Section 11. Glossary
Term: signature
A number which is a function of the data and the sequence of data in
memory. It is derived using an algorithm that assures a 99.998% probability
that if either the data or the data sequence changes, the signature changes.
See sections Security — Overview
(p. 84) and Signatures (p. 406).
Term: simplex
A serial communication protocol. One-direction data only. Serial
communications between a serial sensor and the CR800 may be simplex.
Reading list: simplex
(p. 515), duplex (p. 282), half duplex (p. 501), and full duplex (p.
500).
Term: single-ended
Denotes a sensor or measurement terminal wherein the analog voltage signal
is carried on a single lead and measured with respect to ground (0 V).
Term: skipped scans
Occur when the CRBasic program is too long for the scan interval. Skipped
scans can cause errors in pulse measurements.
Term: slow sequence
A usually slower secondary scan in the CRBasic program. The main scan has
priority over a slow sequence.
Term: SMTP
Simple Mail Transfer Protocol. A TCP/IP application protocol.
Term: SNP
Snapshot file
Term: SP
Space
Term: state
Whether a device is on or off.
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