About CST latching

Use Coordinated System Timer (CST) latching to prevent the Sequence of Events device from overwriting input data after it is timestamped. latching to prevent the Sequence of Events device from overwriting input data after it is timestamped.

When

Latch Timestamp in CST

is enabled in the

Points

view, the device timestamps only a specific number of input transitions (for example, the first transition in CST Per Point mode) and ignores future input transitions until the controller clears the timestamp data already received.

When

Latch Timestamp in CST

is disabled, the device timestamps every input transition and may overwrite previously recorded timestamp data if the controller does not acknowledge the data quickly enough.

In FIFO mode, the Sequence of Events device sends input data for the current event to the controller immediately after the first input transition has been timestamped and at each Requested Packet Interval (RPI).

This feature is set on a device-wide basis and is enabled by default.