Initial Start After Application Download

After the application download, each time stamping module:

  • Gets its configuration from the PLC.

  • Events remaining in the time stamp source module before the application download are deleted if the time stamping application is different.

  • Synchronizes its internal time with the time reference (GPS clock, DCF77 or NTP server).

  • Stores time stamping events on declared I/O value changes.

NOTE: While the clock is not synchronized, stamped events are marked with a CLOCK_NOT_SYNC or CLOCK_FAILURE parameter.

Power Down/Up of a Time Stamping Module

The following sequence describes the steps followed on a time stamping module power up, after a power down while the system is running correctly with the time stamping module working properly and without application changes:

  • Time stamping module gets its configuration from the PLC.

  • Time stamping module synchronizes its internal time with the time reference (GPS clock, DCF77 or NTP server).

  • Time stamping module stores time stamping events.

  • Events stored in the time stamping source module buffer before the power up are read by the PLC with the execution of GET_TS_EVT_X function block.

    NOTE: In a BMX CRA 312 10 module, events before power up may be cleared if such a behavior is configured.
NOTE: While the clock is not synchronized, stamped events are marked with a CLOCK_NOT_SYNC or CLOCK_FAILURE parameter.