Siemens WinAC MP immediate I/O access

AlecTek

Member
Join Date
Sep 2010
Location
Vancouver
Posts
155
System: MP377+ET200S, WinCC Flexible 2008SP1 + Step7 v5.5

I am wondering how can I immediately refresh the ports of the I/O devices without finish the program loop or the PLC scan loop?

Is there any SCL instructions?

Thanks in advance.
 

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