Campbell Scientific LoggerNet Datalogger Support Software - Manual (Page 489)

Appendix A. Glossary of Terms
Modem – From “modulator-demodulator”; a device used to transmit and
receive digital data over normally analog communications lines, such as an
audio signal on telephone circuits. A modem attached to a computer performs
a digital-to-analog conversion of data and transmits them to another modem
that performs an analog-to-digital conversion which permits its attached
computer to use the data.
N
Net Description – Description of dataloggers and communications devices that
form the datalogger network. Created using the EZWizard in PC400 or Setup
Screen in LoggerNet to communicate with the various dataloggers.
Node – Part of the description of a datalogger network. Each node represents a
device that the communications server will dial through or communicate with
individually. Nodes are organized as a hierarchy with all nodes accessed by
the same device (parent node) entered as child nodes. A node can be both a
parent and a child node.
O
ObjSrlNo – This entry in the status table provides the revision number of the
datalogger PROM.
Output Interval – The output interval is the interval at which the datalogger
writes data to Final Storage. The output interval is defined by Instruction 84 in
Edlog (for table-based dataloggers) or the instructions that set the output flag
high in mixed-array dataloggers.
Output Processing – Writing to final storage memory a sample or summary
statistic of data measurements. Output processing options include sending a
sample, average, maximum, minimum, total, or wind vector of data to Final
Storage. Each Output Processing data value is kept in a separate location
within the datalogger. This allows multiple output processing for each
measurement. For example, you can average air temperature over a 60-second
interval, a one-hour interval, and a 24-hour interval. See the operator’s manual
or programming software for output processing options available for each
datalogger model.
Overrun Errors – Overrun errors occur when the actual program execution
time exceeds the execution interval. This causes program executions to be
skipped. When an overrun error occurs, the Table Overrun parameter in the
datalogger’s status table is incremented by 1.
Overruns – This entry in the status table provides the number of table
overruns that have occurred. A table overrun occurs when the datalogger has
insufficient time between execution intervals to complete one pass through the
program. This counter is incremented with each table overrun.
A-7