Instance DB
S7-GRAPH for S7 300/400 Programming Sequential Control Systems
15-14 C79000-G7076-C526-01
Permanent Instructions
This component of the sequencer status area describes the permanent instructions
that can be programmed before or after the sequencer. The component is omitted
if no permanent instructions are programmed.
Name Description Data
type
Length Read
int.
Write int. Read
Ext.
Write Ext.
PRE_CRIT Status of the permanent
instruction preceding the
sequencer
DWORD 0 - n no no yes no
POST_CRIT Status of the permanent
instructions following the
sequencer
DWORD 0 - n no no yes no
PRE_CNT Number of permanent
instructions preceding the
sequencer
WORD no no yes no
POST_CNT Number of permanent
instructions after the
sequencer
WORD no no yes no
Index Arrays
The first component of the sequencer status area contains the index arrays for
managing the internal step and transition numbers.
Index Name Description Data
Type
Length
in Bytes
Read
int.
Write Int. Read
Ext.
Write
Ext.
TVX Array of valid transitions BYTE <intern> no no yes no
TTX Array of satisfied transitions BYTE <intern> no no yes no
TSX Array of switching transitions BYTE <intern> no no yes no
S00X Array of steps to be deactivated
(second last cycle)
BYTE <intern> no no no no
SOFFX Array_1 of the steps to be
deactivated
BYTE <intern> no no no no
SONX Array_1 of the steps to be
activated
BYTE <intern> no no no no
SAX Array of active steps BYTE <intern> no no yes no
SERRX Array of disturbed steps BYTE S_CNT+2 no no yes no
SMX Array of marked steps BYTE S_CNT+2 no no no no
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