Set time (time synchronization)
A description of this resolution:
- There are two possible methods for ensuring that the affected stations register the new time:
1. Subsequently setting the time manually via the system dialog
Setting the time in the system manually is possible from any station capable of dialog that is entered by the Master Station as the coordinator or it can be done by the Master Station itself. The new time is then circulated to all the stations in the system. This is accompanied by a reset over all the stations which means that for a short time they cannot be operated. The screens go dark and come back with the same display as before. After approx. 5-7 seconds operability returns to the operator level.
Set the time via the menu option TIME in the system dialog. Set the desired new time which is registered by the system once confirmed. Confirming the suggested time that is already in the dialog does not lead to a changed time in the system.
The time of the confirmation should be between the 50th and the 55th second relative to the time on the station controlling the time.
If after this manual intervention there is no reset logged for all stations, repeat the procedure. Successful intervention will result in a good message (successful adjustment of time difference) being logged for the date/time deviation for the affected stations.
System with radio clock coupling
If the time set manually deviates by more than 9 seconds from the time on the station controlling the time (station with radio clock coupling), the result is another firm alteration when the next time telegram is sent from the radio clock to transfer the minutes. This is accompanied by another reset over all the stations. To avoid this, confirm the time set manually at the moment when the time agrees with the time on the station controlling the time.
The difference between these times is then minimal and the system can make its gradual adjustment.
2. STOP/START on the relevant station via the system dialog
STOP/START must be carried out for each affected station. The station is stopped and started by another station via the system dialog. In this procedure the affected station registers the time on the station controlling the dialog.
When network couplers are stopped, the measured value connections are disconnected via the L-bus and re-connected during the start. The STOP/START procedure must only be carried out when the status of the system is not time-critical. When the system is running, proceed as under Point 1.
'Set time (time synchronization)' resolves the following:
- Operator Station
Once the time has been set via the radio clock or manually, the set time value is not registered by all stations.
The time on the system was altered firmly. This happened either manually via the system dialog TIME or controlled by the radio clock if the station controlling the time recognises a time deviation between the system and the radio clock of more than 9 seconds (e.g. changing from summer to winter time). Firm alteration to the time is always linked to a reset over all the stations. A reset carried out on the station is labelled in the system error protocol by the following entries:
4 Time mark station STATION STOP/POWER FAIL. Fault status
4 Time mark station STATION READY Fault status
If, following a firm time alteration, the new time is not registered by all the stations, this is displayed for each affected station by the following error message in the system error protocol:
+ 4 Time mark station DATE/TIME INCOMP. Fault status
In addition the affected stations have not carried out a reset, so the entries mentioned above are missing in the system error protocol.
The time on the affected stations is then adjusted gradually (in a ratio of 1:100) until it conforms with the station controlling the time.
The underlying cause is:
- Aborted setting procedure in the underlayed stations