The functions in this group can be used in a Virtual retentive module. Functions with a retentive character always keep their last result value until they are deliberately reset.
When using these functions in a virtual retentive module, the most recently calculated result value can be saved by stopping the acquisition. When restarting the acquisition, this value can be reloaded as the initial value.
Thus, long-term data, such as operating hours counter and media consumption, are not lost by stopping and starting the acquisition.
Functions with this character are:
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Please note, that only functions, which support the retentive behavior, are allowed to be used in a virtual rententive module. All other functions, including the basic arithmetic operations must not be used in a virtual rentive module and will cause errors. |