Campbell CR800 Series - Data Output: Using Data Type NSEC; NSEC Options

Section 7. Installation
198
FlagsBool8(1) = Flags AND &HFF 'AND 1st 8 bits of "Flags" & 11111111
FlagsBool8(2) = (Flags >> 8) AND &HFF 'AND 2nd 8 bits of "Flags" & 11111111
FlagsBool8(3) = (Flags >> 16) AND &HFF 'AND 3rd 8 bits of "Flags" & 11111111
FlagsBool8(4) = (Flags >> 24) AND &HFF 'AND 4th 8 bits of "Flags" & 11111111
CallTable(Bool8Data)
NextScan
EndProg
7.7.8 Data Output: Using Data Type NSEC
Data of NSEC type reside only in final-data memory. A datum of NSEC consists
of eight bytes — four bytes of seconds since 1990 and four bytes of nanoseconds
into the second. Nsec is declared in the Data Type parameter in final storage
output processing instructions
. It is used in the following applications:
• Placing a time stamp in a second position in a record.
• Accessing a time stamp from a data table and subsequently storing it as
part of a larger data table. Maximum(), Minimum(), and FileTime()
instructions produce a time stamp that may be accessed from the
program after being written to a data table. The time of other events,
such as alarms, can be stored using the RealTime() instruction.
• Accessing and storing a time stamp from another datalogger in a PakBus
network.
7.7.8.1 NSEC Options
NSEC is used in a CRBasic program one of the following ways. In all cases, the
time variable is only sampled with a Sample() instruction, Reps = 1.
1. Time variable is declared As Long. Sample() instruction assumes the time
variable holds seconds since 1990 and microseconds into the second is 0.
The value stored in final-data memory is a standard time stamp. See CRBasic
example NSEC — One Element Time Array
(p. 198).
2. Time-variable array dimensioned to (2) and As Long — Sample() instruction
assumes the first time variable array element holds seconds since 1990 and the
second element holds microseconds into the second. See CRBasic example
NSEC — Two Element Time Array
(p. 199).
3. Time-variable array dimensioned to (7) or (9) and As Long or As Float —
Sample() instruction assumes data are stored in the variable array in the
sequence year, month, day of year, hour, minutes, seconds, and milliseconds.
See CRBasic example NSEC — Seven and Nine Element Time Arrays
(p. 200).
CRBasic example NSEC — Convert Time Stamp to Universal Time
(p. 198) shows
one of several practical uses of the NSEC data type.