ProSoft Technology PS-QS-1x10-0781 - Manual (Page 41)

FieldServer Configuration Manual Page 41 of 90
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5.6.6 Example 3 – Load a Value – Negative Numbers
Only SINT16, SINT32 and FLOAT formatted Data Arrays can store negative numbers. The Preload_Data_Format
must also be specified with one of those formats. Preload_Data_Format must be cast so that the sign is preserved
and then stored in a Data Array whose format can support negative numbers.
Data_Arrays
Data_Array_Name , Data_Format , Data_Array_Length
DA_1
, FLOAT , 20
Preloads
Data_Array_Name , Preload_Data_Value , Preload_Data_Format , Preload_Data_Index
DA_1
, -1 , FLOAT , 0
5.6.7 Example 4 – Load a Value – Floating Point Numbers
Only FLOAT formatted Data Arrays can store floating point numbers. The Preload_Data_Format must also be
specified with ‘FLOAT’. In this example the value 123.456 is stored to the 11th element (index 10) of the Data Array
called ‘DA_1’
Data_Arrays
Data_Array_Name Data_Format Data_Array_Length
DA_1
FLOAT 20
Preloads
Data_Array_Name, Preload_Data_Value, Preload_Data_Format, Preload_Data_Index
DA_1,
123.456, FLOAT, 10
5.6.8 Example 5 – Load a Value – Strings (1)
Strings can be stored in Data Arrays of any format. If the Data Array format is UINT32 or SINT32 then the kernel
will store two characters from the string in each Data Array element.
Data_Arrays
Data_Array_Name, , Data_Format, , Data_Array_Length
DA_1,
, FLOAT, , 20
Preloads
Data_Array_Name , Preload_Data_Value , Preload_Data_Format , Preload_Data_Index
DA_1
, Revision 123aA , STRING , 1
The string ‘Revision 123aA’ is stored starting in the 2nd element (index 1) of the Data Array named DA_1.