Siemens SIMATIC S7-1200, Системное руководство

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100BBasic instructions
7.5 Math
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
189
7.5.4 Negation instruction
Table 7- 44 NEG instruction
LAD / FBD SCL Description
-(in);
The NEG instruction inverts the arithmetic sign of the value at parameter IN and stores
the result in parameter OUT.
1
For LAD and FBD: Click the "???" and select a data type from the drop-down menu.
Table 7- 45 Data types for parameters
Parameter Data type
1
Description
IN SInt, Int, DInt, Real, LReal, Constant Math operation input
OUT SInt, Int, DInt, Real, LReal Math operation output
1
The IN and OUT parameters must be the same data type.
Table 7- 46 ENO status
ENO Description
1 No error
0 The resulting value is outside the valid number range of the selected data type.
Example for SInt: NEG (-128) results in +128 which exceeds the data type maximum.
7.5.5 Increment and decrement instructions
Table 7- 47 INC and DEC instructions
LAD / FBD SCL Description
in_out := 1;
Increments a signed or unsigned integer number value:
IN_OUT value +1 = IN_OUT value
in_out := in_out - 1;
Decrements a signed or unsigned integer number value:
IN_OUT value - 1 = IN_OUT value
1 For LAD and FBD: Click the "???" and select a data type from the drop-down menu.