INFICON PSG55x ATM to Medium Vacuum Gauge (Profibus) - Manual (Page 54)

54
tira56e1 (2010-02) PxG55x.cp
Appendix A: Definitions
Abbreviation Range Data type
INT8 -2 7 … (2 7 - 1) Integer 1 byte
INT16 -2 15 … (2 15 - 1) Integer 2 byte
INT32 -2 31 … (2 31 - 1) Integer 4 byte
UINT8 0 … (2 8 - 1) Unsigned integer 1 byte
UINT16 0 … (2 16 - 1) Unsigned integer 2 byte
UINT32 0 … (2 31 - 1) Unsigned integer 4 byte
FLOAT ±3.402×10 38 Floating point, IEEE 754 Short Real Number,
4 byte
VSTRING(n) Visible string, ISO 646 and ISO 2375
OSTRING(n) Octet string
Boolean 0 ... 1 Boolean
Term Meaning
Byte Number of bytes used by a data structure (integer value)
Store This parameter defines whether the values are stored in non-
volatile memory (
→ store characteristics)
Default Manufacturer-defined value
Abbreviation Meaning
V "Volatile": Value is not saved to the NVRAM or EEPROM and is
lost in the event of a power failure
N "Nonvolatile": Value is saved to the NVRAM or EEPROM and is
not lost in the event of a power failure
D "Dynamic": Value may frequently change and do not need to be
persistent
Abbreviation Meaning
1_R/W Acyclically readable and writeable by a Master Class 1
2_R/W Acyclically readable and writeable by a Master Class 2
1/2_R/W Acyclically readable and writeable by a Master Class 1 and 2
1_R Acyclically readable by a master Class 1
2_R Acyclically readable by a master Class 2
1/2_R Acyclically readable by a master Class 1 and 2
1_W Acyclically writeable by a master Class 1
2_W Acyclically writeable by a master Class 2
1/2_W Acyclically writeable by a master Class 1 and 2
0_XI Cyclic output data with master Class 1
Data types
Definitions
Store characteristics
Data access