Campbell Scientific CR1000KD CR1000 Measurement and Control System - Page 455

Section 11. Glossary FLOAT Four‐byte floating‐point data type. Default CR1000 data type for Public or Dim variables. Same format as IEEE4. IEEE4 is the name used when declaring data type for stored data table data. FP2 Two‐byte floating‐point data type. Default CR1000 data type for stored data. While IEEE four‐byte floating point is used for variables and internal calculations, FP2 is adequate for most stored data. FP2 provides three or four significant digits of resolution, and requires half the memory as IEEE4. FTP File Transfer Protocol. A TCP/IP application protocol. full duplex Systems allow communications simultaneously in both directions. garbage The refuse of the data communication world. When data are sent or received incorrectly (there are numerous reasons why this happens), a string of invalid, meaningless characters (garbage) often results. Two common causes are: 1) a baud‐rate mismatch and 2) synchronous data being sent to an asynchronous device and vice versa. global variable A variable available for use throughout a CRBasic program. The term is usually used in connection with subroutines, differentiating global variables (those declared using Public or Dim) from local variables, which are declared in the Sub() and Function() instructions. ground Being or related to an electrical potential of 0 Volts. half duplex Systems allow bi‐directional communications, but not simultaneously. handshake, handshaking The exchange of predetermined information between two devices to assure each that it is connected to the other. When not used as a clock 455