Siemens SIMATIC S7-GRAPH - Page 192

Instance DB
S7-GRAPH for S7 300/400 Programming Sequential Control Systems
15-12 C79000-G7076-C526-01
Component Description Data
Type
Read
int.
Write int. Read
Ext.
Write Ext.
SM System-internal BOOL no no no no
LP System-internal BOOL no no no no
LN System-internal BOOL no no no no
VP System-internal BOOL no no no no
VN System-internal BOOL no no no no
H_IL_ERR System-internal BYTE no no no no
H_SV_FLT System-internal BYTE no no no no
RESERVED Reserve DWORD no no no no
If you selected the "Structure arrays" option, a field with the structures of the steps
is generated, as follows:
Array Name Length in Bytes
G7S (number of steps) * 32
Internal access uses the step number followed by the name of the structure
element.
This means that the following access is possible in conditions or actions:
• S003.X
• S017.T
External access uses only the array element followed by the name of the structure
element.
Note: The array index is the internal step number and not the number assigned by
the user.
• G7S[1].X
• G7S[3].T