Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 502)

<Appendix G User Program>
App.G-3
IM 11B08A01-01E
DEFDBL: D
Up to 1024 numeric variables can be used (including reserved variables).
 Array Variables
Array variables are declared in DIM statements. One-dimensional arrays and two-dimensional
arrays can be used.
One hundred array variables can be used in one script fi le.
One-dimensional arrays and two-dimensional arrays have up to 1024 elements each.
Variable names that have been used as simple variables cannot be declared in the DIM
statements as array names.
An array name that has been declared cannot also be declared again in the DIM statement.
When an array is declared, all the elements of the array are set to zero.
Arrays are required to be declared in DIM statements (declarations cannot be made implicitly).
One-dimensional array format: Array name (X)
Two-dimensional array format: Array name (X) (Y)
Array defi nition: DIM Array name (X) AS TYPE
DIM Array name (X) (Y) AS TYPE
X, Y: Array size –1
TYPE: INTEGER, REAL, DOUBLE
Example: One-dimensional array statement: DIM RS (4) AS REAL
Element: RS (O), RS (l), RS (2), RS (3), RS (4)
Two-dimensional array statement: DIM IS (2) (3) AS INTEGER
Element:
IS (0) (0) IS (0) (1) IS (0) (2) IS (0) (3)
IS (1) (0) IS (1) (1) IS (1) (2) IS (1) (3)
IS (2) (0) IS (2) (1) IS (2) (2) IS (2) (3)
 Reserved Variables
Reserved variables are variables that are reserved by the system.
User cannot use the variable name in Table 1 as a variable name defi ned by DEFINT, etc.
Table 1 List of reserved variables
Variable Name Data Type Range Function
DATE Integer 1 to 31 Saves the date of the current time setting.
HOUR Integer 0 to 23 Saves the hour of the current time setting.
MIN Integer 0 to 59 Saves the minute of the current time setting.
1.6 Operations
Table 2 shows the categories of arithmetic operation, relational operation and logical operation
and the precedence order of operations.
Table 2 Precedence Order of Operations
Item Symbol (Operator) Precedence Order
Operation in parenthesis ( ) High
Unary operation +, –, NOT ↓
Exponentiation ^ ↓
Multiplication & division *, / ↓
Addition & subtraction +, – ↓
Relational operation =, <, >, >=, <=, <> ↓
Logical operation AND ↓
Logical operation OR, EXOR Low
2nd Edition : May 11, 2012-00
App.G