1.1200 / 1500FC not block the data holding function and, especially for the BOOL type data, while the holding function 300 is
for example:
the IF THEN #I_START
#Q_OUT: =. 1;
END_IF;
equivalent to 1200 in jogging function, a press 1 is
equivalent to the function 300 provides set
Siemens 1200/1500 FC write difference block 300 and the SCL language
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Origin blog.csdn.net/ll_sky/article/details/104293824
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