Rockwell Automation T8xxx Trusted Communications Interface - Manual (Page 63)

Trusted
TM
Communication Interface T8151B
Issue 21 Apr 10 PD-T8151B 63
Offset Description
Start of block + 0 HEADER
Start of block + 1 YEAR_MNTH
Start of block + 2 DAY_HOUR_MIN
Start of block + 3 SEC_MSEC
Table 26 Time-stamp Block
The HEADER field is common to both Time-stamp and Variable data blocks. The TYPE bit-field will
always contain the value 1 for Time-stamp blocks. The bit-fields of the HEADER register are defined
as follows:
HEADER Start of block + 0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
RESERVED REASON RESERVED TYPE
Bit-Field Description
REASON 1 = Time-stamp denotes start of SOE event
2 = Time-stamp denotes SOE buffer overflow event.
3 = Time-stamp denotes SOE clear event.
4 = Time-stamp denotes data event.
TYPE 1 = Time-stamp block.
2 = Variable block.
Table 27 Time-stamp HEADER field
The YEAR_MNTH field is valid only for Time-stamp blocks. It contains the year and month values for
the time-stamp.
YEAR_MNTH Start of block + 1
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
YEAR MONTH
Bit-Field Description
YEAR The year value for the time-stamp (0…9999).
MONTH The month value for the time-stamp (1…12).
Table 28 Time-stamp YEAR_MNTH field
The DAY_HOUR_MIN field is valid only for Time-stamp blocks. It contains the day of the month, hour
and minute values for the time-stamp.