Instance DB
S7-GRAPH for S7 300/400 Programming Sequential Control Systems
15-18 C79000-G7076-C526-01
Indicating the Modes
The modes component is saved in the instance DB as follows:
Structure
Name
Description Length in
Bytes
MOPEDGE System-internal 4
MOP Changing modes and indicators 4
Example:
By setting MOP.MAN once, the mode changes to MANUAL. This can be set either
controlled by the program (for example action in the sequencer) or by the PG
function "Modify Variable" or using an operator panel.
Activation Time
The following component consists of a structure containing information about the
activation time calculation. This is only evaluated internally by the system.
Structure
Name
Description Length in
Bytes
TICKS
System-internal 12
Group Bits
The last component of a sequencer status area contains group bits that monitor the
internal sequencer status. A structure is created as follows for these group bits:
Name Description Data
Type
Read
int.
Write Int. Read
Ext.
Write Ext.
ERR_FLT Group disturbance BOOL yes no yes no
ERROR Interlock error BOOL yes no yes no
FAULT Supervision error BOOL yes no yes no
RT_FAIL Group indication:
Runtime error
BOOL yes no yes no
NO_SNO Selected step does not
exist
BOOL yes no yes no
NF_OFL Too many steps to
activate or deactivate
BOOL yes no yes no
SA_OFL To many active steps BOOL yes no yes no
To Next Page
Loading...
