Campbell Scientific CR1000KD CR800 and CR850 Measurement and Control Systems - Page 119

Section 7. Installation Table 10. Data Types Name: Command or Argument Description / Word Size Where Used Notes FP2 Campbell Scientific floating point / Final data storage Default final storage data type. Use FP2 for stored data requiring 3 or 4 significant digits. If more significant 2 byte digits are needed, use IEEE4 or an offset. As Float IEEE4 As Long UINT2 UINT4 IEEE Floating Point / 4 byte IEEE Floating Point / 4 byte Signed Integer / 4 byte Unsigned Integer/ 2 byte Unsigned Integer/ 4 byte Dim & Public variables IEEE Standard 754 Final data storage IEEE Standard 754 Dim & Public variables Final data storage Final data storage Final data storage Use to store count data ≤ ±2,147,483,648 Speed -- math with integers is faster than with Floats. Resolution -- has 32 bits compared to 24-bits in IEEE4. Usually not suitable for final data storage (except counts) since fractional portion of values is lost. Use to store positive count data ≤ +65535. Use to store port or flag status. See CRBasic example Load binary information into a variable (p. 112). When Public FLOATs convert to UINT2 at final data storage, values outside the range 0-65535 yield unusable data. INF converts to 65535. NAN converts to 0. Use to store positive count data ≤ 2147483647. Other uses include storage of long ID numbers (such as are read from a bar reader), serial numbers, or address. May also be required for use in some Modbus devices. Resolution / Range Zero Minimum Maximum 0.000 ±0.001 ±7999. Absolute Value Decimal Location 0 -- 7.999 X.XXX 8 -- 79.99 XX.XX 80 - 799.9 XXX.X 800 -- 7999. XXXX. ±1.4 x 10-45 to ±3.4 x 1038 ±1.4 x 10-45 to ±3.4 x 1038 -2,147,483,648 to +2,147,483,647 0 to 65535 0 to 2147483647 119