Siemens SIMATIC BATCH Operating Manual page 830

Context help references
14.1 Dialogs
● OP, relational operator: The relational operator (OP) shows the relationship between two
operands. The symbols of relational operators have the following meaning:
– = : Equality.
– <>: Inequality.
– >=: Is the left variable greater than or equal to the right variable?
– <=: Is the left variable smaller than or equal to the right variable?
– >: Is the left variable greater than the right variable?
– <: Is the left variable less than the right variable?
● Act. value: The actual value of the 2nd operand displayed. If no actual value is available,
a symbol is displayed. Hover the mouse pointer over the symbol to view a corresponding
tooltip. This enables you to see at a glance the difference between an empty field (e.g. an
empty character string) and a missing process value (e.g. a unit on which the recipe step
is to be processed has not yet been assigned).
● Variable/value: The name of the variable configured during engineering is entered. This is
the variable used as the 2nd operand used for the condition. The second operand can be
a parameter from the next highest recipe level, a process tag, constant, equation or RPE
status. In the case of a constant, you have the option of performing a linear or quadratic
quantity scaling. An equation is used for the arithmetic calculation of setpoints.
You can use the "Change" button at the bottom right of the dialog to change the values of
constants during batch operation. The "Variable / value" cell is then released for entering
a new value. A write lock symbol is simultaneously displayed at the transition in the control
recipe. Enter a new value for the constant and close the dialog by clicking "OK". The new
value takes immediate effect in batch mode and is valid for this batch.
Note
As the second operand of the condition use constants, the constant is then displayed in
the column "Variable / value" as well as in the column "act. value".
● Effective immediately: A process value for operand 2 can be changed during batch control.
If the transition is currently in progress then the changed parameter value should become
effective immediately. This option can also be set for parameter references.
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Note
Floating point values may not be checked for equivalence or nonequivalence in
transitions. This can lead to invalid value transfer (e.g. 2.1. -> 2.09999996).
SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA