323
BOOL; //BOOL Quantity
INT8U; //8 bits unsigned integer
INT8S; //8 bits signed integer
INT16U //16 bits unsigned integer
INT16S //16 bits signed integer
INT32U //32 bits unsigned integer
INT32S //32 bits signed integer
FP32; // single precision floating
FP64; //double precision floating
Examples: #defineDHD*(INT32S*)&HD //DHD means double word HD
#define FFW*(FP64*)&D //FFW means double precision floating numbers
#define DDW*(long long* )&D //DDW means four words register
Explanation: DHD is 32-bit signed integer. DHD[0] represents a 32-bit signed integer power-
off holding register composed of HD0 and HD1.
Predefined macros: #define true 1
#define false 0
#define TRUE 1
#define FALSE 0
There is no non editable option for the export of header files, others are the same as the
source files.
In C, there are two rules for referencing header files, #include “xx.h”and #include
<xxx.h>. when using the header file in the PLC project, it needs to use #include ”xxx.h in
source file.
Do not use Marco definition #define SysRegAddr in the header file, this Marco definition
is ineffective in the header file, which only can be used in source file.
8-4 Import and Export the Functions
1
．
Export
(1) Function: Export the function as the file, then other PLC program can import to use;
tudonghoatoancau.com
To Next Page
Loading...
Need help?
General
