Shilo said:I bought a book but need human instruction on this one.
but there are commands used in the program I have to occasionnally troubleshoot that don't necessarily have ladder equivalents
Shilo said:I think I need STL for Dummies.
Shilo said:there are commands used in the program I have to occasionnally troubleshoot that don't necessarily have ladder equivalents
Shilo said:I have a good understanding of ladder logic but get completely lost trying to read statement lists. Where can I get good training on Step 7 statement list usage. I bought a book but need human instruction on this one.
Johnny T said:Several reasons for programming in Ladder, most of them revolve around making it easy to fault find and modify for your average electrical/PLC guy. It is much easier to 'read' for most of the folk who have started with an electical background and moved over to PLC's as it is very similar to an electrical drawing.
The vast majority of people prefer ladder and I know of customers who insist that when contractors write software for them, they use as much ladder as possible (ie. only using STL for pointers etc).
But.. I suppose, at the end of the day, its about preference. Myself.. I much prefer ladder. ;-)
Figures. STL is Siemens only. If you go to another brand you'll see the statements are different from the Siemens statements. In fact, each and every manufacturer has his own statement list version. Ladder diagramming on the other hand is pretty much the same for all or most brands. So, by urging people to use their, and only their, instruction set, they try to protect their market share.The teacher was from siemens.
Now I understand. I knew that something was wrong with this teacher.So, by urging people to use their, and only their, instruction set, they try to protect their market share.
Maybe it is the problem of the german market. Not many people use here other PLCs then Siemens' PLCs.If you go to another brand you'll see the statements are different from the Siemens statements