Term. CPU
Central processing unit. The brains of the CR1000. Also refers to two the
following two memory areas:
o CPU: memory drive
o Memory used by the CPU to store table data.
Term. CR1000KD
An optional hand-held keyboard display for use with the CR1000 datalogger.
See the appendix Keyboard Display -- List
(p. 651).
Term. cr
Carriage return
Term. CRBasic Editor Compile, Save and Send
CRBasic Editor menu command that compiles, saves, and sends the program
to the datalogger.
Term. CRD
An optional memory drive that resides on a memory card. See CompactFlash
(p. 510).
Term. CS I/O
Campbell Scientific proprietary input / output port. Also, the proprietary
serial communication protocol that occurs over the CS I/O port.
Term. CVI
Communication verification interval. The interval at which a PakBus®
device verifies the accessibility of neighbors in its neighbor list. If a neighbor
does not communicate for a period of time equal to 2.5 times the CVI, the
device will send up to four Hellos. If no response is received, the neighbor is
removed from the neighbor list. See the section PakBus — Overview
(p. 88) for
more information.
Term. data cache
The data cache is a set of binary files kept on the hard disk of the computer
running the datalogger support software
(p. 512). A binary file is created for
each table in each datalogger. These files mimic the storage areas in
datalogger memory, and by default are two times the size of the datalogger
storage area. When the software collects data from a CR1000, the data are
stored in the binary file for that CR1000. Various software functions retrieve
data from the data cache instead of the CR1000 directly. This allows the
simultaneous sharing of data among software functions.
Similar in function to a CR1000 final-memory data tables, the binary files for
the data cache are set up by default as ring memory
(p. 526).
511
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