System objects
(Original Document)
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Introduction
Conversion replaces the PL7 objects by their Control Expert equivalent.
System objects
The following table describes any correspondence and differences between PL7 and Control Expert objects.
PL7
Control Expert
Status
Syntax
Type of data
Syntax
Type of data
System bit
%Si (1)
EBOOL
%Si
or
%SXi
BOOL
Converted
System word
%SWi (1)
WORD
%SWi
INT
Converted
Real-time clock system word
%SW50:4
AR_W
%SW50:4
ARRAY [0..3] OF INT at %SW50
Converted
System double word
%SDi
DWORD
%SDi
DINT
Converted
Legend:
(1)
See table below.
System bits and words
The following table describes any correspondence and differences between PL7 and Control Expert bits and system words.
PL7
Control Expert
Status
Syntax
Syntax
System bits
%S36
-
Deleted
%S37
-
%S95
-
System words
%SW160
%SW76
Modified
%SW161
%SW77
%SW162
%SW78
Grafcet system bits
%S21
SG7_21
Modified (1)
%S22
SG7_22
%S23
SG7_23
%S24
SG7_24
%S25
-
Deleted
%S26
-
Grafcet system words
%SW20
-
Deleted
%SW21
-
%SW22
SWG7_22
Modified (1)
%SW23
SWG7_23
%SW24
SWG7_24
%SW25
SWG7_25
%SW125
-
Deleted
%SW126
-
%SW127
-
Legend:
(1)
Grafcet system bits and words are replaced in Control Expert by equivalent EFs.
NOTE: all other system bits and words are converted.