6-8
6.6: Waveform Trigger Log Format
QThe Waveform Trigger Log stores records in response to High Speed Limit Triggers. It records
descriptive information about records in the Waveform Samples Log.
QRecord Format: ARecord contains 256 Bytes.
•The first eight bytes in each record is the Trigger Time Stamp, representing the time of the last
sample of the triggering cycle. The format of the Time Stamp is:
Byte Format Range Description
0 binary 0 – 99 century
1 binary 0 – 99 year
2 binary 1 – 12 month
3 binary 1 – 31 day
4 binary 0 – 23 hour
5 binary 0 – 59 minute
6 binary 0 – 59 second
7 binary 0 – 100 centisecond
Note: This log does not record records during Test Mode.
•The next 48 bytes are 12 4-byte MSB signed integers representing the RMS values recorded in
the triggering cycle. The order of these readings is:
VAN
VBN
VCN
VAUX
IA
IB
IC
IAUX
IN
VAB
VBC
VCA
There are currently five hookups available, where the following RMS values are computable in each:
3 Element Wye VAN, VBN, VCN, IA, IB, IC, IAUX
3 CT Delta IA, IB, IC, IAUX, VAB, VBC, VCA
2 CT Delta IA, IC, IAUX, VAB, VBC, VCA
2-1/2 Element Wye VAN, VCN, IA, IB, IC, IAUX
Broken Delta VAN, VBN, VCN, IA, IB, IC, IAUX, VAB, VBC, VCA