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ladder logic
(redirected from Relay Ladder Logic)

   Also found in: Acronyms, Wikipedia 0.01 sec.
(programming)ladder logic - Source code formatted in two columns with conditions on the left that lead to outputs on the right:

if (c1) s1 else if (c2) s2 else if (c3) s3 ...


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The relay ladder logic program was only a few hundred bytes in length, looked just like a typical electrical drawing, and could be programmed and maintained by most plant electricians.
The control program is written in traditional relay ladder logic and does not require additional lines of logic to detect fault situations.
InControl CE can be programmed using user-friendly IEC61131-3 relay ladder logic (RLL), sequential function chart (SFC) and structured text (ST) editors and can utilize popular, low-cost I/O from a variety of open I/O systems.
 
 
 
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