sufficient.
Step 2: Specific Operations for Different Devices
For devices that support directly entering the number of seconds: Open the PTP configuration interface and find "Announce". For the "Timeout" option, simply enter the calculated timeout in seconds and save to apply the changes.
For devices configured by timeout count: Most industrial PLCs/PTP devices will ask you to enter the "timeout count." Simply select 3 times, and the device will automatically calculate the timeout period = 3 × Announce interval. No manual calculation is required.
Anomaly Adjustment Solution: If you frequently receive "PTP disconnection and resynchronization" messages after setting the timeout, it indicates significant network jitter. Adjusting the timeout to 4 times the Announce interval (i.e., 32 seconds for normal scenarios) will have almost no impact on synchronization accuracy and can resolve 90% of frequent disconnection issues.
