Table 7-2
Buffer storage control attributes
Storage attribute Description
appendmode The append modes are either off or on. When the append mode is off, a
new measurement to this buffer will overwrite the previous contents.
When the append mode is on, the first new measurement will be stored
at what was formerly rb[n+1]. This attribute is initialized to off when the
buffer is created.
collectsourcevalues When this attribute is on, source values will be stored with readings in
the buffer. This requires 4 extra bytes of storage per reading. This value,
off or on, can only be changed when the buffer is empty. When the buffer
is created, this attribute is initialized to off.
collecttimestamps When this attribute is on, timestamps will be stored with readings in the
buffer. This requires 4 extra bytes of storage per reading. This value, off
or on, can only be changed when the buffer is empty. When the buffer is
created, this attribute is initialized to off.
timestampresolution The timestamp resolution, in seconds. When the buffer is created, its ini-
tial resolution is 0.000001 seconds. At this resolution, the reading buffer
can store unique timestamps for up to 71 minutes. This value can be
increased for very long tests. Note: The minimum resolution setting is
1µs (0.000001 seconds).
Table 7-3
Buffer read-only attributes
Storage attribute Description
basetimestamp The timestamp of when the reading at rb[1] was stored, in seconds from
powerup.
capacity The total number of readings that can be stored in the reading buffer.
n The number of readings in the reading buffer.
Series 2600 System SourceMeters Reference Manual Buffer (Data Store) 7-7
Return to Section 7 topics 2600S-901-01 Rev. A / May 2006
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