2/22/2018 8:59 AM | |
Joined: 12/16/2012 Last visit: 9/13/2024 Posts: 653 Rating: (130) |
Hi! I can recommend to you the following document for reading: SIMATIC Statement List (STL) for S7-300 and S7-400 Programming You have to understand the role of RLO or result of logic operation, part of the status word. In the above document you also find: "BLD(program display instruction; null instruction) executes no function and does not
affect the status bits. The instruction is used for the programming device (PG) for graphic display. It
is created automatically when a Ladder or FBD program is displayed in STL. The addressspecifies the BLD instruction and is generated by the programming device." |
Last edited by: Jen_Moderator at: 2/22/2018 12:55:54 PMOptimized link. |
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