S5-115F Manual STEP 5 Operations
3.2.11 Substitution Operations
If you plan to process a program with various operands and without a lot of changes, it is advisable
to assign parameters to individual operands ( 2.3.4).
If you have to change the operands, you only need to reassign the parameters in the function
block call.
These parameters are processed in the program as ”formal operands”.
Special operations are necessary for this processing. However, these special operations are no
different in their effect than operations without substitution. A brief description of these
operations and examples follows.
Binary logic operations
Table 3-21 provides an overview of binary logic operations.
Table 3-21. Overview of Binary Logic Operations
Operation MeaningOperand
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Formal operand Actual operands permitted
Parameter Data
Type Type
Inputs, outputs, and flags
addressed in binary form
Timers and counters
I, Q
T , C
BI
A=
AN =
O=
ON =
AND operation
Scan a formal operand for ”1”.
AND operation
Scan a formal operand for ”0”.
OR operation
Scan a formal operand for ”1”.
OR operation
Scan a formal operand for ”0”.
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