Timestamp Distributed Clocks

The terminal transfers the time of the voltage zero crossing as timestamp to objects 0x6006:12 (channel 1), 0x6016:12 (channel 2) or 0x6026:12 (channel 3), if the corresponding indices 0x1A04, 0x1A0E or 0x1A18 are enabled.

Notice

Combination of an Embedded PC of the CX70xx series with the EL344x

With the above combination a distributed clock jitter must be assumed, which depends on the application, the number of EtherCAT devices and the task time. The distributed clock jitter leads to an additional measurement uncertainty of the phase angle, which affects the ratio of active and reactive power.

The user must decide whether the measurement uncertainty is sufficient for the application. Beckhoff can only point out that the distributed clock jitter in the CX70xx increases the measurement uncertainty and therefore no longer corresponds to the technical data of the terminal.