How to update CRA/ERT time using CPU time ?
Issue:
How to update the BMxCRA312xx and BMXERT16.4 internal time from the CPU time ?
Product Line:
BMXERT1604, BMxCRA312xx, M580 CPUs
Environment:
EcoStruxure Control Expert V16.2, Windows 10/11
Resolution:
For CPU firmware versions prior to V4.x, the CPU NTP configuration only supports either Client or Server mode.
To update the CRA/ERT time, the CPU must be configured as an NTP Server. In this case, it is possible to synchronize the CPU time with an external NTP server by using, for example, a NOC0311 module, which can connect to the external NTP server and then synchronize the CPU time.
If the CPU is configured as an NTP Client, the CRA/ERT time will NOT be updated.
Starting from Firmware V4.x, we introduced the Server/Client feature on the CPU. This allows the CPU to connect to an external NTP server and synchronize the CRA/ERT time via the RIO network:
The CRA NTP time will then be updated every 20s, allowing the ERT time to be updated also: