Variables are identified by a unique ID code, whether they are predefined or user-defined: IDs are divided as follows:
Range |
Description |
|---|---|
0x00000000-0x0000FFFF |
Default variable |
0x0001000-0xFFFFFFFE |
User-defined variable |
0xFFFFFF |
Reserved |
CAUTION: Default variables are never saved in the .LAD file, but are always considered to exist.
The default variables are as follows:
ID |
Name |
Type |
Description |
|---|---|---|---|
0x00000001 |
INP(n) |
BOOL |
Input channel |
0x00000002 |
INP_W(n) |
U16 |
Input word 16bit |
0x00000003 |
INP_DW(n) |
U32 |
Input word 32bit |
0x00000004 |
OUT |
BOOL |
Output channel |
0x00000005 |
OUT_W(n) |
U16 |
Output word 16bit |
0x00000006 |
OUT_DW(n) |
U32 |
Output word 32bit |
0x00000007 |
R(n) |
I32 |
Global integer register (volatile) |
0x00000008 |
NVR(n) |
I32 |
Global integer register (non-volatile) |
0x00000009 |
RR(n) |
REAL |
Real global register (volatile) |
0x00000A |
NVRR(n) |
REAL |
Real global register (non-volatile) |
0x00000B |
AM(n) |
U32 |
Alarm mask |
Annotations:
•if the variable is of array type, the array index (n) can be either a constant or an unindexed variable.
•RDE3 creates additional predefined variables with completely arbitrary assignment of IDs (in the range 0x00000100-0x00010000): RTE recognizes such variables by name and not by that ID.
