More Maintenance Friendly: Function Block or Ladder Diagram

[randy1]

What do you guys think? What is more maintenance friendly Function Block programming or ladder diagram programs.

What is more maintenance friendly: Function Block or Ladder Diagram?

If you were faced with a machine that is down and out, would you rather the PLC program with function block style programming or the good old fashion ladder logic?

[vincenzo]

Ladder logic is more visual for me. I just think it's easier since it resembles an electrical schematic. We have Siemens PLC's that use the function block style PLC programming and they can keep it. I can't someone thinking the block style is easier to troubleshoot a machine.

[maintech]

I agree on the ladder logic. I think general machine troubleshooting can be accomplished faster using a ladder diagram. Complex machinery sometimes requires an elaborate setup using PLC function blocks but I rather the good old ladder logic.

[FrancisZ]

For a run-of-the-mill piece of industrial machinery, ladder logic can suffice most of the time. For troubleshooting, ladder logic diagrams are definitely easier to follow than the function block counterparts.

I agree with majority. give me ladder logic or give me death... 

[Cheller]

Also agree that the ladder simulates an electrical diagram, therefore making it easier for a novice to follow. I prefer ladder logic troubleshooting to the function block scenario.