B&R Automation Studio Ladder Techniques

nerdfactormax

Member
Join Date
Feb 2008
Location
Adelaide
Posts
17
I am trying to transpose some ladder logic from an AB ML1500 to B&R Automation Studio and I have been stumped by some seemingly trivial logic. Example:
If bit 'A' is on, then move value '0' into variable 'X'.
In RSLogix this would be one rung. It seems that to do the same in AS requires jumps and labels. Am I missing something?
 
You are right.
The MOVE instruction in IEC61131-3 is strange to put it mildly.
If it shall execute conditionally, you have use jumps as you say.

In IL, the move command will look like this.
LD 5
MOVE
ST array1[3]

However, the MOVE instruction doesnt do anything. You could just write
LD 5
ST array1[3]

And I also find the B&R ladder editor very very crude.
 

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