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A Point Number is an index into the Communication Table.
Example: Point Number 1 is for the second entry in a Line. Line Number 11, Point Number 1 is the
second in the twelfth line, 0.1 second V
BN
. Data Pointers with Point Numbers greater than the number of
points for the line are ignored.
Q
Record Format: A Record contains 16, 32, 64, 128 or 256 bytes, depending on how many channels
have limits assigned to them.
• The first eight bytes in each record is the Time Stamp. 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 remaining bytes are the values monitored by Limits (45077-45204). If the first Data Pointer
is requesting V
BN
, a 4 byte value, then the next 4 bytes in the record is V
BN
. This continues, Data
Pointer for Data Pointer, until all Data Pointers have been satisfied, or the number of bytes is
equal to the Historical Log 1 Record Size.