Campbell Scientific CR9000X Measurement and Control System - Manual (Page 429)

Appendix E. Glossary
single-ended denotes a sensor or measurement terminal where in the analog
voltage signal is carried on a single lead, which is measured with respect
to ground.
skipped scans occur when the CR1000 program is too long for the scan
interval. Skipped scans can cause errors in pulse measurements.
slow sequence is a usually slower secondary scan in the CR1000 CRBASIC
program. The main scan has priority over a slow sequence.
SMTP Simple Mail Transfer Protocol. A TCP/IP application protocol.
SNP Snapshot File.
state whether a device is on or off.
string a datum consisting of alpha-numeric characters.
support software include PC200W, PC400, RTDAQ, LoggerNetTM
synchronous the transmission of data between a transmitting and receiving
device occurs as a series 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 communication, this coordination is
accomplished by synchronizing the transmitting and receiving devices to
a common clock signal (see Asynchronous).
task 1) grouping of CRBASIC program instructions by the CR1000. Tasks
include measurement, SDM, and processing. Tasks are prioritized by a
CR1000 operating in pipeline mode.
TCP/IP Transmission Control Protocol / Internet Protocol.
Telnet a software utility that attempts to contact and interrogate another
specific device in a network.
throughput the throughput rate is the rate at which a measurement can be
made, scaled to engineering units, and the reading stored in a data table.
The CR1000 has the ability to scan sensors at a rate exceeding the
throughput rate. The primary factor affecting throughput rate is the
amount of processing specified by the user. In sequential mode operation,
all processing called for by an instruction must be completed before
moving on the next instruction.
TLL Transistor – Transistor Logic. A serial protocol using 0V and 5V as logic
signal levels.
toggle to reverse the current power state.
UINT2 data type used for efficient storage of totalized pulse counts, port status
(e.g. status of 16 ports stored in one variable) or integer values that store
binary flags.
USR: drive. A portion of CR1000 memory dedicated to the storage of image
or other files.
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