Initial Start Sequence
Once the application download is completed, the system starts following this sequence:
The time stamping modules get their configuration from the PLC.
The time stamping modules synchronize their internal time with the time reference.
The time stamping modules start to detect discrete value changes once the SCADA server is started and connected.
An initial start SOE sequence takes place as described in the following topic.
Initial Start SOE Sequence
Initial start SOE sequence description:
Signalization of the beginning of an uncertain sequence of events (see following table, sequence number 1).
Storage of the values of the time stamping module inputs and outputs with
TimeQuality = ClockFailure and ClockNotSynchronized
until the internal time is synchronized (see following table, sequences number 2 and 3).Storage of the other values of the time stamping module inputs and outputs with
TimeQuality = TSInit
after time synchronization (see following table, sequences number 4 and 5).Signalization of the end of the uncertain sequence of events (see following table, sequence number 6).
Normal time stamping after start of the SCADA server (see following table, sequences number 7 and 8).
Signalization of a new
SOE_UNCERTAIN
sequence due to the start of the SCADA server (see following table, sequences number 9 to 14).
The following table presents the initial start SOE sequence provided by a BMX CRA 312 10 time stamping module with 3 time stamped inputs and 1 time stamped output:
Sequence Number |
Event |
Event Value |
TimeStamp |
|
---|---|---|---|---|
1 |
(0 -> 1) |
1 |
Internal CRA time (not synchronized) |
and |
2 |
CRA INPUT 1 (1 -> 0) |
0 |
Internal CRA time (not synchronized) |
and |
3 |
CRA INPUT 2 (0 -> 1) |
1 |
Internal CRA time (not synchronized) |
and |
4 |
CRA INPUT 3 (0 -> 1) |
1 |
Internal CRA time |
|
5 |
CRA OUTPUT 4 (1 -> 0) |
0 |
Internal CRA time |
|
6 |
(1 -> 0) |
0 |
Internal CRA time |
Time Resolution = 1 ms |
7 |
CRA INPUT 1 (0 -> 1) |
1 |
Internal CRA time |
Time Resolution = 1 ms |
8 |
CRA INPUT 3 (1 -> 0) |
0 |
Internal CRA time |
Time Resolution = 1 ms |
9 |
(0 -> 1) |
1 |
Internal CRA time |
Time Resolution = 1 ms |
10 |
CRA INPUT 1 (2.) (1 -> 0) |
0 |
Internal CRA time |
Time Resolution = 1 ms |
11 |
CRA INPUT 2 (2.) (1 -> 0) |
0 |
Internal CRA time |
Time Resolution = 1 ms |
12 |
CRA INPUT 3 (2.) (0 -> 1) |
1 |
Internal CRA time |
Time Resolution = 1 ms |
13 |
CRA OUTPUT 4 (2.) (0 -> 1) |
1 |
Internal CRA time |
Time Resolution = 1 ms |
14 |
(1 -> 0) |
0 |
Internal CRA time |
Time Resolution = 1 ms |
1. 2. The duplicated |