Campbell Scientific LoggerNet Datalogger Support Software User Manual

Page 493

Appendix A. Glossary of Terms

Station Number – The LoggerNet server assigns and uses station numbers for

routing packets to the dataloggers. These numbers can be modified using

CoraScript. Not to be confused with datalogger serial numbers, PakBus

addresses, or addresses set in communications peripherals such as RF or MD9

modems.
Storage – An entry in the status table that shows the number of final storage

locations available.
Synchronous – The transmission of data between devices occurs as groups of

zeros and ones. For the data to be “read” correctly, the receiving device must

begin reading at the proper point in the series. In synchronous

communications, this coordination is accomplished by synchronizing the

transmitting and receiving devices to a common clock signal (see

Asynchronous).

Tab Windows – Some screens depict a series of related windows in a multi-

tabbed notebook format. When you click the file folder tab, the information on

the tab you chose will be displayed.
Tables – An entry in the status table that shows the number of user-created

data tables. (See also Data Table.)
Table-based Dataloggers – Table-based dataloggers store each record of data

that follows an output instruction in a table. Each separate occurrence of an

output instruction directs the datalogger to store the data in a separate table.

“Table-based” includes both “TD” table-data and “PB” PakBus versions of the

Edlog dataloggers as well as the CRBasic dataloggers.
Table Definitions – List of data available from a table-based datalogger. The

datalogger supplies this list on request. The tables are determined by the

datalogger program. The LoggerNet server must have a current version of the

table definitions to collect data from the datalogger.
Time Stamp – The date and time when data are stored in the datalogger.
TMStamp – An entry in the status table that shows the date and time the status

information was recorded.
Transaction – The exchange of data or information between two devices or

programs. For example, setting the clock in a datalogger requires a transaction

between the server and the datalogger.

Uncollectable Hole – Occurs when a hole in the data cache cannot be collected

from the datalogger before the data table wraps around and the records are

overwritten.

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